db-migration-test failed on all three upgrade fixtures (v2.0.0, v2.5.0, v2.10.0) with: Column "ULS1_0.SERVER_QUANTITY" not found. ddl-auto=update cannot add a NOT NULL column to a table that already holds rows, and user_license_settings always does - it is a singleton created at first boot. Hibernate logs the failed ALTER and carries on, so the column never exists and the next SELECT blows up. Every upgrading installation would have hit this, not just the fixtures. server_quantity and user_block_size are display-only; the enforced limit is licenseMaxUsers, which is unchanged. They do not need to be in the database at all. ApplicationProperties.Premium already holds them, repopulated on every licence verification - at boot and on the weekly refresh - so the admin payload can read them straight off the verified licence. That removes the schema change entirely rather than working around it with a column default, which is the smaller and safer fix. Also resets the breakdown at the top of verifyLicense. Without persistence the values live only in memory, so removing or invalidating a licence would otherwise leave the previous server count there and the UI would keep reporting capacity the installation no longer has.
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.

