#openxml

Open XML SDK by Microsoft

Lightweight, fast and simple cross-platform processing tool for importing and exporting spreadsheet documents.

Swiss-army toolkit for .docx — faithful DOCX→HTML rendering, an in-browser block editor, Word-grade redlines with native tracked changes, and anchor-addressed markdown for LLM agents. .NET, WASM/TypeScript, Python, CLI.

MIT-licensed, COM-free .NET libraries for creating, reading, editing, converting, rendering, and extracting Office, PDF, email, OneNote, and text formats.

PowerPoint .NET library for reading, modifying, and generating PPTX presentations without Microsoft Office

A pure PHP library for reading and writing word processing documents

Fresh PowerTools for OpenXml

Create and edit Microsoft Word (.docx) documents in pure Go — fluent builder, templates & mail merge, themes, tables, and images.

Html2OpenXml is a small .Net library that convert simple or advanced HTML to plain OpenXml components. This program has started in 2009, initially to convert user's comments into templated Word.

DocxTemplater: C# library for generating DOCX documents with templates, supporting placeholders, loops, tables, charts, Markdown/HTML, and image embedding. Ideal for document automation.