The fastest Office document library for Python, Rust, Go, JS/TS, C# and WASM. DOCX, XLSX, PPTX, DOC, XLS, PPT. Up to 100× faster than python-docx/openpyxl/python-pptx. 100% pass rate on valid Office files. MIT/Apache-2.0.
Browser-native Office / PDF / CAD / archive viewer for internal web apps, with Vue, React, Svelte, jQuery, Web Components, and no server-side conversion.
Generate, fill, and read OpenDocument Format (.odt) files in JavaScript and TypeScript. Works in Node.js and browsers. Build documents from scratch, fill existing templates with data, or convert .odt files to HTML. Create reports, invoices, contracts, and letters. The modern simple-odf alternative. No dependencies. Apache 2.0 open source