6e73fe40e3
* Layout: place floating pictures and shapes the way Word does Pictures and shapes anchored in a .docx often landed in the wrong place: the reader folded every margin-relative position into "margin", ignored <wp:align>, and kept only distL as the distance from text. Floats in headers, footers and table cells were not drawn at all. Document model (doc): - Anchor gains the left/right/top/bottom/inside/outside margin areas, the anchor character and the anchor line - Float gains h_align/v_align (FloatAlign: start, center, end, inside, outside), which take precedence over the offsets, and separate dist_top/dist_bottom (dist stays the left/right distance) DOCX (docx): read and write wp:align, every relativeFrom value and distT/distB/distL/distR. Layout (layout): - float_rect positions against each reference area, with alignment - floats in headers, footers, table cells and text boxes are placed, drawn (behind-text ones under the text) and wrapped around; headers and footers get a page frame so page-relative floats land in page coordinates, also when the header's height is measured for the body top - a paragraph's first line pushed below a top-and-bottom float is drawn (and hit-tested) where it was laid out - floats follow their paragraph to a new column or page, and are placed at the paragraph's actual top (space before counted once, contextual spacing respected) - wrap areas use each distance as given; the old 9pt minimum is gone, so a float with distance 0 now touches its text as in Word - a list item's label is counted once (Ctx::next_label) and passed into every layout of its paragraph (Ctx::para_labelled), so laying it out again around floats doesn't advance the list counters twice; a paragraph whose top moved is only laid out again when the page has something to wrap around Engine: switching an inline object to a wrapping style gives it Word's default 9pt side distance; the position presets clear any alignment. Approximations: inside/outside margins and alignments ignore mirrored margins (treated as left/right); character- and line-relative positions fall back to the column and the paragraph top. Tests: docx fixture and round trip for alignment, reference areas and distances; layout tests for alignment, the pushed-down first line, floats moving to page two (with space before), header and cell floats, header floats not changing the body top, hostile distances, and list items counted once when laid out again (contextual spacing, page break before, beside a float in a table cell). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * Tables: place a table's edge by the document's Word compatibility mode Word 2013 and later (compatibilityMode 15) put a left-aligned table's border at the margin plus its indent, moved in by half the first cell's left border; earlier modes line the first cell's text up with the margin instead, the border one cell margin further out. We always did the latter, so in Word 2013+ documents (43% of docxide-pdf's Word reference corpus) every table and its text sat a cell margin (usually 5.4pt) too far left. Settings::compat_mode keeps the document's mode: read from w:compat/w:compatSetting, 12 when a document has no settings or doesn't state one (as Word treats it), 15 for new documents, and written back instead of a fixed 15. The legacy shift now uses the first cell's own left margin. Measured against docxide-pdf's corpus (365 documents, same open fonts): mean SSIM 40.4% -> 42.1%, documents passing SSIM 40 -> 50, passing ink overlap 142 -> 154; 71 documents better, 6 worse (tables nested in a cell whose text Word puts at the outer cell's edge, which docxide-pdf doesn't match either). Tests: a mode-15 table's text sits a cell margin and half a border inside the margin, a mode-12 table's at it; the mode round-trips through .docx and defaults to 12 without settings. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * Layout: floating tables (w:tblpPr) stand at their position, text wraps Floating tables were read as ordinary tables: laid out in the text flow with no regard to their position, and the text after them waited below instead of running beside them. 71 of the 382 documents in docxide-pdf's Word reference corpus have them, typically forms anchored to the text and the margin. TableProps::float (TableFloat) keeps w:tblpPr and w:tblOverlap: what x and y are measured from (column, margin or page; text, margin or page), offsets or alignments, distances from text and whether it may overlap other floating tables. The .docx reader and writer carry it. A floating table at the top level of the body is placed at its position (tblpY below the text where it stands, by default) and takes no room in the flow; its area plus its distances from text joins the page's wrap areas, so the following text runs beside it or below it. One that may not overlap moves below the floating tables in its way, keeping (in Word 2013+ layout) its