Devsdesk
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JWT Decoder

Decode JWT headers and payloads locally — your token is never sent anywhere.

Paste a JSON Web Token to inspect its header and payload. All decoding happens in your browser; tokens are not logged or transmitted. We never verify signatures here — signature verification needs your secret, which should never leave your servers.

Your token is decoded entirely in your browser and never sent to a server. We do not verify signatures — that requires your secret, which should never leave your servers.
{
  "alg": "HS256",
  "typ": "JWT"
}
{
  "sub": "1234567890",
  "name": "DevsDesk",
  "iat": 1700000000,
  "exp": 9999999999
}
Issued at2023-11-14T22:13:20.000Z
Expires2286-11-20T17:46:39.000Z
StatusValid (not expired)

FAQ

Is my token sent to a server?

No. We decode tokens entirely client-side. A token is just three base64-encoded JSON blobs joined by dots.

Why don't you verify signatures?

Verifying a signature requires the signing secret. You should never paste that into a website — verify on your own server instead.

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