Outils · Texte · Décodeur JWT · Guides
Guides pour Décodeur JWT
Trois lectures courtes : pourquoi c'est utile, comment faire, et un cas d'usage précis.
Why APIs Traded Server-Side Sessions for a Signed Token
A server-side session is simple and instantly revocable, but it needs a lookup every single server can reach on every request. A JWT trades that lookup for a signature - and gives up instant revocation to get it.
Lire le guideHow to Check Whether a JWT Has Expired, Without Doing the Epoch Math Yourself
A JWT's exp claim is a raw Unix timestamp - meaningless at a glance. Paste a token and the expiry, not-before, and issued-at claims come back as real dates with a plain valid/expired/not-yet-valid label, no manual conversion required.
Lire le guideDebugging a 401 by Reading What Your JWT's Claims Actually Say
A request that worked five minutes ago now returns 401, and the token looks fine at a glance. The fastest way to find out what changed is to decode it and read the claims in order, not guess.
Lire le guide