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Chrome/Firefox browser extension to compare text against spdx license list
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SPDX License Diff

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Diff selected text against SPDX licenses and find the best match. This extension creates a browser button in Chrome and Firefox to compare any selected text against the SPDX License List.

The SPDX License List is a list of commonly found licenses and exceptions used in free and open source and other collaborative software or documentation. The purpose of the SPDX License List is to enable easy and efficient identification of such licenses and exceptions in an SPDX document, in source files or elsewhere. The SPDX License List includes a standardized short identifier, full name, vetted license text including matching guidelines markup as appropriate, and a canonical permanent URL for each license and exception.

spdx-diff in action


Get it from the Chrome Web Store or FireFox Add-ons.


Come help out!



We are initially GPL-3.0-or-later but will move to Apache-2.0 as soon as we refactor the stackoverflow code.

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