1. Decode JWT Payloads Without a Library JSON Web Tokens are everywhere in modern APIs, and their payload is just Base64URL-encoded JSON. When debugging auth issues, you don't need to fire up jwt.
Source: [Dev.to](https://dev.to/zhihu_wu_dea1d82af01a04d7/3-base64-tricks-every-developer-should-know-25p7)