Private browser-based JWT inspection

JWT Debugger

Decode, inspect, verify, and create JSON Web Tokens without sending your token or secret anywhere.

Input

Encoded Token

Waiting for tokenSignature not checked

Decoded

Header

{}

Decoded

Payload

{}

Claims

Timeline

Verify

Secret or Public Key

Base64URL

Verification supports HS, RS, PS, and ES algorithms in the browser. EdDSA tokens can be decoded here, but are not verified by Web Crypto in this static build.

Create

Header

Create

Payload

Sign

Secret

HS algorithms use a shared secret. RS, PS, and ES algorithms use a PKCS8 PEM private key.

Output

Generated Token

What It Checks

Readable claims, signature status, and token timing

Decode

Header and payload are parsed locally with helpful formatting and JSON validation.

Verify

Decode, verify, and generate JSON Web Tokens, which are an open, industry standard RFC 7519 method for representing claims securely between two parties.

Generate

Create signed tokens for testing flows, demos, and local development.