License library / Copyleft software
Mozilla Public License 2.0
Use, modify and distribute, including in larger proprietary works; files covered by the MPL that you change and distribute must stay under the MPL with their source available.
SPDX MPL-2.0 Version 2.0 Official text
Uses at a glance
| commercial use | Permitted |
|---|---|
| production deployment | Permitted |
| modification / derivatives | Permitted |
| redistribution | Permitted |
| sublicensing | Not documented |
| AI model training | Needs human review |
| inference-time use (RAG, prompts, generation) | Permitted |
Why some uses need review
AI model training. The license grants broad rights but attaches conditions (such as keeping notices) to copies and adaptations. Whether a trained model, or its output, is a copy or adaptation that carries those conditions is legally unsettled, and in some places training may fall under an exception such as fair use. A human reviewer should confirm this use for your case.
Duties
- license notice
- release distributed derivatives under the same license
- provide source code with distributed derivatives
Notes
- Copyleft applies file by file.
- Executable forms may be distributed under different terms if the source of covered files stays available under the MPL (section 3.2); general sublicensing is not documented.
Resources under this license
No resource in the registry is published under this license yet.
For agents
curl -s https://www.rightshold.com/v1/licenses/check -H 'content-type: application/json' \
-d '{"license":"MPL-2.0","intended_use":{"commercial_use":true,"deployment":true}}'Reading version 2026-10-09 by the Rightshold rights desk; reference hash b6ab747e56730b7bbc39f381a8925acbf393c6909525d8d3666d5ec35bd35f68 identifies this license version. The license text governs; this is not legal advice.