distance from the text's left edge; in earlier modes an offset places the first cell's text, as an indent does. A table in the flow starts below the floating objects in its way. Floating tables inside table cells and headers are still laid out in their flow. Measured against docxide-pdf's corpus (365 documents, same open fonts), on top of the compatibility-mode commit: mean SSIM 42.1% -> 43.9%, mean line-break agreement 63.5% -> 66.6%, documents passing SSIM 50 -> 55, page count right 303 -> 305; 33 documents better, 4 worse by at most 3.1 points. Tests: a full-width and a narrow floating table that may not overlap stack, the narrow one keeping 9pt from the text edge, and the next paragraph runs beside it; floating table positions round-trip through .docx. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * Layout: a floating table taller than a page runs across pages A floating table was always placed whole at its position, so one taller than the page's body ran past the bottom margin and its rows were lost: a Bulgarian programme whose whole body is one floating table came out as 3 pages instead of Word's 6. Such a table now flows across pages like a table in the text (rows splitting and header rows repeating as usual), from the floating table's own left edge; the position is worked out by float_table_x, which the whole-table placement shares. In docxide-pdf's Word reference corpus that document has Word's page count again with all its rows; nothing else changes. Test: an 80-row floating table runs onto a second page, every row drawn above the bottom margin from the table's left edge (was one page). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * Tidy floating-table code: one alignment helper, named steps, shared mappings No change in behaviour; makes the floating-table code easier to read. - FloatAlign::from_ooxml/ooxml (added with floating pictures) replace the copies of the same mapping in the w:tblpPr reader and writer, and TableFloat::dist_from_text the copies of its clamping. - place_floating_table and float_table_x place by offset or alignment with align_in, like floating pictures do, instead of their own copies. - The overlap rule uses Rect::inset/intersects and names its condition (keeps_text_distance) instead of a one-line chain of comparisons. - below_floats names the step that starts a table in the flow below the floating objects in its way. - The floating-table functions move next to place_table, which calls them, from after `mod tests;` at the end of the file. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Oliver Zieschang <4963183+naxvog@users.noreply.github.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Co-authored-by: Brandon Thomas <echelon@gmail.com>
WordCraft
Writing and document design; an open-source, clean-room reimplementation of Microsoft Word, rebuilt in pure Rust.
A fast, open-source word processor with the Word workflow you already know: the ribbon, styles,
tables, track changes, references and mail merge. It reads and writes .docx, runs natively on
macOS, Windows, Linux and BSD, and in the browser via WebAssembly.
By the ArtCraft team.
WordCraft on getartcraft.com · ArtCraft · All Crafting Apps
The Open Studio Handbook, WordCraft's built-in sample: the ribbon, live Styles gallery, rulers and the Navigation pane.
Note
ArtCraft is a community of artists from all walks of life. Painters, photographers, filmmakers, illustrators, designers, animators, hobbyists, and people who picked up a pencil last week. If you make things, you're one of us. Come say hi on Discord.
A tour · Why WordCraft · What works today · Quick start · For agents · Architecture · Roadmap · Downloads · The Crafting Apps · License and credits
A tour
Every screenshot below is WordCraft itself, rendered offscreen by its own UI test harness
(cargo run -p wordcraft-ui-egui --example ui_shot).
 Review. Track changes, comment balloons in the margin, accept and reject, spelling and grammar as you type. |
 References. Tables of contents, footnotes, citations in APA, MLA, Chicago or IEEE, index and captions. |
 Design. Themes, style sets, paragraph spacing, watermarks, page colour and borders. |
 Dark mode with formatting marks, and the Insert tab: tables, pictures, shapes, links, headers, footers, fields and symbols. |
 Layout. Drop caps, text wrapping around pictures and shapes, automatic hyphenation, line numbers and page borders. |
|
 File. Start from a template, open recent documents, edit properties, export to PDF and other formats. |
|
Why WordCraft
- Familiar. Word's ribbon tabs, groups, shortcuts and behaviour: Enter continues a list, Tab demotes it, Ctrl/⌘+B bolds the word under the caret, the Styles gallery previews styles live, F4 repeats, F7 checks spelling, F8 extends the selection.
- Your files. Opens and saves .docx (OOXML), and also .odt, .rtf, .html, .md, .tex (LaTeX), .txt; exports PDF with real, selectable text, links and bookmarks.
