Stirling PDF – Open‑Source Alternative to Acrobat

Stirling PDF is a powerful, open‑source PDF platform that replaces Adobe Acrobat on desktop, in the browser, and on your own servers.

Run it as a personal app or deploy it centrally with a personal API to edit, sign, redact, convert, and automate PDFs locally.

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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 and APIs to process millions of PDFs.
• Enterprise‑grade – SSO, RBAC, auditing, and flexible on‑prem deployments.
• Developer platform – REST APIs, SDKs, and on‑prem AI integrations for PDF‑centric apps.
• Global UI – Interface available in 40+ languages.

For a full and always up‑to‑date 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

Resources

• Documentation: https://docs.stirlingpdf.com
• Homepage: https://stirling.com
• API Docs: https://registry.scalar.com/@stirlingpdf/apis/stirling-pdf-processing-api/
• Server Plan & Enterprise: https://docs.stirlingpdf.com/Paid-Offerings

Support

• Community Discord: https://discord.gg/HYmhKj45pU
• Bug Reports: https://github.com/Stirling-Tools/Stirling-PDF/issues

Contributing

• Contribution Guidelines: CONTRIBUTING.md
• Developer Guide: devGuide/DeveloperGuide.md
• Translation Guide: devGuide/HowToAddNewLanguage.md

License

Stirling PDF is open-core. See LICENSE for details.