GenOffice

The world's first full-featured open-source AI Office suite.
Word, Excel, PowerPoint and PDF files, edited by you and your AI, saved back in the real formats.

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GenOffice is a free, open-source alternative to Microsoft Office for macOS, Windows and Linux. It opens and saves native .docx, .xlsx and .pptx files, edits PDF, Markdown and HTML, and puts an AI agent next to every document — not a chat box bolted on the side, but an editor that reads the file, makes the change, and shows you exactly what it touched.

• Real formats, byte-preserving. Only what you edit is rewritten. Everything else in the file survives byte-for-byte, so documents keep working in Word, Excel and PowerPoint.
• AI you can review. Edits land as tracked changes and diffs with one-click rollback. Spreadsheets get live formulas, not pasted numbers. Decks and pages are generated onto the canvas and stay fully editable.
• Local by design. Files open, edit, save and convert on your machine. PDF → Word / Excel / PowerPoint, Markdown → Word and HTML → Word all run on-device. Only the AI calls leave the machine, to the provider you choose.
• Your keys or none. Sign in with Genspark and skip keys, or bring your own key for Claude, OpenAI, Gemini, DeepSeek, Kimi, GLM, Qwen, Doubao, MiniMax, Grok, Mistral, OpenRouter, Requesty, Opper, or any OpenAI-compatible endpoint, local servers included.
• Scriptable and agent-ready. The app ships a genoffice command line and a skill for Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf, so a coding agent can create, convert, read and edit real Office files on your machine without opening a window.

Get it: macOS (Apple Silicon and Intel) · Windows (x64 and Arm) · Linux (deb, rpm, AppImage) — details and requirements in Download.

Demo

Six apps, one AI panel, and a command line for your coding agent. Every screenshot is the real app on macOS, with the AI driven from the prompt you can read in the panel.

1 · Docs — open and edit .docx with an AI you can review

Opens the file as Word lays it out — two-column sections, full-bleed images, shaded tables, headers and footers, pagination on Word's line metrics. Styles, comments, tracked changes, equations and ink round-trip untouched.	Ask for the edit — the AI reads the blocks it needs, rewrites the Overview and inserts a new bulleted section. Every AI turn is a snapshot you can roll back; with Track changes on, edits arrive as Word-style revisions.

2 · Sheets — .xlsx with live formulas and charts, not pasted numbers

Build it — from one sentence the agent adds a Summary sheet with real SUMIFs by region and category, inserts a column chart, and applies the 43 changes as a single undoable batch.	Ask it — questions about the workbook come back with the reasoning and the exact cells used as clickable citations. Under the hood: an in-house Rust .xlsx engine, pivot tables, slicers, conditional formatting and formula tracing.

3 · Slides — from a prompt to a .pptx deck

One line in — "Create a 10-slide investor pitch deck for Aurora Home…". GenOffice plans the storyline, researches the numbers, and drafts every slide onto the canvas as a real .pptx.	A finished deck out — eleven designed slides with consistent typography, imagery and a closing call to action; keep editing with masters, layouts, smart guides and non-destructive cropping, or ask the panel to restyle, rewrite and reorder.

4 · PDF — edit PDF text in place, convert PDF to Word on-device

Edit inside the page — Edit text mode outlines every text block for in-place retyping; the content stream is rewritten through PDFium with the original fonts, not a cover-up annotation. Ask the AI about a long report and get answers with page citations.	Convert on-device — PDF Converter → PDF to Word produces an editable .docx that opens in Docs next to the source, headings, stat rows and paragraphs intact. Excel and PowerPoint targets work the same way; scanned pages go through the system OCR.

5 · HTML — an AI page and UI builder, design brief first

Say what the page is for and who it is for. The AI proposes a design brief first — hook, palette, typography and style directions — then builds a single self-contained .html file against those tokens.

Generated from one prompt — a bold hero, feature cards, pricing and a waitlist form for Lumen, built in the Midnight Studio direction. Click any element to restyle it, double-click to edit text, or switch to the CodeMirror source view.	Same design, new direction — one Restyle request swaps the brief's tokens and the page follows: warm paper, editorial serif, sun-orange accent, nothing rewritten. Present fullscreen, or export as PDF or a native editable Word document.

UI mockups — the "personal dashboard" starter turns a persona into a working layout: left rail, greeting, billable-hours sparkline, invoice and utilization cards, all real HTML you can hand to a developer.	Data stories — the "data report" starter builds an editorial broadsheet: serif masthead, one headline number, a rule-separated stat row, inline SVG charts and a methodology note.

