> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-11 · **Change:** trivial (symbol-font text exported as Unicode, #776; previously trivial: text-box margins, Resize shape to fit text and freeforms in groups, #743; previously trivial: formatted paste from the system clipboard's HTML and RTF, #687; previously trivial: independent complex-script formatting inheritance and round-trip regression tests; previously trivial: import/export fixes for TXT, RTF, ODT, HTML and LaTeX, #433–#440; previously major: first version; every format Word reads or writes, measured from the readers and writers on origin/main) · **Target:** Microsoft Word (Microsoft 365) for Mac 16.113.4, plus Word for Windows' extra formats
| `.doc` Word 97-2003 (and `.dot`) | 8% | R/W | 🟡 | ❌ | ~60% | 25–40 | `crates/docbin/src/tests.rs`, `tests/drawing.rs` (56) | Spec-based reader ([MS-DOC]): text, formatting, styles, sections, headers/footers, tables, lists, notes, fields, bookmarks; inline and floating pictures (PNG, JPEG, DIB, TIFF, EMF, WMF; Macintosh PICT as a sized placeholder) with crop, alt text, position and wrap; basic shapes, lines, groups and text boxes ([MS-ODRAW]). Freeform shapes, z-order and Word 6/95 or encrypted files are dropped or refused. No writer |
| PDF export | 8% | W | — | ✅ | ~80% | 6–10 | `crates/pdf/src/tests.rs` | krilla: embedded subsets, selectable text incl. field results (#133), links, outline, tagging. Fonts it can't subset become outlines (#132). Print Markup (#589): comments in balloons beside each page (scaled to its paper) and tracked changes; HTML/Markdown/text copies end with a comment list. No PDF/A option, no "best for printing/online" choice |
| PDF open (PDF Reflow, Word for Windows) | 1% | R | ❌ | — | 0% | 30–50 | — | Converting a PDF into an editable document. A sibling app (PdfCraft) may supply the parser |
| `.rtf` Rich Text Format | 3% | R/W | 🟡 | 🟡 | ~50% | 10–15 | `crates/formats/src/tests.rs` | ~1,500 lines: text, character/paragraph formatting, styles, lists, tables, pictures (`\shppict`, #154), fields, bookmarks. 8-bit text in the document's code page (`\ansicpg`) or the current font's (`\fcharset`, `\cpg`): Cyrillic, Central European, Greek, Turkish, Hebrew, Arabic, Baltic, Vietnamese, Thai (was Windows-1252 only). Pasted from the system clipboard where the platform offers it (Windows, Wayland) when there is no HTML (#687). Thin: comments, notes, revisions, sections, RTL |
| `.txt` Plain text | 2% | R/W | ✅ | ✅ | ~95% | 1–2 | unit tests | Encoding detection. Files with other extensions (`.m3u`/`.m3u8` playlists, logs, config files, no extension) open as text when they are text, Word and RTF files by their signature; binary files are refused (#569). A Word or RTF extension that contradicts the content also opens by signature, as in Word: RTF saved as `.doc` (hh.ru résumés, accounting exports), a `.docx` renamed `.doc`, a Word 97-2003 file renamed `.docx`. Word's encoding choice dialog and line-ending options missing; such files save only through Save As |
| `.htm/.html` Web Page and Web Page, Filtered | 1% | R/W | 🟡 | 🟡 | ~60% | 6–10 | `crates/formats/src/tests.rs` | Tables (#102), relative pictures embedded (#113), missing `</head>` tolerated (#154). No Word "Web Page" (with `_files` folder) round-trip. The same reader takes HTML from the system clipboard: Paste keeps another program's formatting (a Word document, a web page; Windows' "HTML Format" header understood), Merge Formatting keeps its emphasis (#687) |
| `.xml` Word XML Document (Flat OPC) | <1% | R/W | ✅ | ✅ | ~65% | — | `crates/docx/tests/word_xml.rs`, `roundtrip.rs` (`flat_opc_round_trip_equals_docx`) | The DOCX package in one XML file, read and written by the DOCX code (#548); File › Export › Word XML Document. `.xml` files are told apart by their root element |
| `.xml` Word 2003 XML (WordprocessingML 2003) | <1% | R/W | 🟡 | ❌ | ~55% | 2–3 | `crates/docx/tests/word_xml.rs` | Opened by rewriting it as a package for the DOCX reader (#548): styles, default fonts, lists, tables, sections, headers/footers, footnotes/endnotes, comments, bookmarks, tracked insertions/deletions, hyperlinks, `w:binData` pictures, document properties. Not read: formatting changes, `w:docPr` settings, smart tags. Saving as 2003 XML is not planned (legacy) |
