JWT Debugger & Decoder

Decode and inspect JSON Web Tokens (JWT) locally to view header, payload, and signature data.

Paste JWT Token

Header (Algorithm & Type)

Payload (Data & Claims)

Inspecting decoded JWT payloads (claims) to view user ID, scope, and roles.
Checking token expiration (exp) and issue time (iat) converted to human-readable dates.
Inspecting token headers to determine algorithm and key IDs.

Paste your token in the input box. It will automatically decode header and payload.
Never paste production sensitive credentials into random web tools. This utility runs 100% locally in your browser.

This is a local decoder that displays header and payload. It does not verify the signature cryptographic chain.

Decoded inside your browser tab using base64 URL decoding. No network calls are made.

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