Developer guides

Practical notes for working with JSON and JWTs.

JWT decoding versus signature verification

Know what a decoded token can show and what your application still needs to verify.

How to compare two JSON API responses

Spot changed fields, missing keys, and array order differences.

How to fix invalid JSON

Find common JSON syntax errors and fix them without uploading your data.

Base64 versus URL encoding

Choose the right encoding for text, query values, and URL-safe Base64.