| `.xlsx`/`.xlsm`/`.ods` as a mail-merge recipient list | — | R (data source) | ✅ | — | ~90% | 1–3 | `crates/formats/src/sheet.rs`, `cmd/mailings.rs` | Read-only, one sheet's cell values (#334): shared/inline/rich strings, numbers, booleans, cached formula results, dates and times as ISO 8601 (`yyyy-mm-dd`) from the cell's number format, sparse cells; ODS value types, repeated rows/columns, covered cells. Select Table picks the sheet. Capped (64 MiB per part, 100,000 rows, 1,000 columns, 2 M cells, 32,767 characters a cell). Not shown: number formats other than dates (currency, percent, thousands separators) in `.xlsx`; no `.xls`, Access or Outlook sources |
| Text, runs, paragraph and character properties, styles, numbering, sections | ✅ | ✅ | Including complex-script props (`w:rtl`, `w:cs`, `w:szCs`, `w:bCs`…), East Asian fonts kept apart from Latin (#111); independent complex-script formatting inherited through defaults/styles and preserved over repeated saves (`complex_script_inheritance.rs`), indents in characters (`w:firstLineChars`, `w:hangingChars`, `w:leftChars`, `w:rightChars`, #534); every ST_NumberFormat value of `w:numFmt` is kept on save, Chinese/Japanese/Korean, enclosed and full-width formats are drawn, the rest (Hebrew, Arabic, Hindi, Thai…) show decimal (#534). `w:beforeLines`/`w:afterLines` not kept (the points are) |
| Footnotes, endnotes, comments | ✅ | ✅ | The document's own note separators and continuation notice (`w:type``separator`, `continuationSeparator`, `continuationNotice`) round-trip as ids -1, 0 and 1 (#352); note options (`w:pos`, `w:numFmt`, `w:numStart`, `w:numRestart`) round-trip in the settings and in each `w:sectPr` (#385); `commentsExtended` written; `commentsIds`, modern threaded comments (`w16cex`) partly |
| Formatting revisions (`w:rPrChange`, `w:pPrChange`, `w:sectPrChange`, `w:tblPrChange`, `w:trPrChange`, `w:tcPrChange`, `w:numberingChange`) | ✅ | ✅ | #41: kept on open and save, schema order (change element last); changes inside `styles.xml` are dropped. RTF/ODT ignore them |
| Move tracking (`w:moveFrom`/`w:moveTo`, `w:moveFromRangeStart/End`, `w:moveToRangeStart/End`), moved paragraph marks | ✅ | ✅ | #400: both ends linked by the range name; ranges rewritten around each moved stretch (ids renumbered); a move missing an end or a range end opens as a plain deletion/insertion. RTF/ODT/PDF export the result (moved-away text hidden like deletions) |
| Fields (`w:fldChar`, `w:fldSimple`), TOC, cross-references, `ADDIN` citations | ✅ | ✅ | Field codes Word supports but we don't evaluate keep their cached result. Imported TOCs preserve actual result boundaries, formatted entries and nested fields without relying on TOC styles. `EQ \o` (overstrike, enclosed characters) is drawn; enclosed characters are written as Word stores them, their style in the code's run sizes (#297); a cached picture (`INCLUDEPICTURE`) stays as the content of a range field (#465) |
| Restrict Editing (`w:documentProtection` edit/formatting/enforcement and password hash, `w:locked` styles, `w:permStart`/`w:permEnd` exceptions) | ✅ | ✅ | #412: SHA-512 hash with salt and spin count written; Word's legacy `w:cryptAlgorithmSid`/`w:hash` form (SHA-1/-256/-384/-512, ECMA-376 Part 4 §14.8.1) is kept and verified; MD2/MD4/MD5, `w:algIdExt` and other unsupported forms are refused, never unlocked; `w:colFirst`/`w:colLast` table-column ranges read as plain ranges |
| DrawingML pictures inline and anchored (`wp:anchor`), wrap square/tight/through/top-bottom | ✅ | ✅ | Tight/through read and written with their `wp:wrapPolygon` (and `edited`); without one, a shape's outline is written (a picture's rectangle). `wrapText` (both sides, left, right, largest) read and written for square, tight and through |
| DrawingML shapes and text boxes (`wps:`) | ✅ | ✅ | Preset geometries subset (callouts and flowchart boxes drawn as the nearest shape, #611); fill and outline from the shape or from the theme through its style references (`a:fillRef`/`a:lnRef`, #611), scheme, preset, system, scRGB and HSL colours; rotation and flips (`a:xfrm``rot`/`flipH`/`flipV`, pictures and groups too, #332), the effect extent covering the rotated bounds; `wps:bodyPr``vert` and `anchor`, internal margins (`lIns`/`tIns`/`rIns`/`bIns`) and Resize shape to fit text (`a:spAutoFit`: the text is never cut, #743), linked text boxes (`wps:txbx/@id`, `wps:linkedTxbx``id`/`seq`, #369); text warps (`a:prstTxWarp` with adjust values, all 41 presets kept; unknown ones dropped), connectors (`straightConnector1`, `bentConnector2`–`5`, `curvedConnector2`–`5` read; 3-segment forms written) with glued ends (`wps:cNvCnPr``a:stCxn`/`a:endCxn`; the glued shapes keep their drawing ids) and arrowheads (`a:headEnd`/`a:tailEnd`, drawn as triangles) (#416) |