6 · Markdown — a block editor over plain .md, with Ask AI

Ask AI about a selection — select any passage and an Ask AI chip appears: type an instruction or pick a suggestion, send it now, or queue several anchored edits and run them in one pass. The same entry exists in every app.	Rendered, saved as plain Markdown — headings, lists, tables, images, code blocks and Mermaid diagrams in a Tiptap block editor, written back as plain .md, with a fully local Markdown → Word export.

7 · CLI — your coding agent drives GenOffice, on your machine

GenOffice ships a genoffice command line and an agent skill. Install the skill and Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode or Windsurf can create, convert, read and edit real Office files through the same engines as the apps, without opening a window.

One prompt to your agent — "Build an eight-slide deck about the Solar System." The agent reads the skill, writes a style sheet, an outline and one page spec per slide, generates the two photos with genoffice image, and lets genoffice slides check reject anything that overflows or overlaps before genoffice create assembles the .pptx and slides render hands back a PNG per slide to look at.	Install once, from Settings → Integrations — GenOffice lists the coding agents it finds on this computer and writes the skill into each one you pick. Or download the skill as a zip, or run npx skills add genspark-ai/genoffice. Commands and the full workflow are in Command line and agent skill.

8 · MCP — the same tools over the Model Context Protocol

Every genoffice command is also an MCP tool. Claude Code, Claude Desktop, Cursor and any other MCP client can start genoffice mcp themselves, with no skill to install and no window open, and get 29 tools plus the op references as resources. A second, HTTP server inside the app lets an agent build a Word document in a visible editor tab while you watch.

One prompt, 38 tool calls, no shell — "Build an eight-slide investor briefing about renewable energy in 2026, with a real photo on the cover and wherever a photo helps." The agent pulls the figures and the photos with search, asks media whether each candidate picture is a real photograph, calls deck_start with a style sheet and an outline, then deck_page once per slide; every page is checked against the outline and the palette before it is kept, deck_build assembles the .pptx, slides_audit looks for overflow, slides_render hands back a PNG per slide as image content the model can look at, and deck_replace fixes the three pages it did not like.

Connect once, from Settings → Integrations — copy the claude mcp add line for Claude Code, or the JSON block into Cursor, Claude Desktop or any other MCP client. Option B switches on the local HTTP server for the visible Word editor. Both are described in MCP server.

Why GenOffice

• Open source, Apache-2.0, built in the open on GitHub.
• Yours to run. Native apps for macOS, Windows and Linux; files stay on your disk and every edit, save and conversion happens on your machine.
• Real Office files. Native .docx, .xlsx and .pptx, byte-preserving: the parts of a file you did not touch are copied exactly as they were.
• An AI that edits the document itself. Tracked changes in Docs, live formulas and charts in Sheets, slides drawn onto the canvas, every AI turn a snapshot you can roll back.
• Your model, your key. Sign in with Genspark, or bring a key for Claude, OpenAI, Gemini, DeepSeek and more, local servers and any OpenAI-compatible endpoint included.
• PDF done properly. Edit text inside the page, and convert PDF to Word, Excel or PowerPoint on-device, with system OCR for scans.
• Markdown and HTML too, with the same AI panel and local export to Word.
• Scriptable. A genoffice command line, an agent skill and an MCP server put every engine at the service of Claude Code, Claude Desktop, Codex, Cursor and other agents, still on-device.
• Free, for individuals and teams alike.

AI backends

Sign in with Genspark and there is nothing to configure: model calls route through the Genspark proxy (Claude, GPT and Gemini families) and the agents get web and image search, image generation, and image/audio/video analysis.

Or bring your own key. Settings → AI lists Claude, OpenAI, Gemini, DeepSeek, Kimi, GLM, Qwen, Doubao, MiniMax, Grok, Mistral, OpenRouter, Requesty, Opper and OpenCode Zen/Go, plus a custom slot for any OpenAI-compatible endpoint (base URL + key), including local model servers. Search and media have their own per-capability providers under AI Media & Search: Serper or Tavily for web search, and OpenAI, Gemini, Doubao/Seedream, GLM, Grok, Qwen, MiniMax or any OpenAI-compatible images endpoint for image generation and image/video analysis.

The whole suite ships light, dark and system themes. Themes only change what is on screen: exports, prints and saved files always keep the document's own colors.

Command line and agent skill

Everything the apps can do to a file, the genoffice command line can do from a terminal: inspect, convert, create, read and edit Word, Excel, PowerPoint, PDF, Markdown and HTML on the same engines, headless. It installs with GenOffice, needs no runtime of its own, and never sends a document anywhere. Paired with the bundled agent skill, it turns a coding agent into a document worker that produces real Office files instead of Markdown approximations.

Works with: Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf out of the box, any other agent that reads skills, and, through the MCP server, Claude Desktop and every MCP client.

Install the skill

Then start a new chat and ask for a document. The skill teaches the agent when to reach for genoffice, how to read a file before editing it, and how to check its own work.

