JWT Decoder - Inspect JSON Web Tokens

Inspect JSON Web Tokens (Header & Payload)

Decode a JWT

JWT Decoding Results

Header (Decoded):
Payload (Decoded):

About JWT Decoder

  • This tool decodes JSON Web Tokens to inspect their contents
  • It does not verify the signature (requires secret key)
  • JWTs have three parts: Header.Payload.Signature
  • Header and Payload are Base64URL encoded JSON
  • Use this to debug or inspect JWTs during development

JWT Decoder is a free online tool that allows developers and security professionals to decode and inspect JSON Web Tokens (JWTs). Paste a JWT to instantly view its Base64URL-decoded header and payload in a readable JSON format. This tool helps you debug token claims like expiration (exp), issued at (iat), subject (sub), and more. No need for a secret key—this decoder does not verify signatures but is perfect for testing and development purposes.

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