| Freeform shapes (`a:custGeom`: `a:moveTo`, `a:lnTo`, Bézier curves flattened) and WordCraft ink | ✅ | ✅ | Ink is written as a freeform `wps:wsp` in a `wp:anchor` (round caps, alpha for highlighter) and recognised again by its drawing name (#307). It is saved as a custom-geometry shape, not as Word's own ink (InkML in `w14:contentPart`), so Word shows WordCraft ink as a freeform shape it can move and recolour but not erase with its ink eraser; arcs drawn straight |
| Group shapes (`wpg:`), drawing canvas (`wpc:`) | ✅ | ✅ | Groups (#267) and canvases (#344) with pictures, shapes, freeforms (custom geometry, #743) and text boxes; nested groups flattened. The canvas schema has no transform, so a turned or flipped canvas keeps its turn in our own `wpc:extLst` extension (`urn:wordcraft:canvas-xfrm`; Word shows it unturned). Legacy VML canvases (`v:group editas="canvas"`) aren't read as canvases |
| Alt text of drawings (`wp:docPr`/`cNvPr``descr` and `title`, decorative mark `adec:decorative` from [MS-ODRAWXML]) and tables (`w:tblCaption`, `w:tblDescription`) | ✅ | ✅ | Pictures, shapes, text boxes, groups and their members, charts and SmartArt; OLE objects get theirs written into the kept XML (#386) |
| Charts (`c:chart`), SmartArt (`dgm`) | ✅ | ✅ | Drawn from the chart's cached data and SmartArt's stored drawing (#292), with data labels (`c:showVal`). Charts made in WordCraft (Insert › Chart, #409) are written as a `c:chartSpace` part with their data as literals (`c:strLit`/`c:numLit`, no embedded workbook, so Word shows them and offers to create a workbook on Edit Data) and read back as editable; a chart part holding anything more (any chart from Word, or one re-saved by Word) stays read-only. Saved back as read, with every part they reach (chart, embedded workbook, colours and style; diagram data, layout, quick style, colours and drawing) and their content types; a moved or resized one keeps its new frame, and a pasted copy gets its own parts (#319). SmartArt made in WordCraft (#497) is written from its model: data (`dgm:dataModel` points and connections), our own layout, quick-style and colour definitions under the built-in layout identifiers, and a `dsp:drawing` with every shape placed; it reads back editable only when its data part is exactly what WordCraft writes |
| OLE objects (`w:object`: embedded or linked files, ActiveX) | 🟡 | ✅ | Shown as their picture (VML or DrawingML); saved back whole with the embedding and picture parts, at the size, rotation and flips set in WordCraft (#319, #332). Can't be opened or edited |
| Native Word ink (`w14:contentPart`, InkML) | 🟡 | 🟡 | Drawing-level ink kept opaque with its InkML part, relationship and content type; run-level `mc:AlternateContent` keeps the native branch and VML picture fallback. Shows the preview or a missing-picture box. Repeated saves, copies, resize, rotation and namespace aliases tested with original fixtures. No native stroke rendering, eraser, conversion or replay; direct run-level content parts and ink nested in groups/canvases remain unsupported |
| 3D models | ❌ | ❌ | Dropped on read, not preserved on save |
| Themes, font table, settings, compatibility mode | ✅ | ✅ | Embedded fonts (`w:embedRegular`) not used for rendering, but the font table, its relationships and the embedded font parts are written back unchanged (#770); attached template (`w:attachedTemplate` and its external relationship) and `w:linkStyles` round-trip (#377). The template path comes from the file, so opening never reads it: styles update from it only on an explicit Update Styles |
| Section text direction (`w:textDirection` in `w:sectPr`, §17.6.20) | ✅ | ✅ | `tbRl`, `btLr` (and `tbRlV`/`tbLrV`, read as `tbRl`); `lrTbV` and unknown values read as horizontal (#491) |
| Document paragraph defaults (`w:pPrDefault`) | ✅ | ✅ | Omission and explicit empty defaults remain distinct across repeated saves; nonempty defaults and later default-spacing edits are written |
