Frontend Development
Debug client authorization, inspect permissions, and check Bearer token lifetimes.
Token
JWT Decoder & Encoder
A secure tool for JSON Web Token (JWT) inspection: real-time Decoder and Encoder.
Every token consists of three dot-separated components: Header, Payload, and Signature. The Header contains token metadata, including token type and signing algorithm (HS256, RS256). The Payload stores claims about the subject, system timestamps (sub, iss, exp, iat), and custom data.
The Signature is a cryptographic hash of the Header and Payload, verifying data integrity and authenticity. Generation and validation of HMAC SHA-256 signatures are supported.
About the tool
Optimized for practical web development and security workflows.
Backend Development
Inspect outgoing service tokens, craft test JWTs, and verify HMAC signatures.
Security Auditing
Quickly verify token algorithms and detect insecure claims or misconfigurations.