ArticleWeb & API Security
What Is a JWT? JSON Web Tokens Explained (2026)
A JWT is a signed bundle of JSON claims. Here is how to read one, why decoding is not verifying, and how to check for the classic JWT security flaws.
Syed Zada Abrar · 9 min
Published work tagged JWT.
A JWT is a signed bundle of JSON claims. Here is how to read one, why decoding is not verifying, and how to check for the classic JWT security flaws.
Found a number like 1700000000 in a log, JWT or API response? Learn what Unix epoch time means, how to tell seconds from ms, and why it matters for tokens, fore…