| Windows (MSI) | `.docx``.docm``.dotx``.dotm``.doc``.dot``.rtf``.odt`; `.md``.txt` under Open With only | Options button opens Settings › Default apps on WordCraft's page | One ProgId per type, `OpenWithProgids`, Capabilities + `RegisteredApplications` (`packaging/windows/wordcraft.wxs`). Not yet tried on a real install |
| Linux, BSD (deb, rpm, Flatpak, AppImage) | Word, ODT, RTF, Markdown, LaTeX, HTML, text (`MimeType=` in the desktop entry, AppStream `mediatype`) | Options button runs `xdg-mime default` for the Word, RTF and ODT types | Not from inside Flatpak (the sandbox can't change host defaults); a bare AppImage needs desktop integration first |
| macOS | `CFBundleDocumentTypes` as Alternate handler (Word, ODT, RTF, Markdown, HTML, text) | Finder › Get Info › Open with › Change All (the Options page says so) | Apple events open the files (#27) |
empty containers and populated defaults across two save/reopen cycles. This preserves
application-defined defaults without assigning inferred Word spacing values to the model.
Observed in Word for Mac 16.113.3 (26092714): three synthetic paragraph-default
controls (omitted, explicitly empty, populated) and two reduced invoice controls retain
identical text, glyph/image geometry, page sizes and embedded font-program hashes through
two WordCraft save/reopen cycles. All fifteen variants open without repair warnings.
Word PDFs and measurements remain local under ignored `plan/word/`; they are not fixtures.
These checks cover preservation on Word reopen, not WordCraft pagination parity.
The [public OOXML reference](https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.wordprocessing.paragraphpropertiesdefault?view=openxml-3.0.1)
describes omission as leaving paragraph defaults application-defined. Real-world corpus
coverage and WordCraft layout matching remain separate gaps.
A reduced original bound-control DOCX loses its backing data, item properties and relationship
on main, both without editing and after unrelated edits. Main's content-control support (#381)
preserves control metadata, including binding attributes, while this custom XML path keeps the
backing store through the bounded opaque part graph: payload bytes, content types and
related-part IDs survive two edited save/reopen cycles.
The public [dataBinding contract](https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.wordprocessing.databinding?view=openxml-3.0.1)
maps a control to a custom XML data part; its [item properties](https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.customxmldataproperties.datastoreitem?view=openxml-3.0.1)
identify the store. Keeping displayed text alone does not preserve that mapping. This change
preserves stores without evaluating XPath or synchronizing control edits into XML.
Native `io::save_path_with` serializes (and, for password-protected DOCX, encrypts) before creating an exclusively owned sibling temporary file. It writes and synchronizes that file, closes it, then replaces the destination. Failed preparation or replacement keeps the original bytes; cleanup removes only the save's temporary file, on a best-effort basis. Existing `<name>.tmp` files, directories and links are untouched. A new document gets the default mode (`0666` less the umask). When replacing an existing regular file, the Unix temporary file starts with mode `0600` and then takes the existing file's basic permissions. Serialization and format support are unchanged.
Synthetic CLI cases and `engine/tests/safe_save.rs` cover occupied names, links, blocked replacement, missing directories, Save As session state, password-protected saves and original-file protection on macOS. Unit tests inject preparation errors and interleave two prepared saves. Independent saves use separate files; the last successful replacement wins. This is not document locking or conflict detection.
Windows/Linux runtime behavior, ACLs and extended metadata, real disk-full conditions, power loss and network filesystems are not verified by these tests. The containing directory is not explicitly synchronized. Cleanup can fail when storage or permissions change, and process termination can leave a temporary file. No Word observation was needed for this filesystem change; it makes no new format-fidelity claim.
