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JWT Decoder

Decode JWT header and payload values instantly in the browser without sending tokens anywhere.

Decode JWT header and payload

Header

Common claims

Subject (sub)
1234567890
Issued At (iat)
3/9/2024, 4:00:00 PM (2024-03-09T16:00:00.000Z)
Expiration (exp)
3/9/2024, 5:00:00 PM (2024-03-09T17:00:00.000Z)

Payload

About this tool

Use the Utiloom JWT Decoder to inspect token header and payload data, review claims, and quickly debug auth flows.

  • Paste a JWT and decode the header and payload immediately.
  • View common claims like expiration, issued at, issuer, and audience in readable form.
  • Decoding happens in the browser so tokens are not sent to a server.

How to use JWT Decoder

Open the interactive panel above, enter your content, and review the output instantly. Utiloom keeps processing in the browser whenever possible so you can move faster without adding server complexity.

Why people use this tool

Search-friendly utility pages work well when they answer a focused job clearly. This page includes descriptive metadata, structured copy, and FAQs to support both visitors and search engines.

Frequently asked questions

Does this tool verify JWT signatures?

No. This tool decodes readable parts of the token, but it does not validate the signature.

Is my token uploaded anywhere?

No. JWT decoding runs entirely in your browser.