- Fast. Paragraph layout is cached, so typing in a 188-page document re-lays it out in about 1.4 ms; pages render on demand.
- Everywhere. One Rust codebase for macOS, Windows, Linux, BSD and the web. No Electron, no Tauri: native egui on the GPU.
- Built for agents. Every action is a command with an id. The same 389 commands drive the ribbon, keyboard shortcuts, the command search, a command-line tool, a JSON control channel and an MCP server.
- Private. Spelling, grammar and everything else work offline.
- Open. MIT OR Apache-2.0. Clean-room: built from public specifications and observation, with every asset original or openly licensed.
What works today
| Area | Highlights |
|---|---|
| Writing | Fast typing with IME, smart quotes, AutoCorrect, list autoformat (* , 1. ), dashes; word, sentence, paragraph selection; drag-select; clipboard with formatting; undo/redo; find and replace with regex |
| Formatting | Fonts, sizes, bold/italic/underline styles, strike, sub/superscript, caps, highlight, colours, character spacing, Format Painter, Change Case, Clear Formatting |
| Paragraphs | Alignment, indents (draggable on the ruler), spacing, line spacing, tabs with leaders, borders, shading, keep with next, widow/orphan control |
| Styles | Built-in style set, live gallery, Styles pane, create/modify/update styles, style sets, themes |
| Lists | Bullets, numbering, multilevel, restart, set value, custom formats |
| Tables | Insert by grid, merge/split, styles with banded rows, borders, shading, header rows repeated across pages, rows that split across pages, sort, formulas, text ↔ table |
| Pages | Margins, orientation, size, columns, page/column/section breaks, headers and footers (first page, odd/even), page numbers, watermark, page borders, line numbers, vertical alignment, drop caps, automatic hyphenation |
| Objects | Pictures (resize, crop, recolour, brightness/contrast, transparency, background removal, picture styles, rotate), shapes, text boxes, floating position with text wrapping (square, top and bottom, behind or in front of text) |
| References | Table of contents, footnotes and endnotes, citations and bibliography (APA, MLA, Chicago, IEEE), captions, table of figures, cross-references, index, table of authorities |
| Review | Spelling and grammar with suggestions, thesaurus, word count, comments in margin balloons or a pane, track changes, accept/reject, compare documents, restrict editing, accessibility checker, document inspector |
| Mailings | Mail merge from CSV, merge fields, address block, greeting line, rules, preview, finish to a document; envelopes and labels |
| View | Print layout, web layout, draft, read mode, focus, zoom, one/multiple pages, page width, Navigation pane, rulers, gridlines, dark mode; interface in English, 简体中文, 繁體中文, 日本語, Português (Brasil) or Español (follows the system language by default) |
| Files | .docx read/write (opens in Word), PDF export, .odt, .rtf, .html, .md, .tex, .txt import/export, page images |
The honest picture, area by area, is in ROADMAP.md and the generated feature parity report.
Quick start
git clone https://github.com/storytold/wordcraft
cd wordcraft
cargo run --release -p wordcraft -- --sample # the desktop app with the sample document
cargo run --release -p wordcraft -- report.docx # open a document
Command line:
wordcraft-cli convert report.docx report.pdf # docx, pdf, odt, rtf, html, md, tex, txt, png
wordcraft-cli text report.docx # plain text
wordcraft-cli inspect report.docx # structure as JSON
wordcraft-cli run --template sample \
--cmd 'select.text={"text":"Membership"}' --cmd format.bold --save out.docx
Web: cd apps/wordcraft-web && trunk serve, then open http://127.0.0.1:8771/?sample.
For agents: CLI and MCP
WordCraft was designed to be driven by people and by AI agents.
claude mcp add wordcraft -- wordcraft-cli mcp # headless documents
wordcraft --control 7981 & # or drive the running app…
claude mcp add wordcraft-app -- wordcraft-cli mcp --connect 127.0.0.1:7981
Tools include list_commands, execute, batch, type_text, select_text, inspect_document,
render_page, save_document, and, with a running app, screenshot, click and key. Agents
can check their work through inspect_document without screenshots. See docs/mcp.md
and the control protocol. Macros record any sequence of commands and
play it back (tools.recordMacro, tools.macros).
