1. Enter your input
Paste text, code, data, or the value you want to inspect.
JWT Decoder
Decode JWT tokens online without verifying signatures. Paste a token, inspect the header and payload JSON, and copy decoded claims for debugging.
2. Run the tool
Format, encode, decode, validate, test, or generate the result instantly.
3. Copy the output
Use the cleaned result in your code, docs, API workflow, or notes.
This tool decodes header and payload only. It does not verify signatures.
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When to decode a JWT
JWT decoding helps inspect authentication claims, API tokens, expiration fields, user IDs, scopes, and debugging payloads without sending the token to a server.
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JWT Decoder FAQ
Does this verify the JWT signature?
No. It decodes the header and payload only. Signature verification requires the correct secret or public key.
Is JWT decoding the same as decrypting?
No. Most JWT payloads are Base64URL encoded, not encrypted. Avoid pasting sensitive production tokens into tools you do not control.
What fields should I check?
Common fields include exp, iat, sub, iss, aud, scope, roles, and any custom claims used by your application.