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JWT Encoder/Decoder

Header
Payload
Secret Key

Comments

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What is JSON Web Token (JWT)?

JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed.

JWTs can be signed using a secret (with the HMAC algorithm) or a public/private key pair using RSA or ECDSA. A JWT consists of three parts separated by dots:

  • Header: Contains the hashing algorithm (e.g., HS256, RS256).
  • Payload: Contains the claims (e.g., user info, expiration).
  • Signature: Used to verify that the message wasn't changed along the way.

How to use this tool?

Manage and debug your JWT tokens with ease:

  1. 1

    Decode Tab: Paste your encoded token on the left to immediately see the header and payload on the right.

  2. 2

    Verify Signature: Enter your secret or public key in the bottom-right section to check the token's validity.

  3. 3

    Encode Tab: Customize your header and payload JSON in the textareas.

  4. 4

    Select Algorithm: Choose from HMAC, RSA, or ECDSA algorithms in the dropdown.

  5. 5

    Provide Key: Enter your secret or private key (use Sample Key for quick testing).

  6. 6

    Generate: Click 'Encode JWT Token' to create your secure token instantly.