This is a small shell script that I wrote to help with encoding/decoding Base64-URL encoded data. It basically invokes the platform’s base64 and sed to turn regular Base64 into Base64-URL.

By the way, this is using the following markup to embed a Gist in Github Pages. You’ll need to install the jekyll-gist gem to see this locally:

{% gist 6bb597fc600932c6c737aab3b402147c %}