MIT License
Do whatever you want. Just keep the copyright notice.
Commercial use
✓ Yes
Modify
✓ Yes
Distribute
✓ Yes
Must open source changes
✗ No
Must attribute
✓ Yes
Patent grant
✗ No
What this license means
The MIT License is the most popular open source license. It lets you use, copy, modify, merge, publish, distribute, sublicense, and sell the software — with essentially no restrictions. The only requirement is that you include the original copyright notice and license text in any copy or substantial portion of the software.
When you encounter this license
Use MIT-licensed tools freely in any project — personal, commercial, proprietary. You can bundle it, modify it, sell products built with it. Just keep the license file somewhere in your project. This is the easiest license to work with.
Watch out for
No patent grant — if the software implements a patented algorithm, the MIT license doesn't protect you from patent claims. No warranty, no liability — standard for all OSS licenses.
Tools using MIT License (397)
Opinionated code formatter
SDK and proxy to call 100+ LLM APIs in OpenAI format
Fast, reliable browser testing
Platform for universal React apps
Extremely fast Python linter and formatter, written in Rust
Open-source AI engine, run any model locally
Open source Slack/Teams alternative
Delightful JavaScript testing
Open source IDE for exploring and testing APIs
Open source fullstack Next.js framework with backend superpowers
TypeScript-first schema validation with type inference
Extremely fast bundler for the web
Express-inspired web framework for Go
A new type of shell
Enhanced ChatGPT clone with multiple AI providers
Open source notification infrastructure
Analytical in-process SQL database
DeepSeek + MiMo coding agent in terminal
Extremely fast DataFrame query engine
Wrap Gemini CLI, Antigravity, ChatGPT Codex, Claude Code, Qwen Code, iFlow as an OpenAI/Gemini/Claude/Codex compatible API service, allowing you to enjoy the free Gemini 2.5 Pro, GPT 5, Claude, Qwen model through API
This guide is for informational purposes only and does not constitute legal advice. For licensing decisions in commercial products, consult a qualified attorney.