diff --git a/ATTRIBUTION.toml b/ATTRIBUTION.toml
index dd950075e..73f725955 100644
--- a/ATTRIBUTION.toml
+++ b/ATTRIBUTION.toml
@@ -7,7 +7,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Greek UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "48add323da3a6a7643e8019692712e135d57fc996cf8c91397ca155c128a231b"
+sha256 = "9976cffa76284284c79e3270dcffac1c393148e8c0ee7113d5793fedcbb698ec"
 
 # ATTRIBUTION.toml: one entry per asset (AGENTS.md §1). The source of truth for provenance and licences.
 # ATTRIBUTION.md is generated from this file: `cargo xtask assets --write`. Checked by `cargo xtask assets` (part of `xtask ci`).
@@ -30,7 +30,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Simplified Chinese UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "dacff0f922e0b5c05614dd424e8d2d42ef50ebf88617f9fb46d6397368831c62"
+sha256 = "4597a7131ac94a4893e1f84b6585b4f63d54551795c7c17af1f0c7b60178cd38"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/zh-hant.tsv"
@@ -41,7 +41,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Traditional Chinese UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "050af73f413f418a884779b200399a1f34c60b23f319376720387c4ab8a68bde"
+sha256 = "47af30988b5776a138033de15549df77e198cfe1cc2285e37f94d0af872b259d"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/cs.tsv"
@@ -52,7 +52,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Czech UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "d10d93d5d8a4263f76ec4ff2b422cec460b462811b05e5835bb8e11a8eca420c"
+sha256 = "faee91b7cb2cee41b831779ad6309952d399b83709007b336ca116a506525dec"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/pt-br.tsv"
@@ -63,7 +63,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Brazilian Portuguese UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "8f4b89f85ef458195501f8b94c6ccc49f2613d780e5f96a49c6376f326e21255"
+sha256 = "13bd6b4176147feafd9b1ddff71aa75778c1e01119537ce5e36f6da3284c89b1"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/es.tsv"
@@ -74,7 +74,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Spanish UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "cccacda996b0864810ca50ab5bbe011f086558d29d3d6b85343c6473774ef3d6"
+sha256 = "897fbcf310a56be8b8d5b2b23dfe2c45d4f3c565792c2d28b58161c435d4aa5c"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/fr.tsv"
@@ -85,7 +85,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "French UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "1ab4346ba91874eddc9800c15a40d46e2399cbbf90bba4481785e25961b14602"
+sha256 = "c593532d581c2bae30f0c03be3261256fcae4b703ab154a2cb5e9026247874bd"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/de.tsv"
@@ -96,7 +96,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "German UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "58e9d3d0bdedc03dfd515c767dc7e83d211b54b52783402357c36d9e4012062b"
+sha256 = "a724e544044561df9880a68a924dc2225716095c995ebbe93420e0ddd599835a"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/te.tsv"
@@ -107,7 +107,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Telugu UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "1ab3877b027c600ba3cec01523eac90172098ce800ac32fbee93a98a039e0e71"
+sha256 = "e92ba4c24b2183d90f007f3d50ef1d90ae10e82aea4d45b8f838967cf7db1bde"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/it.tsv"
@@ -118,7 +118,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Italian UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "93a5c2631cfb458bdd06d12b20783c0e9f70d73ef6cc007651824ff04a7ff772"
+sha256 = "e1b873432f3bcd2ccadfbdf90b912e47af8d733062d4d34bd0d338f05b57c6c2"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/pl.tsv"
@@ -129,7 +129,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Polish UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "dccace4145bf5be6961e03413e1baac3022b23343fb8ec1bb80e4b771b9b15c1"
+sha256 = "7ebdede05e7d63b127232e5e3ebb36220a529f12ad73badbfd2c155ecafb31b6"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/ru.tsv"
@@ -140,7 +140,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Russian UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "980f345f77d501e1413b734dd343f70a3fc535752a118647e1c3c71719008672"
+sha256 = "66897289a489e2b65052d9fb21238e882c6d9cf6652d346b072f0e837367ec23"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/hu.tsv"
@@ -151,7 +151,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Hungarian UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "ba02397a61f224605fda9fd17416b5e364724c932392ebdda34153310190c07a"
+sha256 = "a946a8756b80dbb0505b07dbfe0c01ae4260deab6d3b0beb37b43552eef03536"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/bg.tsv"
@@ -162,7 +162,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Bulgarian UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "d59371e117366bf36ff8627db5abc355d354dc73b61d09e20c78028a492c2518"
+sha256 = "0deac0ca8e57642d7d43971fc94d151e500d5234ba0f221a25a0b3754150fef0"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/kk.tsv"
@@ -173,7 +173,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Kazakh UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "c39f98e74458221d474623a67345e54623307a7cb6396d4927439b5cacfec831"
+sha256 = "67aac3be3f312649900310dfdafcdd8233b463e0366185bfe13d97f30eca4df8"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/ja.tsv"
@@ -184,7 +184,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Japanese UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "ac27ed3c24f09c5e727ecce94de2313621394457f6cc03b7ebd440331ae62b99"
+sha256 = "d2131a65c052b25b72c796bcc235de88c3d662814f015de666a5eb112889944f"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/uk.tsv"
@@ -195,7 +195,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Ukrainian UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "b312eadaea1f306399c9285b528bca282a204c559885546cbd1213509a6f08fe"
+sha256 = "320cb208f7e61750480c96e95b3bebe4000efb4bf5218668c3c8d7d630369ec2"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/ar.tsv"
@@ -206,7 +206,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Arabic UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "a0f9d57e72d92ff5c8822c38681774b4cd49c6c2a8d174322c3e8e2404bd4e33"
+sha256 = "b32f085ffd99fd92e7e2457c44aa51bd7a0831734008fa46c542f4691fa4cb30"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/tr.tsv"
@@ -217,7 +217,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Turkish UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "4f0505cf19f18e9152d692861dec6ee9bf1127055e799a65a3305e9d0681a9da"
+sha256 = "9ec9155f36d5b5e36ef1b27646ee72dc625cde0e6ba07c54d633d6aaabe45c8f"
 
 [[asset]]
 path = "crates/ui-egui/src/i18n/lt.tsv"
@@ -228,7 +228,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Lithuanian UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "f8972322dbe61d739bef4a29e3a4a2a16ac267652375413646273e1c1a917515"
+sha256 = "93039a5d4f5b78e29cb6f0212fec4c705fc9a47bc2d89dcf6b00de07d505a608"
 
 
 [[asset]]
@@ -240,7 +240,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Vietnamese UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "a05bf2b649ce3fcfa2f990871daa2b97a6464db7b313f606868688806d23f8e1"
+sha256 = "4cc6a7220f27ce4fcf9787f56d763b6e2aa4e29a682111fd8ab21dac5689f99e"
 
 [[asset]]
 path = "assets/icons/accessibility.svg"
@@ -3363,7 +3363,7 @@ licence = "MIT OR Apache-2.0"
 licence_file = "LICENSE-MIT"
 kind = "translation"
 usage = "Slovene UI strings, compiled in by crates/ui-egui/src/i18n/mod.rs"
-sha256 = "0c6a8713138e05dd8a2996d7e2da097a03e321e5212a4071bbe58c4c846179bf"
+sha256 = "39b64b099db9a6d4d54d1a67f2923dbce0baea9ade737eb8925db8a1faf66ac3"
 
