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Tools/Regex

JWT shape

What this is

Most JWS start with eyJ because {" is the start of JSON header. This is a sniff, not a parser. Paste the token into /jwt to inspect claims.

/eyJ[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+/g
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0In0.sig

Open in tester

FAQ

JWE?
Encrypted tokens have five segments. This pattern is JWS-only.

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