JWT Decoder
Decode and inspect JWT token headers and payloads instantly — 100% client-side, no data sent to any server.
Token InputPaste JWT here
Payload
Decoded output will appear here
Paste a JWT on the left — it decodes automatically
About this tool
Decode Header & Payload
Instantly Base64Url-decode JWT headers and payloads with full syntax highlighting for easy reading.
Expiration Checker
See at a glance whether your token is still valid, expired, or when it was issued — no manual Unix timestamp math required.
Algorithm & Claims Info
Identify the signing algorithm, token type, and all registered claim names with inline RFC 7519 descriptions.