JWT tools for decoding tokens and checking expiry claims
JWT problems usually come down to the visible claims: issuer, audience, subject, scopes, roles, issue time, and expiry. These tools make those values easy to inspect, while keeping the distinction clear between decoding a token and verifying a token.
Tools in this workflow
API & Auth
OpenJWT Decoder
Decode JWT headers and payloads, inspect claims, and check expiry fields at a glance.
API & Auth
OpenJWT Expiry Checker
Show whether a JWT is expired, valid, or missing expiry claims with readable timestamps.
Encoders & Decoders
OpenBase64 Encode / Decode
Encode plain text to Base64 or decode Base64 back to readable text with Unicode support.
Converters
OpenTimestamp Converter
Convert Unix seconds, Unix milliseconds, and ISO date strings with readable UTC and local output.