 [[asset]]
 path = "vendor/vello_common/assets/probe.png"
diff --git a/crates/a11y/src/autotag_fields.rs b/crates/a11y/src/autotag_fields.rs
new file mode 100644
index 000000000..3203aca37
--- /dev/null
+++ b/crates/a11y/src/autotag_fields.rs
@@ -0,0 +1,138 @@
+//! Conservative tagging for AcroForm widgets.
+//!
+//! It creates `/Form` structure elements and `/OBJR` children so assistive technology can find
+//! widgets. An existing direct `/Document` root and direct `/ParentTree /Nums` are extended;
+//! unusual tree layouts are refused before any edit is made.
+
+use pdfcraft_cos::{Dict, Document, ObjRef, Object};
+
+fn reference(object: Option<&Object>, what: &str) -> Result<ObjRef, String> {
+    object.and_then(Object::as_ref).ok_or_else(|| format!("the {what} must be an indirect reference"))
+}
+
+fn nums(doc: &Document, parent_tree: ObjRef) -> Result<Vec<Object>, String> {
+    let tree = doc.get(parent_tree);
+    let tree = tree.as_dict().ok_or("the structure parent tree is invalid")?;
+    tree.get(b"Nums")
+        .map(|value| doc.resolve(value))
+        .as_deref()
+        .and_then(Object::as_array)
+        .cloned()
+        .ok_or_else(|| "the structure parent tree must use a direct Nums array".to_string())
+}
+
+/// Add `/Form` tags for every page widget that does not already have a structure parent.
+///
+/// A new structure tree is written for an untagged form. A conventional existing tree is
+/// extended by adding the form tags to its direct `/Document` element and fresh entries to its
+/// direct `/ParentTree /Nums` array. Text, figures, links, and non-widget annotations remain
+/// outside this operation and need separate review.
+pub fn tag_form_fields(doc: &mut Document) -> Result<usize, String> {
+    let root = doc.root().ok_or("the PDF has no catalog")?;
+    let catalog_object = doc.get(root);
+    let catalog = catalog_object.as_dict().ok_or("the PDF catalog is invalid")?;
+    if !catalog.contains(b"AcroForm") {
+        return Err("the PDF has no AcroForm fields".into());
+    }
+    let existing_root = catalog.get(b"StructTreeRoot").cloned();
+    let mark_info = catalog.get(b"MarkInfo").map(|v| doc.resolve(v)).as_deref().and_then(Object::as_dict).cloned().unwrap_or_default();
+    let pages = pdfcraft_model::pages(doc);
+    let mut widgets = Vec::new();
+    // A widget listed in more than one page's /Annots is tagged once (one key, one /Form).
+    let mut seen = std::collections::HashSet::new();
+    for page in &pages {
+        let annots = page.dict.get(b"Annots").map(|a| doc.resolve(a)).as_deref().and_then(Object::as_array).cloned().unwrap_or_default();
+        for annot in annots {
+            let Some(reference) = annot.as_ref() else { continue };
+            let resolved = doc.get(reference);
+            let Some(dict) = resolved.as_dict() else { continue };
+            if dict.name(b"Subtype") == Some(b"Widget") && !dict.contains(b"StructParent") && seen.insert(reference) {
+                widgets.push((page.obj, reference));
+            }
+        }
+    }
+    if widgets.is_empty() {
+        return Err("the AcroForm has no untagged page widgets".into());
+    }
+
+    let (struct_root, document_ref, parent_tree, mut parent_nums, first_key, new_tree) = if let Some(existing_root) = existing_root {
+        let struct_root = reference(Some(&existing_root), "structure tree root")?;
+        let structure_object = doc.get(struct_root);
+        let structure = structure_object.as_dict().ok_or("the structure tree root is invalid")?;
+        let document_ref = reference(structure.get(b"K"), "structure tree root K")?;
+        let document = doc.get(document_ref);
+        if document.as_dict().is_none_or(|d| d.name(b"S") != Some(b"Document")) {
+            return Err("the structure tree root must point directly to a Document element".into());
+        }
+        let parent_tree = reference(structure.get(b"ParentTree"), "structure parent tree")?;
+        let parent_nums = nums(doc, parent_tree)?;
+        if parent_nums.len() % 2 != 0 {
+            return Err("the structure parent tree has an odd number of entries".into());
+        }
+        let mut greatest = -1_i64;
+        for pair in parent_nums.as_chunks::<2>().0 {
+            let Some(key) = pair[0].as_int() else { return Err("the structure parent tree has a non-integer key".into()) };
+            if key < 0 {
+                return Err("the structure parent tree has a negative key".into());
+            }
+            greatest = greatest.max(key);
+        }
+        let first_key = greatest.checked_add(1).ok_or("the structure parent tree has no available key")?;
+        (struct_root, document_ref, parent_tree, parent_nums, first_key, false)
+    } else {
+        let mut root_dict = Dict::new();
+        root_dict.set(b"Type".to_vec(), Object::Name(b"StructTreeRoot".to_vec()));
+        let struct_root = doc.add(Object::Dict(root_dict));
+        let mut document = Dict::new();
+        document.set(b"S".to_vec(), Object::Name(b"Document".to_vec()));
+        document.set(b"P".to_vec(), Object::Ref(struct_root));
+        let document_ref = doc.add(Object::Dict(document));
+        let parent_tree = doc.add(Object::Dict(Dict::new()));
+        (struct_root, document_ref, parent_tree, Vec::new(), 0, true)
+    };
+    let mut kids = Vec::with_capacity(widgets.len());
+    for (offset, (page, widget)) in widgets.iter().copied().enumerate() {
+        let key = first_key.checked_add(i64::try_from(offset).map_err(|_| "too many form widgets")?).ok_or("too many form widgets")?;
+        let mut objr = Dict::new();
+        objr.set(b"Type".to_vec(), Object::Name(b"OBJR".to_vec()));
+        objr.set(b"Obj".to_vec(), Object::Ref(widget));
+        objr.set(b"Pg".to_vec(), Object::Ref(page));
+        let mut form = Dict::new();
+        form.set(b"S".to_vec(), Object::Name(b"Form".to_vec()));
+        form.set(b"P".to_vec(), Object::Ref(document_ref));
+        form.set(b"Pg".to_vec(), Object::Ref(page));
+        form.set(b"K".to_vec(), Object::Dict(objr));
+        let form_ref = doc.add(Object::Dict(form));
+        doc.update_dict(widget, |d| d.set(b"StructParent".to_vec(), Object::Int(key))).map_err(|e| e.to_string())?;
+        parent_nums.extend([Object::Int(key), Object::Ref(form_ref)]);
+        kids.push(Object::Ref(form_ref));
+    }
+    doc.update_dict(document_ref, |d| {
+        let old = d.remove(b"K").unwrap_or(Object::Array(Vec::new()));
+        let mut all = match old {
+            Object::Array(items) => items,
+            item => vec![item],
+        };
+        all.extend(kids);
+        d.set(b"K".to_vec(), Object::Array(all));
+    })
+    .map_err(|e| e.to_string())?;
+    doc.update_dict(parent_tree, |d| d.set(b"Nums".to_vec(), Object::Array(parent_nums))).map_err(|e| e.to_string())?;
+    if new_tree {
+        doc.update_dict(struct_root, |d| {
+            d.set(b"K".to_vec(), Object::Ref(document_ref));
+            d.set(b"ParentTree".to_vec(), Object::Ref(parent_tree));
+        })
+        .map_err(|e| e.to_string())?;
+    }
+    let mut mark_info = mark_info;
+    mark_info.set(b"Marked".to_vec(), Object::Bool(true));
+    doc.update_dict(root, |d| {
+        d.set(b"MarkInfo".to_vec(), Object::Dict(mark_info));
+        if new_tree {
+            d.set(b"StructTreeRoot".to_vec(), Object::Ref(struct_root));
+        }
+    })
+    .map_err(|e| e.to_string())?;
+    Ok(widgets.len())
+}
diff --git a/crates/a11y/src/lib.rs b/crates/a11y/src/lib.rs
index cc3edd60f..77c08e4d6 100644
--- a/crates/a11y/src/lib.rs
+++ b/crates/a11y/src/lib.rs
@@ -14,6 +14,7 @@ use pdfcraft_cos::Document;
 
