JWT Decoder
Processed locallyDecode and inspect JWT tokens. View header, payload, and expiry. No verification.
About JWT Decoder
The JWT Decoder inspects JSON Web Tokens without verification. Paste a token to see the header (algorithm, type) and payload (claims). The exp claim is parsed into an expiry badge—valid, expired, or expiring soon. JWTs are base64url-encoded, not encrypted. The payload is readable by design. This tool decodes locally—no server calls. Use for debugging auth flows, understanding token structure, or troubleshooting expired tokens. Never paste tokens containing sensitive data you wouldn't want visible. For signature verification, use your auth provider's tools.