# Description of Changes A few changes to improve things in the engine: - Changed the PDF to Markdown code to be a real tool in Java, to remove the need for the `pdf_ingest` code, which looked a bit like an agent but wasn't behaving as an agent. It's now just covered automatically by the edit agent. - Noticed that 0-parameter-endpoints were previously being ignored by the `tool_models` generator, so some tools which require no params were being mistakenly excluded. - Removed tools which currently never succeed like Add Stamp, Cert Sign, and Overlay, because they require the supporting files to be sent in a different location in the API call, which we don't currently do. Ideally, we'd add proper support for this, but we're better off now removing support for these tools rather than just have them crash. We can re-add these tools in a future PR properly.
Stirling PDF - The Open-Source PDF Platform
Stirling PDF is a powerful, open-source PDF editing platform. Run it as a personal desktop app, in the browser, or deploy it on your own servers with a private API. Edit, sign, redact, convert, and automate PDFs without sending documents to external services.
Key Capabilities
- Everywhere you work - Desktop client, browser UI, and self-hosted server with a private API.
- 50+ PDF tools - Edit, merge, split, sign, redact, convert, OCR, compress, and more.
- Automation & workflows - No-code pipelines direct in UI with APIs to process millions of PDFs.
- Enterprise‑grade - SSO, auditing, and flexible on‑prem deployments.
- Developer platform - REST APIs available for nearly all tools to integrate into your existing systems.
- Global UI - Interface available in 40+ languages.
For a full feature list, see the docs: https://docs.stirlingpdf.com
Quick Start
docker run -p 8080:8080 docker.stirlingpdf.com/stirlingtools/stirling-pdf
Then open: http://localhost:8080
For full installation options (including desktop and Kubernetes), see our Documentation Guide.
Resources
Support
- Community: Discord
- Bug Reports: GitHub Issues
Contributing
We welcome contributions! Please see CONTRIBUTING.md for guidelines.
This project uses Task as a unified command runner for all build, dev, and test commands. Run task dev to get started running the editor, run task to see the most common commands, or see the Developer Guide for full details.
For adding translations, see the Translation Guide.
License
Stirling PDF is open-core. See LICENSE for details.