 mod alt;
 mod autotag;
+mod autotag_fields;
 mod content;
 mod headings;
 mod report;
@@ -22,6 +23,7 @@ mod tags;
 
 pub use alt::{AltError, ArtifactError, Figure, figures, mark_decorative, mark_tag_artifact, set_alt};
 pub use autotag::{AutoTagError, AutoTagResult, autotag_text};
+pub use autotag_fields::tag_form_fields;
 pub use headings::{Heading, headings};
 pub use report::{REPORT_WORDS, report_html};
 pub use tags::{TagError, TagInfo, TagPlacement, TagProperty, move_tag, set_tag_property, tags};
diff --git a/crates/a11y/src/tests.rs b/crates/a11y/src/tests.rs
index 6f85b8cbf..a3a14a79b 100644
--- a/crates/a11y/src/tests.rs
+++ b/crates/a11y/src/tests.rs
@@ -96,6 +96,78 @@ fn autotag_text_refuses_paint_and_does_not_modify_the_document() {
     assert_eq!(autotag_text(&mut pdf(&good(), "")), Err(AutoTagError::AlreadyTagged));
 }
 
+#[test]
+fn autotag_form_fields_writes_widget_structure_and_parent_tree() {
+    let mut doc = pdf(
+        &[
+            "<< /Type /Catalog /Pages 2 0 R /AcroForm << /Fields [5 0 R] >> >>".into(),
+            "<< /Type /Pages /Kids [3 0 R] /Count 1 >>".into(),
+            "<< /Type /Page /Parent 2 0 R /MediaBox [0 0 200 200] /Annots [5 0 R 6 0 R] >>".into(),
+            "<< /Length 0 >>\nstream\n\nendstream".into(),
+            "<< /FT /Tx /T (name) /Kids [6 0 R] >>".into(),
+            "<< /Type /Annot /Subtype /Widget /Parent 5 0 R /Rect [20 60 120 80] >>".into(),
+        ],
+        "",
+    );
+    assert_eq!(tag_form_fields(&mut doc).unwrap(), 1);
+    let report = check(&doc, &Options { rules: [Rule::TaggedPdf, Rule::TaggedFormFields].into(), pages: None });
+    assert_eq!(status(&report, Rule::TaggedPdf), Status::Passed);
+    assert_eq!(status(&report, Rule::TaggedFormFields), Status::Passed);
+    let tree = doc.get(doc.root().unwrap()).as_dict().unwrap().reference(b"StructTreeRoot").unwrap();
+    assert!(doc.get(tree).as_dict().unwrap().contains(b"ParentTree"));
+    let widget = pdfcraft_model::pages(&doc)[0].dict.get(b"Annots").and_then(|a| doc.resolve(a).as_array().cloned()).unwrap()[1].as_ref().unwrap();
+    assert_eq!(doc.get(widget).as_dict().unwrap().get(b"StructParent").and_then(Object::as_int), Some(0));
+    let written = pdfcraft_cos::write_full(&doc, &pdfcraft_cos::SaveOptions::default()).unwrap();
+    let reopened = Document::open(Arc::new(written)).unwrap();
+    assert_eq!(status(&check(&reopened, &Options { rules: [Rule::TaggedFormFields].into(), pages: None }), Rule::TaggedFormFields), Status::Passed);
+}
+
+#[test]
+fn autotag_form_fields_tags_a_widget_listed_on_two_pages_once() {
+    let mut doc = pdf(
+        &[
+            "<< /Type /Catalog /Pages 2 0 R /AcroForm << /Fields [5 0 R] >> >>".into(),
+            "<< /Type /Pages /Kids [3 0 R 6 0 R] /Count 2 >>".into(),
+            "<< /Type /Page /Parent 2 0 R /MediaBox [0 0 200 200] /Annots [5 0 R] >>".into(),
+            "<< /Length 0 >>\nstream\n\nendstream".into(),
+            "<< /Type /Annot /Subtype /Widget /FT /Tx /T (name) /Rect [20 60 120 80] >>".into(),
+            "<< /Type /Page /Parent 2 0 R /MediaBox [0 0 200 200] /Annots [5 0 R] >>".into(),
+        ],
+        "",
+    );
+    assert_eq!(tag_form_fields(&mut doc).unwrap(), 1);
+    let tree = doc.get(doc.root().unwrap()).as_dict().unwrap().reference(b"StructTreeRoot").unwrap();
+    let parent_tree = doc.get(tree).as_dict().unwrap().reference(b"ParentTree").unwrap();
+    let nums = doc.get(parent_tree).as_dict().unwrap().get(b"Nums").and_then(|n| n.as_array().cloned()).unwrap();
+    assert_eq!(nums.len(), 2, "one key and one /Form element for the shared widget");
+}
+
+#[test]
+fn autotag_form_fields_extends_a_direct_existing_structure_tree() {
+    let mut doc = pdf(
+        &[
+            "<< /Type /Catalog /Pages 2 0 R /AcroForm << /Fields [5 0 R] >> /MarkInfo << /Marked true >> /StructTreeRoot 6 0 R >>".into(),
+            "<< /Type /Pages /Kids [3 0 R] /Count 1 >>".into(),
+            "<< /Type /Page /Parent 2 0 R /MediaBox [0 0 200 200] /Annots [5 0 R] /StructParents 0 >>".into(),
+            "<< /Length 0 >>\nstream\n\nendstream".into(),
+            "<< /Type /Annot /Subtype /Widget /FT /Tx /T (name) /Rect [20 60 120 80] >>".into(),
+            "<< /Type /StructTreeRoot /K 7 0 R /ParentTree 8 0 R >>".into(),
+            "<< /S /Document /P 6 0 R /K 9 0 R >>".into(),
+            "<< /Nums [0 [9 0 R]] >>".into(),
+            "<< /S /P /P 7 0 R /Pg 3 0 R /K 0 >>".into(),
+        ],
+        "",
+    );
+    assert_eq!(tag_form_fields(&mut doc).unwrap(), 1);
+    let widget = pdfcraft_model::pages(&doc)[0].dict.get(b"Annots").and_then(|a| doc.resolve(a).as_array().cloned()).unwrap()[0].as_ref().unwrap();
+    assert_eq!(doc.get(widget).as_dict().unwrap().get(b"StructParent").and_then(Object::as_int), Some(1));
+    let report = check(&doc, &Options { rules: [Rule::TaggedFormFields].into(), pages: None });
+    assert_eq!(status(&report, Rule::TaggedFormFields), Status::Passed);
+    let document_object = doc.get(pdfcraft_cos::ObjRef::new(7, 0));
+    let document = document_object.as_dict().unwrap();
+    assert_eq!(document.get(b"K").and_then(Object::as_array).unwrap().len(), 2, "the existing paragraph and new form remain siblings");
+}
+
 #[test]
 fn an_untagged_document_fails_the_document_rules() {
     let doc = pdf(
diff --git a/crates/automation/src/a11y.rs b/crates/automation/src/a11y.rs
index 85df2d95d..28b75ca78 100644
--- a/crates/automation/src/a11y.rs
+++ b/crates/automation/src/a11y.rs
@@ -217,6 +217,19 @@ impl Automation {
         }))
     }
 
