Recently I wanted to preserve a diff between two branches. If it’s a pull request, that’s easy, as pull requests normally remain visible even if closed. But I didn’t want to create one just for preserving a diff.

Luckily, GitHub and GitLab both provide a way to view the diff between any two branches, using this URL format:

For example:

In fact, the SOURCE and TARGET don’t have to be branches, they can be any ref, for example commit SHA, even short versions, like this:

Just be careful, if you shorten too much, they might not remain unique forever!

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