Quickstart from the terminal

genoffice --version
genoffice info report.docx --json                  # headings and blocks; or sheets, slides, pages
genoffice convert report.md --to pdf               # md/html/docx/xlsx/pptx → pdf, pdf → docx/xlsx/pptx, …
genoffice create --type docx --from notes.md --out notes.docx
genoffice create --type xlsx --from table.json --out sales.xlsx   # "=SUM(B2:B9)" cells stay live formulas
genoffice docs read report.docx --range 0-9 --json # then `docs apply --ops edits.json` edits in place
genoffice render report.docx --out shots/          # one PNG per page, to look at what you made
genoffice open sales.xlsx                          # hand the result to the editor

Every command prints a one-line summary, or a single JSON object with --json. Edits are atomic: a rejected op leaves the file untouched and comes back with a guided error. genoffice help lists the current command surface; the full reference is packages/cli/README.md.

What the agent actually runs

The Solar System deck in the demo took one prompt in Claude Code. Behind it, the agent followed the skill's staged workflow and the CLI checked every stage before the next one started:

genoffice capabilities --json                        # which cloud tools GenOffice has configured
genoffice guide slides design                        # the deck workflow and layout library
genoffice image "the eight planets in a row …" --aspect 16:9 --out deck/assets/cover.jpg
genoffice slides check deck/outline.json --json      # 8 pages, no findings
genoffice slides check deck/pages/01.json --json     # builds one slide, audits overflow and overlap
…                                                    # one page file per slide, fixed until each check is clean
genoffice create --type pptx --spec deck/pages --outline deck/outline.json --out deck/solar-system.pptx --json
genoffice slides render deck/solar-system.pptx --out deck/shots --json
genoffice slides audit deck/solar-system.pptx --json    # 8 slides, no layout issues
genoffice slides replace deck/solar-system.pptx --slide 4 --spec deck/pages/05.json --json
genoffice open deck/solar-system.pptx

No model call happens inside genoffice: the agent does the thinking, the CLI does the building and the checking, and the result opens in GenOffice or PowerPoint as an ordinary .pptx.

MCP server

The same commands are available as Model Context Protocol tools, for assistants that cannot run a terminal or that you would rather not give one. There are two ways in, both shown with copy-ready snippets in Settings → Integrations → MCP:

# Claude Code
claude mcp add --transport stdio genoffice -- genoffice mcp

// Cursor, Claude Desktop or any other MCP client
{ "mcpServers": { "genoffice": { "command": "genoffice", "args": ["mcp"] } } }

# On the machine that has GenOffice (private network; add --token for a shared box)
genoffice mcp --http 3093 --host 0.0.0.0 --token "$GENOFFICE_MCP_TOKEN"

# From the client: upload, then use the URL wherever a tool takes a file
curl -T report.docx -H "Authorization: Bearer $GENOFFICE_MCP_TOKEN" http://server:3093/files/
#   → { "url": "http://server:3093/files/<id>/report.docx", ... }
#   docs_read({ "file": "http://server:3093/files/<id>/report.docx" })
#   docs_apply(...) → output_url, downloadable with curl -o

Over HTTP every session gets a private scratch folder, relative paths and deck folders resolve inside it, open is not offered, and with GENOFFICE_ALLOWED_ROOTS unset the tools cannot leave the server's own file store. render, convert to PDF and create_pdf still start a hidden GenOffice process, so a headless host needs the app installed and a virtual display (xvfb-run).

genoffice here is the CLI shipped inside the app (on macOS /Applications/GenOffice.app/Contents/Resources/cli/genoffice; the settings pane prints the exact path for your install). The server carries its own workflow instructions and exposes the op references as genoffice://guide/* resources, so no skill is needed; the skill and the MCP server can coexist and the assistant picks one. Cloud features (search, image, media) still go through the provider configured in GenOffice; everything else runs locally, and GENOFFICE_ALLOWED_ROOTS confines every tool to the folders you list.

The renewable-energy deck in the demo is what one prompt in Claude Code with only the genoffice MCP server attached looks like from the protocol side:

capabilities · guide(slides, spec) · guide(slides, design)
search(query) ×4                         → IEA, BNEF and IRENA figures for the slides
search(query, images) ×7 · media(url, ask) ×7
                                         → candidate photos, each one checked to be a real photograph
deck_start(dir, style, outline)          → outline checked: 8 pages to write
deck_page(dir, 0, page) … deck_page(dir, 7, page)
                                         → each page checked against the outline and the palette; one page sent again
deck_build(dir, out)                     → renewables-2026.pptx, no image failures
slides_audit(file) · slides_render(file, out)
                                         → no layout findings; 8 PNGs come back as image content
deck_replace(dir, n, page) ×3 · slides_render(file, out)
                                         → three pages fixed after looking at the renders

Thirty-eight calls, about thirteen minutes, and the assistant never touched a shell: the figures, the photos, the guides, the checks and the renders all travelled as MCP tool results. Only search and media left the machine, to the provider configured in GenOffice.

