Rust-native OOXML engines with collaboration and agent editing at the core.
WebAssembly for browsers. Headless APIs for servers. Native Rust where you need it.

Packages

Documents — .docx

package	registry	what it does
betteroffice-docx	crates.io	typed Rust API for opening, editing, laying out, and saving DOCX documents
@betteroffice/docx	npm	framework-free .docx editor core — parsing, CRDT editing, and page layout in Rust through WebAssembly
@betteroffice/docx-react	npm	drop-in React .docx editor
betteroffice-docx	PyPI	Python API for reading, editing, laying out, and rasterizing DOCX documents

Spreadsheets — .xlsx

package	registry	what it does
betteroffice-xlsx	crates.io	typed Rust API for opening, editing, calculating, rendering, and saving XLSX workbooks
@betteroffice/xlsx	npm	framework-free spreadsheet core powered by the Rust engine through WebAssembly
@betteroffice/xlsx-react	npm	drop-in React spreadsheet editor
betteroffice-xlsx	PyPI	Python API for opening, recalculating, styling, rendering, and saving XLSX workbooks

Presentations — .pptx

package	registry	what it does
betteroffice-pptx	crates.io	typed Rust API for opening, editing, rendering, and saving PPTX presentations
@betteroffice/pptx	npm	framework-free .pptx editor core — slide model, masters, and rendering in Rust through WebAssembly
@betteroffice/pptx-react	npm	drop-in React .pptx editor
betteroffice-pptx	PyPI	Python API for reading, editing, saving, and laying out PPTX presentations

What to install for which language, with a first example each: npm, crates.io, PyPI.

Structure

• crates/ — the Rust engines
• packages/ — the TypeScript editor packages
• bindings/ — the Python bindings
• apps/web — betteroffice.dev (Next.js on Cloudflare Workers)
• apps/docs — documentation

Development

bun install
bun run build:xlsx-wasm # compile the ignored spreadsheet wasm asset
bun run build:docx-wasm # compile the ignored document wasm assets
bun run dev          # web app
bun run rust:check   # fmt + clippy + tests for the engines

Use the Office visual quality harness to export Word, PowerPoint, and Excel references, compare local renders, or refresh the fidelity scores with the manual action.

Visual fidelity

Generated by the Visual fidelity action.

Format	Latest published version	SSIM	Latest commit	SSIM	Samples (published / commit)
DOCX	0.1.0	0.9288	3d518130	0.9291	49 / 49
PPTX	0.0.4	0.9326	3d518130	0.9322	1 / 1
XLSX	0.1.0	0.7052	3d518130	0.9292	1 / 1

SSIM is the mean page-penalized grayscale score at 150 DPI, without resampling or alignment correction. DOCX uses recorded page bounds with at most a one-pixel edge adjustment. Missing or extra pages are penalized. All formats use pinned CDN fonts. XLSX uses recorded print ranges and scale; its score measures range rendering, not automatic print pagination. Scores cover the selected corpus samples.

Contributing

Contributions are welcome. We ask for a one-time signature of the Contributor License Agreement on your first pull request (corporate version).

License

Apache-2.0 — third-party attribution in THIRD-PARTY-NOTICES.md.