+    pub(crate) fn accessibility_autotag_form_fields(&mut self, a: &Args) -> Result<Value> {
+        let id = self.doc(a)?.id;
+        self.session.apply(id, pdfcraft_engine::Edit::AutoTagFormFields).map_err(failed)?;
+        let report = self
+            .doc(a)?
+            .accessibility_check(&Options { rules: [Rule::TaggedFormFields].into(), pages: None })
+            .ok_or_else(|| failed("the document can't be read"))?;
+        let result = report.result(Rule::TaggedFormFields).ok_or_else(|| failed("the form field check is unavailable"))?;
+        Ok(
+            json!({ "status": status_id(result.status), "remaining_findings": result.findings.len(), "note": "Only form widgets were tagged. Review text, figures, links, reading order, and other document content separately." }),
+        )
+    }
+
     pub(crate) fn accessibility_autotag_preview(&self, a: &Args) -> Result<Value> {
         let page = self.page(a)?;
         let preview = self.doc(a)?.autotag_preview(page).map_err(failed)?;
diff --git a/crates/automation/src/lib.rs b/crates/automation/src/lib.rs
index f2d5cbbed..c83a3b43b 100644
--- a/crates/automation/src/lib.rs
+++ b/crates/automation/src/lib.rs
@@ -765,6 +765,7 @@ impl Automation {
             "accessibility_check" => self.a11y_check(&a)?,
             "accessibility_autotag_preview" => self.accessibility_autotag_preview(&a)?,
             "accessibility_autotag_apply" => self.accessibility_autotag_apply(&a)?,
+            "accessibility_autotag_form_fields" => self.accessibility_autotag_form_fields(&a)?,
             "ocr_recognize" => self.ocr_recognize(&a)?,
             "js_run" => self.js_run(&a)?,
             "js_document_scripts" => self.js_document_scripts(&a)?,
diff --git a/crates/automation/src/tools.rs b/crates/automation/src/tools.rs
index 4b6182027..540e99f1a 100644
--- a/crates/automation/src/tools.rs
+++ b/crates/automation/src/tools.rs
@@ -928,6 +928,9 @@ pub fn tools() -> Vec<ToolDef> {
             .with(schema(json!({ "doc": doc(), "page": { "type": "integer", "minimum": 1 } }), &["doc", "page"])),
         t("accessibility_autotag_apply", "Automatically tag text-only PDF", "Write marked content, a Document structure element, paragraph tags and a parent tree for every text object in an untagged, text-only PDF. Refuses graphics, images, annotations, forms, existing tags and malformed streams before changing anything. Review all resulting roles; this does not certify accessibility. Undoable.")
             .with(schema(json!({ "doc": doc() }), &["doc"])),
+        t("accessibility_autotag_form_fields", "Tag form fields", "Write `/Form` tags, widget structure-parent keys, and a parent tree for all page widgets in an untagged AcroForm. Existing tag trees are refused for review. Text, figures, links, and other content are not tagged.")
+            .cmd("a11y.autotag_fields")
+            .with(schema(json!({ "doc": doc() }), &["doc"])),
         t("accessibility_check", "Check for accessibility", "Run the Accessibility Checker's full check (32 rules in 7 categories: document, page_content, forms, alternate_text, tables, lists, headings). Each rule is passed, failed (with findings and pages), manual (needs a person) or skipped. Findings on locatable figures, annotations and form widgets include bbox_user_space in PDF coordinates. Colour contrast is off unless all is true; rules (ids such as tagged-pdf, figures-alt-text) or categories narrow the check; pages limit the page rules.")
             .ro()
             .cmd("a11y.check")
diff --git a/crates/automation/tests/automation.rs b/crates/automation/tests/automation.rs
index 6e03f7231..e513f09e7 100644
--- a/crates/automation/tests/automation.rs
+++ b/crates/automation/tests/automation.rs
@@ -291,7 +291,22 @@ fn autotag_apply_writes_reviewable_tags_and_survives_save_reopen() {
     let pages = pdfcraft_model::pages(&reopened);
     assert_eq!(pages.len(), 2);
     assert!(pages.iter().all(|page| page.dict.contains(b"StructParents")));
-    assert!(reopened.get(reopened.root().unwrap()).as_dict().unwrap().contains(b"StructTreeRoot"));
+}
+
+#[test]
+fn autotag_form_fields_writes_reviewable_widget_tags() {
+    let dir = workdir("autotag-form-fields");
+    std::fs::write(dir.join("field.pdf"), form_pdf("name")).unwrap();
+    let mut a = auto(&dir);
+    let doc = ok(&mut a, "doc_open", json!({ "path": "field.pdf" }))["doc"].as_u64().unwrap();
+    let tagged = ok(&mut a, "accessibility_autotag_form_fields", json!({ "doc": doc }));
+    assert_eq!(tagged["status"], "passed");
+    assert_eq!(tagged["remaining_findings"], 0);
+    ok(&mut a, "doc_save", json!({ "doc": doc, "path": "tagged.pdf" }));
+    let reopened = ok(&mut a, "doc_open", json!({ "path": "tagged.pdf" }))["doc"].as_u64().unwrap();
+    let check = ok(&mut a, "accessibility_check", json!({ "doc": reopened, "rules": ["tagged-form-fields"] }));
+    let result = check["results"].as_array().unwrap().iter().find(|result| result["rule"] == "tagged-form-fields").unwrap();
+    assert_eq!(result["status"], "passed");
 }
 
