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JWT payload inspector

Decode JWT header and payload; signatures are not verified.

Free

Decode JWT header and payload; signatures are not verified. Inspect the JSON inside a three-part JWT by decoding its Base64URL header and payload. The result explicitly reports signatureVerified as false instead of implying trust.

◈ Local processingFree

How to use

  1. Enter your text, values, or image.
  2. Adjust the options and run the tool.
  3. Copy or download your result.

Worked example

Example input

Input: eyJhbGciOiJub25lIn0.eyJzdWIiOiIxIn0.

Example result

{
  "header": {
    "alg": "none"
  },
  "payload": {
    "sub": "1"
  },
  "signatureVerified": false
}

Limitations and details

This does not validate signatures, expiration, issuer or audience; decoded claims must never be used as authorization proof.

Inputs and options

Input
Text

Frequently asked questions

Is this tool free and private?

Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.

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