Convert tools

JWT Decoder

Decode a JWT header and payload in your browser and inspect JSON claims without sending the token to a server.

Convert in your browser · No sign-up

Decoding does not verify the signature, issuer, audience or expiration. Do not treat decoded claims as authenticated. Encrypted JWE is unsupported.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Decode a JWT header and payload in your browser and inspect JSON claims without sending the token to a server.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

eyJzdWIiOiIxMjMifQ → {"sub":"123"}

Details and limitations

Decoding does not verify the signature, issuer, audience or expiration. Do not treat decoded claims as authenticated. Encrypted JWE is unsupported.

Text stays in your browser; it is not sent to a conversion server.

FAQ

JWT Decoder — What are the supported inputs and limits?

Decoding does not verify the signature, issuer, audience or expiration. Do not treat decoded claims as authenticated. Encrypted JWE is unsupported.

Format references

Tool page updated: