Dev / ITpopular

JWT Decoder

Paste any JWT token to instantly decode its header, payload, and check expiry. Shows expiration in human-readable format. All processing is 100% client-side — your tokens never leave your browser.

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input · jwt token

how to use

  1. 1.Paste your JWT token into the input field
  2. 2.The header and payload are decoded automatically
  3. 3.Check the expiry field shown in human-readable time
  4. 4.Copy the decoded JSON output using the copy button

frequently asked

Is it safe to paste my JWT here?

Yes — all decoding runs entirely in your browser using JavaScript. No data is sent to any server.

Can this tool verify the JWT signature?

Signature verification requires the secret key. This tool decodes and displays the payload claims only.

What JWT algorithms are supported?

This decoder supports all standard JWT algorithms including HS256, HS512, RS256, RS512, ES256, and more.