Logs
The desktop app writes its log records to standard error and to logs/wordcraft.log next to its
preferences: on Linux $XDG_CONFIG_HOME/wordcraft/logs/ (by default ~/.config/wordcraft/logs/),
on macOS ~/Library/Application Support/WordCraft/logs/, on Windows %APPDATA%\WordCraft\logs\.
A start from a desktop menu or the Dock has no terminal, so this file is what to attach to a bug
report: unreadable parts of a .docx, pictures or fonts a PDF export had to leave out and panics the
command guard recovered from land there. Each launch moves the previous log to wordcraft.1.log
(and that one to wordcraft.2.log), so the log of a run that crashed survives the next start; a
log stops growing at 16 MiB. --version writes no file, and runs with WORDCRAFT_NO_PREFS (agents'
test runs) log to standard error only. Document text is never logged; a panic message leaves out
the text it quotes.
By default WordCraft's own crates log at info and everything else at warn. RUST_LOG replaces
that with env_logger-style directives, for example RUST_LOG=debug,
RUST_LOG=warn,wordcraft_docx=trace or RUST_LOG=info,wgpu_core=warn; a directive ending in *
covers every target starting with it (wordcraft*=debug). The logger is
apps/wordcraft/src/logging.rs.
Architecture
| Layer | Crate | Job |
|---|---|---|
| L0 | wordcraft-geom |
units and measurements |
| L1 | wordcraft-doc, wordcraft-fonts, wordcraft-proof |
document model and editing; fonts and shaping; spelling, grammar, hyphenation |
| L2 | wordcraft-layout, wordcraft-docx, wordcraft-formats |
line breaking, pagination, tables, notes, hit testing; OOXML; ODT/RTF/HTML/Markdown/TXT |
| L3 | wordcraft-render, wordcraft-pdf |
rasteriser (vello_cpu); PDF (krilla) |
| L4 | wordcraft-engine |
session, undo, 389 commands, Word feature catalog |
| L5 | wordcraft-mcp |
MCP server |
| L6 | wordcraft-ui-egui |
the Word-style front end (swappable) |
| apps | wordcraft, wordcraft-cli, wordcraft-web |
desktop, command line, browser |
cargo xtask ci runs formatting, clippy, ~250 tests, the asset-attribution check, the layering
check and the wasm build. Contributor and agent instructions: AGENTS.md.
Roadmap
WordCraft covers 87% of Word's ribbon features with commands today; counting depth and fidelity, we estimate about 62% of real feature parity. An alpha for everyday writing is close: the remaining work is mostly testing against real-world .docx files, native printing and the first signed builds. Charts, SmartArt, the equation editor and the Draw tab come after. Details and estimates: ROADMAP.md.
Downloads
Download WordCraft from GitHub: the latest release has every build listed below, and all releases has earlier versions and their notes. <ver> in the file names is the version number, and SHA256SUMS.txt lists a checksum for every file.
Windows
| Build | Installer | Portable |
|---|---|---|
| x64 (64-bit Intel/AMD) | wordcraft-<ver>-windows-x64.msi |
wordcraft-<ver>-windows-x64-portable.zip |
| arm64 (Snapdragon and other ARM PCs) | wordcraft-<ver>-windows-arm64.msi |
wordcraft-<ver>-windows-arm64-portable.zip |
| x86 (32-bit) | wordcraft-<ver>-windows-x86.msi |
wordcraft-<ver>-windows-x86-portable.zip |
Installers and executables are code-signed.
If the app doesn't open on Windows: the desktop app initializes only DirectX 12 by default.
Letting wgpu also create an OpenGL instance can crash some graphics drivers (AMD's
atio6axx.dll) before the window appears, so the app would flash in Task Manager and quit.