2.**Preserve what we can't render**: remaining ink forms and unsupported graphics survive a round trip
(keep the parts and the run). Charts, SmartArt and OLE objects do (#292, #319); drawing-level native ink now keeps its InkML and optional picture fallback.
| 2026-10-12 | minor | RTF reads 8-bit text in the document's or the font's code page (`\ansicpg`, `\fcharset`, `\cpg`) instead of always Windows-1252; a `.doc`/`.docx`/`.rtf` whose content is another of these formats opens by signature. Found on a private corpus of real Russian documents: 38 of 44 `.doc` files were RTF, all now open with their Cyrillic text |
| 2026-10-12 | trivial | `w:sym` and symbol-font runs keep their stored characters on save; TXT export and copy write their Unicode equivalents (#776) |
| 2026-10-12 | trivial | DOCX: a table of contents' entry links (Hyperlink-styled runs in hyperlinks inside a TOC field) import without the Hyperlink style, as Word draws them; measured in Word for Windows |
| 2026-10-12 | trivial | `.doc`: custom tab stops read from styles and paragraphs (`sprmPChgTabsPapx`, `sprmPChgTabs`, with the alignment and leader of each stop; `sprmPChgTabs`' operand size fixed), and a section mark ends its section's last paragraph instead of becoming a page break, so the sections (continuous breaks, footers) are kept. Found by comparing EPA templates with Word for Windows; two of them now paginate like Word |
| 2026-10-12 | trivial | DOCX: a style or paragraph `w:numPr` with a level and no list takes the list of its style chain (Heading 3 based on a numbered Heading 2 numbers 6.4.5, not 6.15), found in NIH's monitoring-plan template against Word for Windows |
| 2026-10-11 | trivial | #534: DOCX indents in characters read and written; `.doc` first-line indents (`sprmPDxaLeft1`, its two-byte operand, and `sprmPDxaLeft1_80`), indents in characters (`sprmPDxc*`) and exact/at-least line spacing (LSPD) read correctly |
| 2026-10-11 | trivial | List and page number formats: all ST_NumberFormat values round-trip; Chinese, Japanese and Korean counting, legal and digit formats, stems/branches, kana, hangul, enclosed and full-width numbers drawn; unknown values are decimal; .doc number format codes mapped (#534) |
| 2026-10-11 | trivial | SmartArt made in WordCraft written as diagram parts (data, layout, quick style, colours, drawing) and read back editable (#497) |
| 2026-10-11 | trivial | Attached template (`w:attachedTemplate`, external relationship of the settings part) and `w:linkStyles` read and written in schema order; opening never reads the template (#377) |
| 2026-10-11 | trivial | A bookmark (or comment range) ending after the document's last table keeps its end, in the table's last cell (#464); a field whose cached result is a picture (`INCLUDEPICTURE`) is kept as a range field around the picture, so the picture survives save; the linked file is never read (#465) |
| 2026-10-11 | trivial | Files with an extension WordCraft doesn't know open by content: text (`.m3u`/`.m3u8` playlists, logs…) through the encoding-detecting text import, misnamed Word/RTF files by signature, binary files refused with an error (#569) |
| 2026-10-11 | trivial | DOCX diagrams (#611): shapes and connectors styled by the theme (`wps:style`) show their outline and fill; preset/system colours; VML lines and rectangles; lines run top-left to bottom-right as in DrawingML |
| 2026-10-11 | trivial | WordArt text effects (`w14:` run properties), text warps (`a:prstTxWarp`) and connectors with glued ends read and written (#416) |
| 2026-10-11 | trivial | Import/export fixes (#433–#440): TXT opens through the encoding-sniffing reader (Windows-1252, unmarked UTF-16) and saves list labels; RTF `\uN` in document info, bookmark names and field instructions; ODT common paragraph styles' text formatting and table-cell background colours; HTML borderless tables export without cell borders and `white-space:pre` keeps edge spaces; LaTeX brace groups scope `\centering`/`\raggedleft`/`\raggedright` |
| 2026-10-11 | minor | Native drawing-level ink and its picture fallback survive DOCX edits and repeated saves; rendering and editing InkML remain missing |
| 2026-10-10 | trivial | OLE objects turned or flipped in WordCraft keep the turn on save (VML `rotation`/`flip`, DrawingML `a:xfrm` with the rotated effect extent); test counts refreshed |
