I build software for automated, high-quality typesetting — turning structured data (XML, JSON, databases) into beautifully laid out PDFs. Catalogs, data sheets, price lists, reports, invoices: anything where layout matters and the content keeps changing.

Most of what you'll find on this page exists because I needed it myself while building my main product, the speedata Publisher. I open-sourced the pieces that I thought others might find useful too.

Looking for the big picture? constellation.speedata.de is an interactive map of all my open source projects around PDF, typesetting and publishing — showing how the pieces below fit together.

A professional database publishing system. You give it your data and a layout description, it gives you a print-ready PDF — fully scriptable, reproducible, and suitable for very long and very demanding documents.

• Repository: publisher
• Examples: examples
• Documentation & downloads: https://www.speedata.de

The Publisher is free and open source (AGPLv3). I also offer commercial licenses, training and support contracts for teams that need guarantees, priority fixes or help getting their first project into production — that is how I fund the work you see here. If that sounds relevant, get in touch.

xts is my experimental successor: a smaller, more modern XML typesetting engine that incorporates everything I have learned from years of running the Publisher in production. Still evolving, but already usable — see xts-examples for what it can do today.

Working with XML in Go is famously thin on the ground. While building the Publisher I ended up writing a small ecosystem of XML tools that I now use everywhere — and that you can use independently in your own projects:

• goxml — a struct-based XML representation for Go that preserves enough of the original document to round-trip cleanly.
• goxpath — a full XPath 3.1 interpreter for Go. As far as I know, the most complete one in the ecosystem.
• goxslt — an XSLT processor written in pure Go, no libxslt required.

If you arrived here from one of these libraries: hi! They are battle-tested because I use them myself, every day, inside the Publisher.

• imageshaper — generates outline paths for images, used for text-around-image effects.
• vscode-speedata — a VS Code extension for editing RelaxNG-validated XML, including the Publisher's layout language.
• einvoice — a Go library for reading and writing electronic invoices (ZUGFeRD / Factur-X / XRechnung).

I also maintain a few forks of upstream projects with patches that matter to me (css, barcode, go-lua). Most of these track upstream loosely; have a look at the individual repositories if you need details.

• Website: https://www.speedata.de
• Documentation: https://doc.speedata.de
• Commercial support, training, custom development: https://www.speedata.de/en/contact/

Based in Berlin, working with publishers, agencies and in-house teams worldwide.