🌉 Kreuzberg

The fastest document intelligence engine for RAG Developers — Open Source and Cloud

Kreuzberg is a polyglot document intelligence framework built around a high-performance Rust core. It helps developers extract text, structure, metadata, and embeddings from 56+ document formats at native speed, without requiring GPUs.

Kreuzberg is and will remain MIT-licensed and open-source. We're currently building a hosted cloud service around it to make document processing reliable, scalable, and easy to integrate into modern pipelines.

What is Kreuzberg

1. Kreuzberg (Open Source, MIT Licensed)

A high-performance, extensible document intelligence engine.

• Rust core with streaming parsers and full parallelism
• Native bindings for Rust, Python, Ruby, Java, Go, PHP, Elixir, C#, TypeScript(Node/Bun/Wasm/Deno)
• 56+ supported formats including PDF, Office, images, HTML, XML, email, archives, and scientific formats
• OCR with table extraction (Tesseract, EasyOCR, PaddleOCR, extensible via plugins)
• Built-in semantic chunking and optional embeddings for RAG pipelines
• CLI, REST API, Docker images, and MCP server

Read more: https://kreuzberg.dev/

2. Kreuzberg Cloud (Coming Soon)

A fully managed document intelligence API powered by the same engine.

Planned features include:

• Hosted REST API
• Async jobs and webhooks
• Built-in chunking for RAG pipelines
• Premium OCR backends
• Usage dashboards and analytics
• Simple pay-as-you-go pricing

3. html-to-markdown

A high-performance HTML → Markdown converter powered by Rust. Available as a Rust crate, Python package, PHP extension, Ruby gem, Elixir Rustler NIF, Node.js bindings, WebAssembly, and a standalone CLI- with identical rendering behavior across platforms.

Why Choose Kreuzberg

• Truly polyglot: same engine across languages
• High throughput: optimized for batch workloads and multi-GB documents
• Memory efficient: streaming architecture keeps memory usage predictable
• Flexible deployment: use via CLI, REST API, MCP server and more
• MIT licensed: safe for enterprise, commercial, and closed-source use
• Built for RAG: native chunking, embeddings, and customization

Community

Join our dev community to ask questions, share feedback, and show what you’re building.

Discord: https://discord.gg/xzx4KkAPED
Subreddit: https://www.reddit.com/r/kreuzberg_dev/
LinkedIn: https://www.linkedin.com/company/kreuzberg-dev/
X/Twitter: https://x.com/kreuzberg_dev

Contributing

Contributions are welcome.

1. Open an issue to propose a change
2. Submit a pull request
3. Maintainers review and merge

See CONTRIBUTING.md in the relevant repository for details.
Kreuzberg repository: https://github.com/kreuzberg-dev/kreuzberg

License

All open-source code is MIT licensed. It’s permissive, enterprise-safe, and commercial-friendly. That means you can use Kreuzberg freely in both commercial and closed-source products with no obligations, no viral effects, and no licensing restrictions.

Maintainers

Built with love in Kreuzberg, Berlin.