JWT Decoder
100% Client-SideDecode and inspect JSON Web Tokens (JWT) safely in your browser. View header algorithms, payload claims, expiration timestamps, issued-at dates, and signature components with zero server transmission.
Decoded Standard Claims
| Claim Key | Standard Meaning | Raw Value | Interpreted Value |
|---|
How to Use JWT Decoder
Paste your encoded JSON Web Token (e.g. eyJhbGciOi...)
Review the formatted Header and Payload JSON with decoded human timestamps.
Verify if the token is active or expired, with exact time calculations.
Key Features & Privacy
Tokens are never transmitted over the network or logged anywhere.
Converts Unix epoch claims (exp, iat, nbf, auth_time) into readable local dates.
Color-coded Header (Red), Payload (Purple), and Signature (Cyan).
This tool runs entirely in your local browser runtime. No logs, analytics tracking, or remote server transmissions occur.
Related Tools
View all Developer Utilities →JSON Formatter
Format, pretty-print, validate, and minify JSON strings with instant syntax error detection, line indicators, and custom indentation.
JSON Validator
Validate JSON strings with detailed line and column error indicators, key counters, data type inspection, and payload sizing.
Base64 Encoder / Decoder
Encode and decode Base64 strings with full Unicode (UTF-8) character and emoji support, plus optional URL-safe Base64 formatting.