Home / ArtCraft Office
Our reading: they open real Office files, but keep your originals. All 9 files made in Microsoft Office that we tried opened in the 0.7.0 browser builds, and each app's command-line tool saved them back as .docx, .xlsx or .pptx with the text, tables, formulas and speaker notes we checked still in place. One picture stored as a PDF inside a slide was dropped, and all three apps describe themselves as alpha.
This page is only about Office files. WordCraft, GridCraft and DeckCraft each have their own page for the rest of the app. Rows marked README are from the README we read on Oct 17, 2026. Everything else is our test of version 0.7.0 that day.
All three are free, open source, and need no account. Each README badge says MIT OR Apache-2.0.
| App | Office app it follows | Stage, in the README's words | Guide |
|---|---|---|---|
| WordCraft | Microsoft Word. README: a clean-room reimplementation of Microsoft Word. | README: in alpha; 88% of Word's ribbon features with commands; about 60% of the way to replacing all of Word for real work. | WordCraft |
| GridCraft | Microsoft Excel. README: a clean-room reimplementation of Microsoft Excel. | README: in alpha; 89% of the Excel ribbon commands in its catalog; 513 of Excel's 523 worksheet functions; about 50% ready for real work. | GridCraft |
| DeckCraft | Microsoft PowerPoint. README: a clean-room reimplementation of Microsoft PowerPoint. | README: badge says early development; text says in alpha, heading for beta, and that it can open and save PowerPoint .pptx. | DeckCraft |
The nine files are public test files from the open-source Apache POI project, saved by Microsoft Office. None of the nine is in the WordCraft, GridCraft or DeckCraft repositories at 0.7.0.
Two checks, both on 0.7.0, Oct 17, 2026. The command-line check used each app's convert command and saved the file back in the same format. The browser check opened the published web build in an automated headless Chromium and passed each file through the app's own Ctrl+O. The pictures are that browser build.
| File | In the file | Saved by | On screen in the browser build |
|---|---|---|---|
| form_ | 215 paragraphs, 6 tables, 1 picture | Microsoft Office Word 12.0000 | The blank form, its tables, and header text |
| VariousPictures.docx | 7 paragraphs, 5 pictures (jpeg, png, wmf, emf, pict) | Microsoft Office Word 12.0000 | The title and all 5 pictures |
| heading123.docx | 6 paragraphs | Microsoft Macintosh Word 12.0000 | First, Second and Third paragraph. The styles gallery shows Heading 1, Heading 2 and Heading 3 |
| WithThreeCharts.xlsx | 3 sheets, numbers, 3 chart parts in the file | Microsoft Excel 12.0000 | Sheet1, Sheet2, Sheet3 and the numbers. No chart drawn |
| 55406_ | 2 conditional-format rules, formula ISEVEN(ROW()), sheet name Summary, no stored cell values | Microsoft Macintosh Excel 14.0300 | The Summary tab. No cell values, and no fill we could see |
| 50867_ | Table Tabella1, range A1:C3, strings a, b, c, 3 sheets | Microsoft Excel 12.0000 | Sheets Foglio1, Foglio2 and Foglio3, headers a b c, and the numbers |
| 2411-Performance_ | 48 slides, speaker notes, and media including one PDF picture | Microsoft PowerPoint 12.0001 | Slide 1 of 48, the title, and notes starting "Hello crowd, welcome." A notice says Arial, Courier, Courier New and 2 more aren't installed, and text that uses them is shown in a similar font |
| SampleShow.pptx | 2 slides, an italic green line, and notes | Microsoft Office PowerPoint 16.0000 | Slide 1 of 2, the italic green line, and the first note |
| backgrounds.pptx | 4 slides, 5 pictures, fill labels | Microsoft Office PowerPoint 14.0000 | Slide 1 of 4, "Solid Fill" and "Tan, darker 10%" |
A few files were rewritten inside. A shared formula, for example, was expanded to one formula per cell. We checked those inside the files: the expanded formulas are equivalent, and the words and styles are unchanged. The only loss we count is one picture.
| App | Still there after the save | Changed, lost, or not confirmed |
|---|---|---|
| WordCraft | form_footnotes stayed at 215 paragraphs and 6 tables. VariousPictures stayed at 5 pictures. heading123 stayed at 6 paragraphs, with Heading 1, Heading 2 and Heading 3, and the same words, including FffLorem, which the original already wrote that way. | Nothing in these three files counts as lost. The save joined text runs that spelling marks had split. A browser save back to .docx is not confirmed: our automated browser produced no download, so this does not show that WordCraft cannot save. |
| GridCraft | WithThreeCharts kept 3 sheets, the numbers we checked (A1=1, B1=10, D1=5), and 3 chart parts in the file. 50867 kept table Tabella1 at A1:C3. 55406 kept both conditional-format rules. | The shared formula was written out per cell. The results match, so that is not a loss. Not confirmed: the browser build did not draw the charts, the conditional-format fill was not visible, and a browser save back to .xlsx did not finish because the automated browser cancelled the save dialog. That cancellation does not show that GridCraft cannot save. |
| DeckCraft | 2411 kept 48 slides and the 8 speaker notes that had text. SampleShow stayed at 2 slides and 2 notes. backgrounds stayed at 4 slides and 5 pictures. The sentences we checked were still there. | Lost: one picture on slide 5 of 2411, stored as a PDF (ppt/media/image3.pdf). Empty note slides were dropped; the 8 notes with text were not. Not confirmed: Ctrl+S in the browser build saved a .deckcraft file, not a pptx. |
The stage column above is each README's own estimate, not ours. WordCraft's README adds that beta needs testing against real-world .docx files, including charts and SmartArt through a round trip. GridCraft's README says next up is XLSX fidelity on real-world files. DeckCraft's README says it can open and save PowerPoint .pptx.
Our take: on opening, reading and editing, these 9 files did well. For a file you care about, keep the original, and open the saved copy in Microsoft Office yourself. We have not opened any saved copy in Office.
WordCraft, GridCraft and DeckCraft 0.7.0 were published on Oct 14, 2026. Each one is free and needs no account. The Mac, Windows, Linux and browser files are on each app's GitHub releases. Our download guide shows how to check the SHA-256. Start from the WordCraft, GridCraft or DeckCraft page.
The word processor, including the 0.6.1 test.
Read guide →The spreadsheet, including the 0.6.1 test.
Read guide →The slide app, including the 0.6.1 test.
Read guide →Which Craft app stands in for which Adobe app.
Read guide →The studio, the 13 Craft apps, and the price.
Read guide →
