Toolara.io
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JWT Decoder

Decode JWT header and payload instantly in your browser.

Header

{
  "alg": "HS256",
  "typ": "JWT"
}

Payload

{
  "sub": "1234567890",
  "name": "Toolara",
  "iat": 1516239022
}

Signature

signature

Decoding only — signature verification is not performed in the browser.

About this tool

Decode JWT header and payload online without sending tokens to a server backend for parsing. Inspect claims quickly during auth debugging.

  • Decode header and payload JSON
  • View signature segment separately
  • Client-side decoding only (no signature verification)