 /// A one-page PDF whose form holds one text field named `name`.
diff --git a/crates/engine/src/catalog.rs b/crates/engine/src/catalog.rs
index d467ca2cb..d56112498 100644
--- a/crates/engine/src/catalog.rs
+++ b/crates/engine/src/catalog.rs
@@ -472,6 +472,7 @@ pub static TOOL_GROUPS: &[ToolGroup] = &[
             title: "Accessibility",
             items: &[
                 item("Automatically tag PDF", "tag", "a11y.autotag", Ready),
+                item("Tag form fields", "tag", "a11y.autotag_fields", Ready),
                 item("Change reading options", "book-open", "a11y.reading_options", Ready),
                 item("Check for accessibility", "accessibility", "a11y.check", Ready),
                 item("Open accessibility report", "file-text", "a11y.report", Ready),
diff --git a/crates/engine/src/commands.rs b/crates/engine/src/commands.rs
index e3dd581f2..9766edd9f 100644
--- a/crates/engine/src/commands.rs
+++ b/crates/engine/src/commands.rs
@@ -336,6 +336,7 @@ pub const COMMANDS: &[CommandSpec] = &[
     c("a11y.report", "Open accessibility report", None, None, Document, "file-text"),
     c("a11y.reading_options", "Change reading options…", None, None, Document, "book-open"),
     c("a11y.alt_text", "Add alternate text…", None, None, Modification, "image"),
+    c("a11y.autotag_fields", "Tag form fields", None, None, Modification, "tag"),
     c("a11y.tags", "Tags panel", None, None, Document, "tag"),
     c("export.all_images", "Export all images…", FILE, None, Copying, "image"),
     c("edit.header_footer", "Add header & footer…", None, None, Modification, "heading"),
diff --git a/crates/engine/src/lib.rs b/crates/engine/src/lib.rs
index 2bca86ab2..8264da23c 100644
--- a/crates/engine/src/lib.rs
+++ b/crates/engine/src/lib.rs
@@ -1471,6 +1471,8 @@ pub enum Edit {
         figure: u32,
         alt: Option<String>,
     },
+    /// Add `/Form` tags and object references for all widgets in an untagged AcroForm.
+    AutoTagFormFields,
     /// Change one property on a reachable indirect structure tag.
     SetTagProperty {
         object: pdfcraft_cos::ObjRef,
@@ -1961,6 +1963,7 @@ impl Edit {
             Edit::SetInitialView(_) => Label::of("Change initial view"),
             Edit::AutoTagText => Label::of("Automatically tag text"),
             Edit::SetAltText { .. } => Label::of("Set alternate text"),
+            Edit::AutoTagFormFields => Label::of("Tag form fields"),
             Edit::SetTagProperty { .. } => Label::of("Change tag properties"),
             Edit::MoveTag { .. } => Label::of("Move object"),
             Edit::MarkDecorative { .. } => Label::of("Mark figure as decorative"),
@@ -2156,6 +2159,7 @@ fn check_permission(edit: &Edit, p: &pdfcraft_cos::Permissions) -> Result<(), Ed
         | Edit::SetInitialView(_)
         | Edit::AutoTagText
         | Edit::SetAltText { .. }
+        | Edit::AutoTagFormFields
         | Edit::SetTagProperty { .. }
         | Edit::MoveTag { .. }
         | Edit::MarkDecorative { .. }
@@ -2444,6 +2448,9 @@ fn run_edit(doc: &mut pdfcraft_cos::Document, edit: &Edit, cx: &mut EditCtx) ->
             let r = pdfcraft_cos::ObjRef::new(*figure, doc.generation(*figure));
             a11y::set_alt(doc, r, alt.as_deref()).map_err(|e| EditError::Accessibility(e.to_string()))?;
         }
+        Edit::AutoTagFormFields => {
+            a11y::tag_form_fields(doc).map_err(EditError::Accessibility)?;
+        }
         Edit::SetTagProperty { object, property, value } => {
             a11y::set_tag_property(doc, *object, *property, value.as_deref()).map_err(|e| EditError::Accessibility(e.to_string()))?;
         }
diff --git a/crates/ui-egui/src/a11y_ui.rs b/crates/ui-egui/src/a11y_ui.rs
index 67683beb5..b700536b9 100644
--- a/crates/ui-egui/src/a11y_ui.rs
+++ b/crates/ui-egui/src/a11y_ui.rs
@@ -608,6 +608,12 @@ pub(crate) fn alt_body(ui: &mut egui::Ui, app: &mut PdfCraftApp, t: &Tokens) ->
 }
 
