Regex Example
JWT Segment Pattern
Validates a URL-safe Base64 JWT segment.
Regex Pattern
^[A-Za-z0-9_-]+$
Test Cases
- eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9 - match
- abc+/== - no match
- abc_123-XYZ - match
Edge Cases
- Does not verify JWT structure or signature.
- Padding is optional in Base64URL encoding.