Guides & Tutorials
Comprehensive guides on JSON Web Tokens, encoding standards, and using TokenDecode for local development.
Understanding JSON Web Tokens (JWT)
A comprehensive introduction to what JWTs are, how they are structured, and why they have become the industry standard for stateless authentication.
Base64 vs Base64URL: What's the Difference?
Learn the exact technical differences between standard Base64 encoding and the URL-safe variant required by the JWT specification.
Advanced Token Inspection & Claims
A deep dive into registered JWT claims (iss, sub, aud, exp, nbf, iat, jti) and how to properly validate them in your application.
Formatting and Linting JSON Web Tokens
How to clean up messy token strings, strip whitespace, remove bearer prefixes, and format the underlying JSON payloads for readability.
Generating Secure Mock JWTs for Testing
Learn how to craft unsigned mock JWTs with randomized subjects and custom payload injection to test your frontend code locally.
The 5 Most Common JWT Security Flaws
A critical breakdown of the most dangerous JWT vulnerabilities, including algorithm confusion, weak secrets, and storing tokens in LocalStorage.