JWT Token Parser
Professional JSON Web Token parsing and validation tool, supporting JWT decoding, structure validation, and expiration time checking
Security Warning
Signature verification is not cryptographically secure in this browser-based tool. This tool is designed for JWT structure analysis, payload inspection, and basic validation only. For production use or security-critical applications, always use proper server-side JWT libraries with real cryptographic signature verification.
JWT Input
Characters: 0
Validation Options
Allow time difference for server clock sync (0-30 minutes)
⚠️ Structure check only - not cryptographic verification
JWT Header
{}JWT Payload
{}Validation Results
Status:Invalid
Signature Structure:Not Checked
Expiration Status:Not Checked
Activation Status:Not Checked
Please enter JWT token
JWT Information Summary
Algorithm:-
Type:-
Issuer:-
Audience:-
Subject:-
JWT ID:-
Time Information
Issued At:-
Not Before:-
Expiration:-
Remaining Time:-
Batch JWT Validation
JWT Standard Field Descriptions
alg
Signature Algorithm
typ
Token Type
iss
Issuer
sub
Subject
aud
Audience
exp
Expiration Time
nbf
Effective Time
iat
Issued Time