 impl PdfCraftApp {
+    /// Prepare for accessibility ▸ Tag form fields.
+    pub(crate) fn autotag_form_fields(&mut self) {
+        self.apply_edit(pdfcraft_engine::Edit::AutoTagFormFields);
+        self.choose_right_panel(Some(RightPanel::Tags));
+    }
+
     /// Prepare for accessibility ▸ Add alternate text.
     pub(crate) fn start_alt_text(&mut self) {
         let Some((_, id)) = self.active_ids() else { return };
diff --git a/crates/ui-egui/src/commands.rs b/crates/ui-egui/src/commands.rs
index 18aee2732..f21c8c309 100644
--- a/crates/ui-egui/src/commands.rs
+++ b/crates/ui-egui/src/commands.rs
@@ -424,6 +424,7 @@ impl PdfCraftApp {
                 }
             }
             "a11y.alt_text" => self.start_alt_text(),
+            "a11y.autotag_fields" => self.autotag_form_fields(),
             "a11y.tags" => self.choose_right_panel(Some(RightPanel::Tags)),
             "a11y.reading_options" => self.dialog = Some(Dialog::Properties(crate::PropsTab::Advanced)),
             "export.all_images" => self.dialog = Some(Dialog::Export(crate::export_ui::ExportKind::AllImages)),
diff --git a/crates/ui-egui/src/i18n/ar.tsv b/crates/ui-egui/src/i18n/ar.tsv
index 409c9a000..4ced5c54f 100644
--- a/crates/ui-egui/src/i18n/ar.tsv
+++ b/crates/ui-egui/src/i18n/ar.tsv
@@ -2394,6 +2394,7 @@ animation effects	Off	معطّلة
 	This document is trying to open a local file:	يحاول هذا المستند فتح ملف محلي:
 	Move tag earlier	نقل العلامة للأعلى
 	Move tag later	نقل العلامة للأسفل
+	Tag form fields	وضع علامات على حقول النموذج
 	Mark as artifact	وضع علامة كعنصر زخرفي
 	Remove this leaf tag from reading order and mark its direct content as an artifact	أزل هذه العلامة من ترتيب القراءة وضع علامة على محتواها المباشر كعنصر زخرفي
 	Mark content as artifact	وضع علامة على المحتوى كعنصر زخرفي
diff --git a/crates/ui-egui/src/i18n/bg.tsv b/crates/ui-egui/src/i18n/bg.tsv
index 8c4335172..2a91b69c7 100644
--- a/crates/ui-egui/src/i18n/bg.tsv
+++ b/crates/ui-egui/src/i18n/bg.tsv
@@ -2336,6 +2336,7 @@ animation effects	Off	Изключени
 	This document is trying to open a local file:	Този документ се опитва да отвори локален файл:
 	Move tag earlier	Преместване на етикета по-рано
 	Move tag later	Преместване на етикета по-късно
+	Tag form fields	Маркиране на полетата на формуляра
 	Mark as artifact	Маркиране като артефакт
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Премахнете този листов етикет от реда на четене и маркирайте прякото му съдържание като артефакт
 	Mark content as artifact	Маркиране на съдържание като артефакт
diff --git a/crates/ui-egui/src/i18n/cs.tsv b/crates/ui-egui/src/i18n/cs.tsv
index b1be27536..ad8bacb30 100644
--- a/crates/ui-egui/src/i18n/cs.tsv
+++ b/crates/ui-egui/src/i18n/cs.tsv
@@ -2447,6 +2447,7 @@ animation effects	Off	Vypnuto
 	This document is trying to open a local file:	Tento dokument se pokouší otevřít místní soubor:
 	Move tag earlier	Přesunout značku dříve
 	Move tag later	Přesunout značku později
+	Tag form fields	Označit pole formuláře
 	Mark as artifact	Označit jako artefakt
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Odeberte tuto značku listu z pořadí čtení a označte její přímý obsah jako artefakt
 	Mark content as artifact	Označit obsah jako artefakt
diff --git a/crates/ui-egui/src/i18n/de.tsv b/crates/ui-egui/src/i18n/de.tsv
index 2904d2635..fb841e220 100644
--- a/crates/ui-egui/src/i18n/de.tsv
+++ b/crates/ui-egui/src/i18n/de.tsv
@@ -2374,6 +2374,7 @@ animation effects	Off	Aus
 	This document is trying to open a local file:	Dieses Dokument versucht, eine lokale Datei zu öffnen:
 	Move tag earlier	Tag früher verschieben
 	Move tag later	Tag später verschieben
+	Tag form fields	Formularfelder taggen
 	Mark as artifact	Als Artefakt markieren
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Dieses Blatt-Tag aus der Lesereihenfolge entfernen und seinen direkten Inhalt als Artefakt markieren
 	Mark content as artifact	Inhalt als Artefakt markieren
diff --git a/crates/ui-egui/src/i18n/el.tsv b/crates/ui-egui/src/i18n/el.tsv
index df3981acc..88db08b5f 100644
--- a/crates/ui-egui/src/i18n/el.tsv
+++ b/crates/ui-egui/src/i18n/el.tsv
@@ -2383,6 +2383,7 @@ animation effects	Off	Ανενεργά
 	This document is trying to open a local file:	Αυτό το έγγραφο προσπαθεί να ανοίξει ένα τοπικό αρχείο:
 	Move tag earlier	Μετακίνηση ετικέτας νωρίτερα
 	Move tag later	Μετακίνηση ετικέτας αργότερα
+	Tag form fields	Επισήμανση πεδίων φόρμας
 	Mark as artifact	Σήμανση ως τεχνούργημα
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Αφαιρέστε αυτήν την ετικέτα φύλλου από τη σειρά ανάγνωσης και σημειώστε το άμεσο περιεχόμενό της ως τεχνούργημα
 	Mark content as artifact	Σήμανση περιεχομένου ως τεχνούργημα
diff --git a/crates/ui-egui/src/i18n/es.tsv b/crates/ui-egui/src/i18n/es.tsv
index 6d4153da4..393d48252 100644
--- a/crates/ui-egui/src/i18n/es.tsv
+++ b/crates/ui-egui/src/i18n/es.tsv
@@ -2513,6 +2513,7 @@ animation effects	Off	Desactivados
 	This document is trying to open a local file:	Este documento intenta abrir un archivo local:
 	Move tag earlier	Mover etiqueta antes
 	Move tag later	Mover etiqueta después
+	Tag form fields	Etiquetar campos de formulario
 	Mark as artifact	Marcar como artefacto
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Quite esta etiqueta hoja del orden de lectura y marque su contenido directo como artefacto
 	Mark content as artifact	Marcar contenido como artefacto
diff --git a/crates/ui-egui/src/i18n/fr.tsv b/crates/ui-egui/src/i18n/fr.tsv
index a7a9b8b4d..627af91c6 100644
--- a/crates/ui-egui/src/i18n/fr.tsv
+++ b/crates/ui-egui/src/i18n/fr.tsv
@@ -2373,6 +2373,7 @@ animation effects	Off	Désactivés
 	This document is trying to open a local file:	Ce document tente d’ouvrir un fichier local :
 	Move tag earlier	Déplacer la balise plus tôt
 	Move tag later	Déplacer la balise plus tard
+	Tag form fields	Baliser les champs de formulaire
 	Mark as artifact	Marquer comme artefact
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Retirez cette balise feuille de l’ordre de lecture et marquez son contenu direct comme artefact
 	Mark content as artifact	Marquer le contenu comme artefact
diff --git a/crates/ui-egui/src/i18n/hu.tsv b/crates/ui-egui/src/i18n/hu.tsv
index cc5290227..0bb1af4fc 100644
--- a/crates/ui-egui/src/i18n/hu.tsv
+++ b/crates/ui-egui/src/i18n/hu.tsv
@@ -2372,6 +2372,7 @@ animation effects	Off	Ki
 	This document is trying to open a local file:	Ez a dokumentum egy helyi fájlt próbál megnyitni:
 	Move tag earlier	Címke korábbra helyezése
 	Move tag later	Címke későbbre helyezése
+	Tag form fields	Űrlapmezők címkézése
 	Mark as artifact	Megjelölés műtárgyként
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Távolítsa el ezt a levélcímkét az olvasási sorrendből, és jelölje meg a közvetlen tartalmát műtárgyként
 	Mark content as artifact	Tartalom megjelölése műtárgyként
diff --git a/crates/ui-egui/src/i18n/it.tsv b/crates/ui-egui/src/i18n/it.tsv
index 3638902a6..244bec46f 100644
--- a/crates/ui-egui/src/i18n/it.tsv
+++ b/crates/ui-egui/src/i18n/it.tsv
@@ -2382,6 +2382,7 @@ animation effects	Off	Disattivati
 	This document is trying to open a local file:	Questo documento sta tentando di aprire un file locale:
 	Move tag earlier	Sposta tag prima
 	Move tag later	Sposta tag dopo
+	Tag form fields	Assegna tag ai campi del modulo
 	Mark as artifact	Segna come artefatto
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Rimuovi questo tag foglia dall'ordine di lettura e segna il suo contenuto diretto come artefatto
 	Mark content as artifact	Segna il contenuto come artefatto
diff --git a/crates/ui-egui/src/i18n/ja.tsv b/crates/ui-egui/src/i18n/ja.tsv
index 01ddce01e..c86f3b779 100644
--- a/crates/ui-egui/src/i18n/ja.tsv
+++ b/crates/ui-egui/src/i18n/ja.tsv
@@ -2373,6 +2373,7 @@ animation effects	Off	オフ
 	This document is trying to open a local file:	この文書はローカルファイルを開こうとしています：
 	Move tag earlier	タグを前へ移動
 	Move tag later	タグを後へ移動
+	Tag form fields	フォームフィールドにタグを付ける
 	Mark as artifact	アーティファクトとしてマーク
 	Remove this leaf tag from reading order and mark its direct content as an artifact	このリーフタグを読み上げ順序から削除し、その直接のコンテンツをアーティファクトとしてマークします
 	Mark content as artifact	コンテンツをアーティファクトとしてマーク
diff --git a/crates/ui-egui/src/i18n/kk.tsv b/crates/ui-egui/src/i18n/kk.tsv
index 17dec3dd7..7dc74422c 100644
