SPDX License Diff

Name: SPDX License Diff
Rating: 5 (4 reviews)
Author: Alan Tse

Diff selected text against SPDX licenses

As of May 2026, SPDX License Diff has 720 users and a 5.00/5 rating from 4 reviews in the Developer Tools category.

Alan Tse Developer Tools★ Featured

Chrome Web Store ↗.crx

Users+217.2%

720

Rating0%

5.00

4 reviews

Reviews0%

Version

0.12.1

Manifest V3

History

5 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	227	5.00	4	0.12.1
Apr 21, 2026	240	5.00	4	0.12.1
May 6, 2026	232	5.00	4	0.12.1
May 17, 2026	217	5.00	4	0.12.1
May 31, 2026	234	5.00	4	0.12.1
Now	720	5.00	4	0.12.1

Permissions & access

Permissions: storageunlimitedStoragecontextMenusactiveTabscriptingoffscreen
Host access: *://*.spdx.org/*

Screenshots

About

This open source extension creates a browser button in Chrome to compare selected text against the SPDX License List (https://spdx.org/licenses/). It will then show the closest matching license and provide a redline showing differences against the canonical SPDX license text. This can be useful when trying to identify an open source license or determining if it has been changed.

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.

Released under GPL-3.0 (for now)

Release notes:
https://github.com/spdx/spdx-license-diff/releases