MIT License Generator

The MIT License explained

The MIT License is a short, permissive open-source license that originated at the Massachusetts Institute of Technology in the late 1980s and was popularized through the X Window System in the 1990s. At roughly 170 words, it is one of the most concise license texts in existence and consistently ranks as the most-used license on GitHub. It is OSI-approved (Open Source Initiative) and classified by the FSF as a GPL-compatible free software license.

The license grants very broad permissions: use, copy, modify, merge, publish, distribute, sublicense and sell. In exchange it imposes only two conditions: the original copyright notice and the full license text must be included in any copy or substantial portion of the software, and the code is provided as-is with a strong WARRANTY DISCLAIMER that limits the author's liability.

Projects that use it

The MIT License is the default for thousands of high-impact projects: jQuery, Node.js, Vue.js, React, Ruby on Rails, Express, Lodash and .NET Core, among many others. Its brevity and permissiveness make it especially attractive for small libraries, design systems and starter templates where contributors want maximum adoption with minimum legal friction.

MIT vs BSD vs Apache 2.0

• MIT vs BSD — essentially identical in spirit; MIT is shorter and avoids the 3-clause BSD "no-endorsement" rule.
• MIT vs Apache 2.0 — Apache 2.0 is explicit about patent grants and requires a NOTICE file; MIT is silent on patents, which exposes users to potential patent-troll claims from contributors.
• MIT vs GPL — GPL is copyleft (derivatives must remain GPL); MIT code can be relicensed inside a GPL project, but the result is governed by GPL terms.

Variants and SPDX

Several MIT-style variants exist: MIT-0 removes the attribution requirement, X11 is the original Expat/MIT predecessor and Expat is the canonical short form. To make tools and CI pipelines auto-detect the license, add the SPDX identifier at the top of each source file: // SPDX-License-Identifier: MIT. Then drop a LICENSE file with the full text at the repository root.

FAQ

Can I sell software released under MIT? Yes. The license explicitly allows selling and sublicensing. You can charge for the binary, support, hosting or anything you want.

Can someone fork my MIT code and make it closed-source? Yes — that is a defining feature of permissive licenses. The fork can be proprietary as long as the original copyright notice is preserved in the source.

Do contributors have to send improvements back? No. MIT is not copyleft, so there is no obligation to share modifications upstream.

Does MIT protect me against patent lawsuits? No. Unlike Apache 2.0, MIT contains no explicit patent grant. If patents are a real concern (medical, telecom, ML), prefer Apache 2.0.

Disclaimer. This generator produces a license template — it is not legal advice. For commercial products, dual-licensing strategies or patent-heavy domains, consult an attorney.