--- a/crates/ui-egui/src/i18n/kk.tsv
+++ b/crates/ui-egui/src/i18n/kk.tsv
@@ -2371,6 +2371,7 @@ animation effects	Off	Өшірулі
 	This document is trying to open a local file:	Бұл құжат жергілікті файлды ашуға әрекеттеніп жатыр:
 	Move tag earlier	Тегті ертерек жылжыту
 	Move tag later	Тегті кейінірек жылжыту
+	Tag form fields	Пішін өрістерін тегтеу
 	Mark as artifact	Артефакт ретінде белгілеу
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Осы жапырақ тегін оқу ретінен алып тастап, оның тікелей мазмұнын артефакт ретінде белгілеңіз
 	Mark content as artifact	Мазмұнды артефакт ретінде белгілеу
diff --git a/crates/ui-egui/src/i18n/lt.tsv b/crates/ui-egui/src/i18n/lt.tsv
index ce77c5bb9..4ff1061b1 100644
--- a/crates/ui-egui/src/i18n/lt.tsv
+++ b/crates/ui-egui/src/i18n/lt.tsv
@@ -2617,6 +2617,7 @@ key	Space	Tarpas
 	This document is trying to open a local file:	Šis dokumentas bando atverti vietinį failą:
 	Move tag earlier	Perkelti žymą anksčiau
 	Move tag later	Perkelti žymą vėliau
+	Tag form fields	Žymėti formos laukus
 	Mark as artifact	Pažymėti kaip artefaktą
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Pašalinkite šią lapo žymą iš skaitymo tvarkos ir pažymėkite jos tiesioginį turinį kaip artefaktą
 	Mark content as artifact	Pažymėti turinį kaip artefaktą
diff --git a/crates/ui-egui/src/i18n/pl.tsv b/crates/ui-egui/src/i18n/pl.tsv
index 017eff300..92a7a6d77 100644
--- a/crates/ui-egui/src/i18n/pl.tsv
+++ b/crates/ui-egui/src/i18n/pl.tsv
@@ -2353,6 +2353,7 @@ animation effects	Off	Wyłączone
 	This document is trying to open a local file:	Ten dokument próbuje otworzyć plik lokalny:
 	Move tag earlier	Przenieś znacznik wcześniej
 	Move tag later	Przenieś znacznik później
+	Tag form fields	Oznacz pola formularza
 	Mark as artifact	Oznacz jako artefakt
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Usuń ten znacznik liścia z kolejności odczytu i oznacz jego bezpośrednią zawartość jako artefakt
 	Mark content as artifact	Oznacz zawartość jako artefakt
diff --git a/crates/ui-egui/src/i18n/pt-br.tsv b/crates/ui-egui/src/i18n/pt-br.tsv
index 96645365d..60d2a8ef4 100644
--- a/crates/ui-egui/src/i18n/pt-br.tsv
+++ b/crates/ui-egui/src/i18n/pt-br.tsv
@@ -2387,6 +2387,7 @@ animation effects	Off	Desativados
 	This document is trying to open a local file:	Este documento está tentando abrir um arquivo local:
 	Move tag earlier	Mover tag para antes
 	Move tag later	Mover tag para depois
+	Tag form fields	Marcar campos de formulário
 	Mark as artifact	Marcar como artefato
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Remova esta tag folha da ordem de leitura e marque seu conteúdo direto como artefato
 	Mark content as artifact	Marcar conteúdo como artefato
diff --git a/crates/ui-egui/src/i18n/ru.tsv b/crates/ui-egui/src/i18n/ru.tsv
index 33b07021b..16486a256 100644
--- a/crates/ui-egui/src/i18n/ru.tsv
+++ b/crates/ui-egui/src/i18n/ru.tsv
@@ -2286,6 +2286,7 @@ animation effects	Off	Выкл
 	This document is trying to open a local file:	Этот документ пытается открыть локальный файл:
 	Move tag earlier	Переместить тег раньше
 	Move tag later	Переместить тег позже
+	Tag form fields	Пометить поля формы
 	Mark as artifact	Пометить как артефакт
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Удалите этот конечный тег из порядка чтения и пометьте его непосредственное содержимое как артефакт
 	Mark content as artifact	Пометить содержимое как артефакт
diff --git a/crates/ui-egui/src/i18n/sl.tsv b/crates/ui-egui/src/i18n/sl.tsv
index 5ac6ff694..cb4bda4e2 100644
--- a/crates/ui-egui/src/i18n/sl.tsv
+++ b/crates/ui-egui/src/i18n/sl.tsv
@@ -2378,6 +2378,7 @@ animation effects	Off	Izklopljeni
 	This document is trying to open a local file:	Ta dokument poskuša odpreti lokalno datoteko:
 	Move tag earlier	Premakni oznako prej
 	Move tag later	Premakni oznako pozneje
+	Tag form fields	Označi polja obrazca
 	Mark as artifact	Označi kot artefakt
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Odstranite to listno oznako iz vrstnega reda branja in označite njeno neposredno vsebino kot artefakt
 	Mark content as artifact	Označi vsebino kot artefakt
diff --git a/crates/ui-egui/src/i18n/te.tsv b/crates/ui-egui/src/i18n/te.tsv
index f154a1c98..bf4b5c26c 100644
--- a/crates/ui-egui/src/i18n/te.tsv
+++ b/crates/ui-egui/src/i18n/te.tsv
@@ -2286,6 +2286,7 @@ animation effects	Off	ఆఫ్
 	This document is trying to open a local file:	ఈ పత్రం ఒక స్థానిక ఫైల్‌ను తెరవడానికి ప్రయత్నిస్తోంది:
 	Move tag earlier	ట్యాగ్‌ను ముందుకు తరలించు
 	Move tag later	ట్యాగ్‌ను వెనుకకు తరలించు
+	Tag form fields	ఫారమ్ ఫీల్డ్‌లకు ట్యాగ్‌లు జోడించు
 	Mark as artifact	ఆర్టిఫాక్ట్‌గా గుర్తించు
 	Remove this leaf tag from reading order and mark its direct content as an artifact	ఈ లీఫ్ ట్యాగ్‌ను పఠన క్రమం నుంచి తీసివేసి, దాని ప్రత్యక్ష కంటెంట్‌ను ఆర్టిఫాక్ట్‌గా గుర్తించండి
 	Mark content as artifact	కంటెంట్‌ను ఆర్టిఫాక్ట్‌గా గుర్తించు
diff --git a/crates/ui-egui/src/i18n/tr.tsv b/crates/ui-egui/src/i18n/tr.tsv
index e3cc5e57b..3a54aa0c9 100644
--- a/crates/ui-egui/src/i18n/tr.tsv
+++ b/crates/ui-egui/src/i18n/tr.tsv
@@ -2369,6 +2369,7 @@ animation effects	Off	Kapalı
 	This document is trying to open a local file:	Bu belge yerel bir dosya açmaya çalışıyor:
 	Move tag earlier	Etiketi daha erken taşı
 	Move tag later	Etiketi daha geç taşı
+	Tag form fields	Form alanlarını etiketle
 	Mark as artifact	Yapıt olarak işaretle
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Bu yaprak etiketini okuma sırasından kaldırın ve doğrudan içeriğini yapıt olarak işaretleyin
 	Mark content as artifact	İçeriği yapıt olarak işaretle
diff --git a/crates/ui-egui/src/i18n/uk.tsv b/crates/ui-egui/src/i18n/uk.tsv
index 3098b03f6..bbf142029 100644
--- a/crates/ui-egui/src/i18n/uk.tsv
+++ b/crates/ui-egui/src/i18n/uk.tsv
@@ -2395,6 +2395,7 @@ animation effects	Off	Вимкнено
 	This document is trying to open a local file:	Цей документ намагається відкрити локальний файл:
 	Move tag earlier	Перемістити тег раніше
 	Move tag later	Перемістити тег пізніше
+	Tag form fields	Позначити поля форми
 	Mark as artifact	Позначити як артефакт
 	Remove this leaf tag from reading order and mark its direct content as an artifact	Вилучіть цей кінцевий тег із порядку читання та позначте його безпосередній вміст як артефакт
 	Mark content as artifact	Позначити вміст як артефакт
diff --git a/crates/ui-egui/src/i18n/vi.tsv b/crates/ui-egui/src/i18n/vi.tsv
index 7256df577..e3778fb43 100644
--- a/crates/ui-egui/src/i18n/vi.tsv
+++ b/crates/ui-egui/src/i18n/vi.tsv
@@ -2592,6 +2592,7 @@ key	End	End
 key	Space	Space
 	Move tag earlier	Chuyển thẻ lên trước
 	Move tag later	Chuyển thẻ ra sau
+	Tag form fields	Gắn thẻ các trường biểu mẫu
 	Only allow this if you trust the source document.	Chỉ cho phép nếu bạn tin tưởng tài liệu nguồn.
 	Open this local PDF?	Mở PDF cục bộ này?
 	This document is trying to open a local file:	Tài liệu này đang cố mở một tệp cục bộ:
diff --git a/crates/ui-egui/src/i18n/zh-hans.tsv b/crates/ui-egui/src/i18n/zh-hans.tsv
index ba337bae7..978c319ea 100644
--- a/crates/ui-egui/src/i18n/zh-hans.tsv
+++ b/crates/ui-egui/src/i18n/zh-hans.tsv
@@ -2337,6 +2337,7 @@ animation effects	Off	关
 	This document is trying to open a local file:	此文档正尝试打开本地文件：
 	Move tag earlier	将标签前移
 	Move tag later	将标签后移
+	Tag form fields	标记表单字段
 	Mark as artifact	标记为工件
 	Remove this leaf tag from reading order and mark its direct content as an artifact	从阅读顺序中移除此叶标签，并将其直接内容标记为工件
 	Mark content as artifact	将内容标记为工件
diff --git a/crates/ui-egui/src/i18n/zh-hant.tsv b/crates/ui-egui/src/i18n/zh-hant.tsv
index 6884a6aad..3620b394e 100644
--- a/crates/ui-egui/src/i18n/zh-hant.tsv
+++ b/crates/ui-egui/src/i18n/zh-hant.tsv
@@ -2249,6 +2249,7 @@ animation effects	Off	關
 	This document is trying to open a local file:	此文件正嘗試開啟本機檔案：
 	Move tag earlier	將標記前移
 	Move tag later	將標記後移
+	Tag form fields	標記表單欄位
 	Mark as artifact	標記為成品
 	Remove this leaf tag from reading order and mark its direct content as an artifact	從閱讀順序中移除此葉標記，並將其直接內容標記為成品
 	Mark content as artifact	將內容標記為成品
diff --git a/crates/ui-egui/tests/accessibility.rs b/crates/ui-egui/tests/accessibility.rs
index e90b2dcf2..484bc52c6 100644
--- a/crates/ui-egui/tests/accessibility.rs
+++ b/crates/ui-egui/tests/accessibility.rs
@@ -18,6 +18,14 @@ endstream endobj
 trailer << /Root 1 0 R >>
 %%EOF";
 
