JSON Web Token Builder

Build, encode, and decode JSON Web Tokens (JWT) with custom claims.

Category: Networking · v1.0.0

Header

Algorithm

Type

Payload - Standard Claims

iss (Issuer)

sub (Subject)

aud (Audience)

jti (JWT ID)

iat (Issued At)

exp (Expires)

nbf (Not Before)

Custom Claims

Secret Key

Used for HMAC-SHA256 signing (client-side only)

Encoded JWT

About This Tool

This JSON Web Token Builder lets you create, encode, and decode JWTs with fully customizable headers, payloads, and signing options. It is built for backend developers, security engineers, and API architects who need to generate test tokens or understand JWT structure during development. The tool supports custom claims, multiple signing algorithms, and provides real-time encoding as you build your token.

How to Use

Configure the JWT header by selecting the signing algorithm
Add custom claims and payload data in the payload editor
Enter your secret key or signing credentials
Generate the encoded JWT and copy it for use in your application