WGPU_BACKEND overrides the default for troubleshooting (for example dx12 or vulkan). In
PowerShell, from the folder containing the executable:
$env:WGPU_BACKEND = "vulkan"
& .\wordcraft.exe
Remove-Item Env:WGPU_BACKEND # restore the default for later launches
An explicit gl override can bring the driver crash back on affected systems. The macOS, Linux
and web backend defaults are unchanged.
macOS
| Build | File | Notes |
|---|---|---|
| App, universal (Apple silicon + Intel) | wordcraft-<ver>-macos-universal.dmg |
Signed and notarized |
| Command-line tool, universal | wordcraft-cli-<ver>-macos-universal.zip |
Signed and notarized |
Linux
| Format | x86_64 | aarch64 (ARM64) | Notes |
|---|---|---|---|
| AppImage | wordcraft-<ver>-linux-x86_64.AppImage |
wordcraft-<ver>-linux-aarch64.AppImage |
Runs anywhere; updates itself with AppImageUpdate (.zsync files) |
| Flatpak | wordcraft-<ver>-linux-x86_64.flatpak |
wordcraft-<ver>-linux-aarch64.flatpak |
Sandboxed; flatpak install --user <file> |
| Debian/Ubuntu | wordcraft-<ver>-linux-x86_64.deb |
wordcraft-<ver>-linux-aarch64.deb |
|
| Fedora/RHEL/openSUSE | wordcraft-<ver>-linux-x86_64.rpm |
wordcraft-<ver>-linux-aarch64.rpm |
|
| Tarball | wordcraft-<ver>-linux-x86_64.tar.gz |
wordcraft-<ver>-linux-aarch64.tar.gz |
Unpack anywhere |
FreeBSD
| Build | File |
|---|---|
| x86_64 | wordcraft-<ver>-freebsd-x86_64.tar.gz |
Web (WebAssembly)
| Build | File | Notes |
|---|---|---|
| Static site | wordcraft-web-<ver>.zip |
Runs in a modern browser; host it on any static server |
The Crafting Apps
WordCraft is one of the Crafting Apps: free, open-source creative tools from the ArtCraft team, each written from scratch in Rust and each able to stand on its own.
| App | What it's for | Code | Learn more | |
|---|---|---|---|---|
 |
PhotoCraft | Image editing: layers, masks, type and real PSD files | GitHub | Website |
 |
VectorCraft | Vector illustration | GitHub | Website |
 |
FilmCraft | Video editing, color and sound | GitHub | Website |
 |
LightCraft | Photo library and raw development | GitHub | Website |
 |
PdfCraft | Reading, organizing and protecting PDFs | GitHub | Website |
 |
EffectCraft | Motion graphics and visual effects | GitHub | Website |
 |
DesignCraft | Page layout and publishing | GitHub | Website |
 |
WordCraft | Writing and document design · you are here | GitHub | Website |
And ArtCraft itself, our AI image and video studio for artists who want real control.
Come make things with us
Our Discord is where artists of every kind hang out: people who paint, shoot, draw, cut film, set type, and people still figuring out what they like to make. Share what you're working on, ask for help, tell us what's broken, or tell us what you wish these tools could do. Whatever your medium and however long you've been at it, you're welcome here.
discord.gg/artcraft · getartcraft.com · The Crafting Apps · WordCraft
License and credits
WordCraft is dual-licensed under MIT or Apache-2.0, at your option. Copyright (c) 2026 ArtCraft Team and the WordCraft contributors. Required notices are in NOTICE.
Bundled fonts, icons, images and other assets keep their own open licenses; each one is listed with its author, source and license in ATTRIBUTION.md.
The spelling dictionary and hyphenation come from Grady Ward's public-domain Moby Hyphenator II word list. The sample documents and templates are original text written for WordCraft.
The ArtCraft name, wordmark and logos in docs/brand/ are trademarks of the
ArtCraft Team and are not covered by this license. They may be used only unmodified, and only as
part of this repository and WordCraft, under docs/brand/LICENSE-brand.txt.
Forks and modified versions must remove them.
Microsoft and Microsoft Word are trademarks of the Microsoft group of companies. Adobe, Photoshop, Illustrator, Premiere Pro, Lightroom, Acrobat, After Effects and InDesign are trademarks or registered trademarks of Adobe Inc. in the United States and/or other countries. WordCraft is an independent, open-source project and is not affiliated with, sponsored by or endorsed by Microsoft Corporation or Adobe Inc.; these names are used only to describe the workflows it is compatible with.
Made by the ArtCraft team and community.