Download

All builds come from main; the macOS and Windows installers are signed. Older versions are on the Releases page.

sudo apt install ./genoffice_<version>_amd64.deb

sudo dnf install ./genoffice-<version>.x86_64.rpm     # Fedora / RHEL family
sudo zypper install ./genoffice-<version>.x86_64.rpm  # openSUSE

chmod +x GenOffice-<version>.AppImage
./GenOffice-<version>.AppImage

How it works

Seven Electron apps — Docs, Sheets, Slides, PDF, Markdown, HTML and the tabbed shell — share one engine layer of pure TypeScript packages plus a Rust sidecar for .xlsx. The original file is always the source of truth: edits are applied as narrow patches, and everything the editor did not touch survives the round trip untouched.

open docx ─► archive original by hash (never touched)
          ─► parse word/document.xml into a block tree, each block anchored to its original XML
          ─► Tiptap editor (manual + AI editing, dirty tracking)
save      ─► dirty blocks → OOXML fragments (referencing existing styles only)
          ─► splice into the original document.xml; untouched blocks keep their bytes
          ─► repack the zip; every other entry is copied byte-for-byte

The package-by-package tour (docx/pptx engines, pdf2docx, html2docx, the agent core and providers) lives in CONTRIBUTING.md.

Development

npm install
npm run fixtures     # generate test .docx fixtures
npm test             # engine + app unit tests (docs/sheets/slides need no display)
npm run typecheck    # tsc --noEmit across every workspace
npm run dev          # all six editors + shell against Vite dev servers
npm run dev:docs     # a single app (same pattern works per workspace)
npm run dist:mac     # package macOS dmg (regenerates third-party notices)
npm run dist:win     # package Windows nsis installer
npm run dist:linux   # package Linux AppImage + deb + rpm

The sheets app additionally needs a Rust toolchain for its xlsx sidecar (cargo on PATH); npm run build -w @genoffice/sheets compiles it automatically. See CONTRIBUTING.md for the checks every change must pass and how pull requests land.

Community

GenOffice is in active development and your feedback shapes it.

• Report a bug or request a feature in GitHub Issues.
• Join the GenOffice group chat on GenTeam to talk to the team and other users.
• Star the repo if GenOffice is useful to you — it is the best way to support the project.

FAQ

Security

See SECURITY.md for the process security posture (renderer sandboxing, IPC validation, external-link gating) and the threat models for AI-generated content.

Acknowledgements

GenOffice would not be possible without these open-source projects:

• Electron — the desktop runtime for every app.
• Univer (Apache-2.0) — the spreadsheet UI core that Sheets extends.
• PDFium (BSD-3-Clause, bundled via @embedpdf/pdfium) — the content-stream engine behind true PDF text and image editing.
• pdf.js (Apache-2.0) and pdf-lib (MIT) — PDF rendering and document assembly.
• Tiptap / ProseMirror — the block editors in Docs and Markdown.
• CodeMirror (MIT) — the source editor in HTML.
• Konva — canvas rendering for Slides and Sheets charts.
• HarfBuzz (wasm) — text-shaping metrics for complex scripts.
• calamine and IronCalc — the read and calc layers of the Rust xlsx sidecar.
• libeot (MPL-2.0) — the MicroType Express decoder for embedded PowerPoint fonts, ported to TypeScript.
• React (MIT) — the UI layer of every app.
• Mermaid (MIT) and KaTeX (MIT) — diagrams and math in Markdown and Docs.
• opentype.js (MIT) — font parsing for metrics and glyph lookup.
• JSZip (MIT) and fast-xml-parser (MIT) — the OOXML container and XML layers.
• Fluent UI System Icons (MIT) — the icon set across the ribbons.
• electron-updater (MIT) — in-app updates.
• Liberation, Carlito, Caladea, and Noto CJK fonts (OFL/Apache-2.0) — bundled document fonts.

npm run notices regenerates the bundled third-party license summary (tools/gen-third-party-notices.mjs); all runtime dependencies are MIT/Apache-2.0/BSD-3-Clause/OFL.

License

GenOffice is licensed under the Apache License 2.0, with one exception: the ee/ directory is reserved for future enterprise modules and is covered by the GenOffice Enterprise License.

The GenOffice and Genspark names and logos are trademarks of Mainfunc, Inc. The Apache-2.0 license does not grant permission to use them (see section 6); forks should use their own branding.