+const FORM_FIXTURE: &[u8] = b"%PDF-1.7
+1 0 obj << /Type /Catalog /Pages 2 0 R /AcroForm << /Fields [4 0 R] >> >> endobj
+2 0 obj << /Type /Pages /Kids [3 0 R] /Count 1 >> endobj
+3 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 200 100] /Annots [4 0 R] >> endobj
+4 0 obj << /Type /Annot /Subtype /Widget /FT /Tx /T (Name) /Rect [20 40 120 60] /P 3 0 R >> endobj
+trailer << /Root 1 0 R >>
+%%EOF";
+
 fn status(h: &Harness<'static, PdfCraftApp>, rule: Rule) -> Status {
     h.state().a11y.report.as_ref().unwrap().1.result(rule).unwrap().status
 }
@@ -210,6 +218,28 @@ fn a_saved_page_range_past_the_document_still_checks_its_pages() {
     assert_eq!(h.state().a11y.options.as_ref().and_then(|o| o.pages.clone()), Some(vec![0]));
 }
 
+#[test]
+fn tagging_form_fields_opens_the_tags_panel() {
+    let mut h = Harness::builder().with_size(egui::vec2(1400.0, 900.0)).build_eframe(move |_cc| {
+        let mut app = PdfCraftApp::new();
+        app.set_option("language", "en").unwrap();
+        app.open_bytes("form.pdf", None, FORM_FIXTURE.to_vec()).unwrap();
+        app
+    });
+    h.run_steps(3);
+    assert!(h.state_mut().execute("a11y.autotag_fields"));
+    h.run_steps(3);
+    assert_eq!(h.state().right, Some(RightPanel::Tags));
+    let id = h.state().views[0].id;
+    let report = h
+        .state()
+        .session
+        .get(id)
+        .unwrap()
+        .accessibility_check(&pdfcraft_engine::a11y::Options { rules: [Rule::TaggedFormFields].into(), pages: None });
+    assert_eq!(report.unwrap().result(Rule::TaggedFormFields).unwrap().status, Status::Passed);
+}
+
 /// Two tagged figures: an image without alternate text and a bar (role-mapped Photo) with.
 const FIGURES: &[u8] = b"%PDF-1.7
 1 0 obj << /Type /Catalog /Pages 2 0 R /MarkInfo << /Marked true >> /StructTreeRoot 5 0 R >> endobj
diff --git a/docs/gaps.md b/docs/gaps.md
index 9163b1bf4..c006e48d2 100644
--- a/docs/gaps.md
+++ b/docs/gaps.md
@@ -198,8 +198,10 @@ update the numbers.
 
 ### 11. Accessibility: only text-only automatic structure creation
 
-- **Missing:** auto-tag mixed text, images, tables, lists, links and fields; connect preview heading
-  proposals to Apply; visual Order and Content panels, Reading Order tool, table editor, Make Accessible action,
+- **Missing:** apply auto-tag proposals to marked content and a valid parent tree, tag fields
+  into structure trees with unusual layouts (only a direct Document root with a direct
+  ParentTree Nums array is extended),
+  visual Tags, Order and Content panels, Reading Order tool, table editor, Make Accessible action,
   Read Out Loud; full keyboard operation of PdfCraft itself and a screen-reader audit.
 - **Evidence:** all 32 checker rules, figure alt text, tag property and sibling order edits, and
   a bounded auto-tag preview exist. Apply writes valid structure and parent-tree links for
diff --git a/parity/acrobat-features.toml b/parity/acrobat-features.toml
index 338e2b1aa..e98ab7db1 100644
--- a/parity/acrobat-features.toml
+++ b/parity/acrobat-features.toml
@@ -8876,11 +8876,11 @@ title = "Autotag form fields"
 area = "M"
 tier = "P1"
 milestone = "M12"
-status = "planned"
-commands = []
-tools = []
-evidence = []
-notes = ""
+status = "partial"
+commands = ["a11y.autotag_fields"]
+tools = ["accessibility_autotag_form_fields"]
+evidence = ["crates/a11y/src/tests.rs::autotag_form_fields_writes_widget_structure_and_parent_tree", "crates/automation/tests/automation.rs::autotag_form_fields_writes_reviewable_widget_tags"]
+notes = "For an untagged AcroForm, writes Form structure elements, OBJR references, widget StructParent keys and ParentTree entries. An existing tree is extended when its root points directly to a Document element and its ParentTree uses a direct Nums array; other layouts are refused before any edit. A widget listed on several pages is tagged once. Text, figures, links and other content remain untagged."
 
 [[feature]]
 id = "a11y.reading-order-tool"