Open source. Open possibilities.

Zettlr is a privacy-first, open-source publication workbench designed for academic and professional writing, featuring Zettelkasten support and deep integration with reference managers.

An MIT-licensed family of independent TypeScript packages that convert losslessly between OOXML, OpenDocument, Markdown, EPUB, PDF, RTF and legacy formats through one shared Zod schema, with a CLI, MCP server and web UI built on top.

PDFMathTranslate is an open-source tool for translating scientific PDF documents while preserving their original layout, including formulas, charts, tables of contents, and annotations. It supports multiple translation services and offers CLI, GUI, Docker, and Zotero integration.

Papermark is an open-source DocSend alternative for secure document sharing and data rooms, with built-in analytics, custom domains and branding. It is self-hostable and built with Next.js, TypeScript, Prisma and PostgreSQL.

BentoPDF is a privacy-focused, client-side PDF toolkit that allows users to manipulate, edit, and convert PDF files directly in the browser without server-side processing.

Paperless-ngx is a document management system that transforms physical documents into a searchable online archive to reduce paper usage.

Free index of Chinese programming books covering operating systems, AI, Web, algorithms, and various programming languages, with community contributions.

Converts docs, GitHub repos, PDFs, videos into AI skills for Claude, Gemini, OpenAI with conflict detection and 22 export targets.

MinerU is an open-source document parsing engine that converts PDF, images, DOCX, PPTX, and XLSX into structured Markdown/JSON for LLM, RAG, and agent workflows. It supports VLM+OCR dual engines, 109-language OCR, and private/offline deployment.

Docling parses diverse document formats including PDF, DOCX, PPTX, XLSX, HTML, EPUB, images, audio, and more, with advanced PDF understanding, export to Markdown/JSON, OCR, VLM support, and integrations with LangChain, LlamaIndex, and other AI frameworks for RAG and agentic workflows.

VectorMojo is a client-side design-file to SVG converter that runs in the browser. It reads PSD/PSB, PDF, modern Illustrator AI, EPS, SVG, PNG and JPEG, then exports SVG, PNG, PDF or copied SVG markup, keeping parsing, tracing and rendering in the tab.

A tool for writing and generating interactive gamebooks from Markdown and YAML, with builds for HTML, PDF, EPUB, and optional MOBI.

Stirling PDF is an open-source PDF platform for editing, signing, converting, and automating PDFs locally or on your own servers—no external services required.

ByteDance's open-source document image parsing model (ACL 2025) that turns PDFs and photographed pages into structured Markdown/JSON, covering layout, reading order, text, tables, formulas, and code.

Sioyek is a PDF viewer optimized for textbooks and research papers, offering features like smart jumps, portals, highlights, and customizable keybindings. It supports Windows, macOS, and Linux with official and third-party packages.

MarkItDown is a lightweight Python utility designed to convert various file formats and office documents into Markdown, specifically optimized for use with LLMs and text analysis pipelines.

Documenso is an open-source digital document signing platform designed as an alternative to DocuSign, emphasizing trust through self-hosting capabilities.

AksharaMD is a local, parser-agnostic tool that grades how well a chosen document parser converted a source file into AI-friendly Markdown, returning a per-document readiness score, block-level provenance tags, named warnings, and an optional source-grounded ACCEPT/REJECT verdict.

KOReader is a versatile document viewer for e-ink readers, supporting PDF, EPUB, and many formats across devices like Kindle, Kobo, and Android, with extensive customization and plugins.

Bundle is a privacy-first web toolkit providing PDF, image, developer, and text tools that run entirely in the browser without server uploads.