Open Source License Quick Reference

Open Source License Quick Reference

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Free online open source license reference tool covering 24 major licenses including MIT, Apache 2.0, GPL, AGPL, LGPL, BSD, MPL, PostgreSQL, Zlib, EUPL and more. Detailed information on license types, permissions, conditions and limitations to help developers choose the right open source license.

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About Open Source License Quick Reference

Free online open source license reference tool covering 24 major licenses including MIT, Apache 2.0, GPL, AGPL, LGPL, BSD, MPL, PostgreSQL, Zlib, EUPL and more. Detailed information on license types, permissions, conditions and limitations to help developers choose the right open source license.

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User Guide

Key Features
  • Free online open-source license reference covering 24 major licenses, including MIT, Apache 2.0, GPL, AGPL, LGPL, BSD, MPL, PostgreSQL, Zlib, 0BSD, Artistic, CDDL, EUPL, OSL, WTFPL and more
  • Browse, search, or filter licenses by category — Permissive, Weak Copyleft, Copyleft, and Public Domain
  • Each license shows its type, permissions, conditions, and limitations in detail, helping developers quickly choose the right open-source license
How to Use
  1. Open the tool page — no download or installation needed; all data loads locally in your browser
  2. Type keywords in the search box (e.g., MIT, GPL), or click a category button to filter by Permissive, Weak Copyleft, Copyleft, or Public Domain
  3. Click any license card to open its details (type, permissions, conditions, and limitations); click "Reset" to clear the filters
Important Notes
  • This tool is completely free and requires no sign-up
  • Everything runs locally in your browser — your data never leaves your device
  • For reference only — verify the official license text and your project's needs before adopting a license

Frequently Asked Questions

What is Open Source License Quick Reference?

Free online open source license reference tool covering 24 major licenses including MIT, Apache 2.0, GPL, AGPL, LGPL, BSD, MPL, PostgreSQL, Zlib, EUPL and more. Detailed information on license types, permissions, conditions and limitations to help developers choose the right open source license.

How do I use Open Source License Quick Reference?

Open the tool page — no download or installation needed; all data loads locally in your browser Type keywords in the search box (e.g., MIT, GPL), or click a category button to filter by Permissive, Weak Copyleft, Copyleft, or Public Domain Click any license card to open its details (type, permissions, conditions, and limitations); click "Reset" to clear the filters

What should I know before using Open Source License Quick Reference?

This tool is completely free and requires no sign-up Everything runs locally in your browser — your data never leaves your device For reference only — verify the official license text and your project's needs before adopting a license

Is Open Source License Quick Reference free to use?

Yes, Open Source License Quick Reference is completely free. No download or installation required — it runs right in your browser.