yukiyokotani / office-open-xml-viewer

A browser-based viewer for Office Open XML documents that renders to an HTML Canvas element.

qax-os / excelize

Go language library for reading and writing Microsoft Excel™ (XLAM / XLSM / XLSX / XLTM / XLTX) spreadsheets

unidoc / unioffice

Pure go library for creating and processing Office Word (.docx), Excel (.xlsx) and Powerpoint (.pptx) documents

apache / poi

Mirror of Apache POI gitbox. The Java API for Microsoft Documents.

EPPlusSoftware / EPPlus

EPPlus-Excel spreadsheets for .NET

nolze / msoffcrypto-tool

Python tool and library for decrypting and encrypting MS Office files using passwords or other keys

stffnb / edentext

Powerful web-based Word Processor for docx and odt. Free, Open Source, Private by Design

deckflow / deckprobe

ffprobe for documents — probe PDF, Microsoft Office, and Apple iWork files without opening them. Rust CLI + browser WASM SDK returning structured JSON with confidence, evidence, and measured I/O cost.

xmutfyh / dsh-plugin-writing-guard

Scientific writing & document integrity guard for AI-assisted research — argument economy, deterministic integrity, safe Word editing. Local · Deterministic · Zero LLM.

Prism-Studio-dev / Prism.DOCX

A desktop editor for Microsoft Word (.docx) document metadata.

HututuWorks / sci-diagram-pptx

Reconstruct scientific frameworks, mechanisms, and flow diagrams as native editable PowerPoint—with provenance-bound, fail-closed QA for Codex.

CasualOffice / opendoc

Apache-2.0, embeddable, local-first editor for Word documents, and the deterministic Rust engine underneath. Reads and writes DOCX and ODT, exports PDF, HTML and Markdown, and runs natively, headless, or in the browser as WebAssembly. An open alternative to ONLYOFFICE Docs.