UtilStore

JWT Encoder

Create and sign JSON Web Tokens

Encoding & Security

Keep your secret key safe. Never expose it in client-side code.

.

JWT Structure

Header - Algorithm & token type
Payload - Claims & data
Signature - Verification

Common Claims

iss - Issuer
sub - Subject
aud - Audience
exp - Expiration
nbf - Not Before
iat - Issued At
jti - JWT ID

What is a JWT Encoder?

A JWT encoder creates signed JSON Web Tokens from a header, payload, and secret key. Supports HS256, HS384, and HS512 algorithms. Useful for generating test tokens during API development without a backend server.

Frequently Asked Questions

Which algorithms are supported?

HMAC-based: HS256, HS384, and HS512.

Can I use these in production?

They are valid JWTs, but for production, generate tokens server-side with properly managed secrets.

What should I put in the payload?

Common claims: sub (user ID), name, email, role, iat (issued at), exp (expiration timestamp).

Detailed Guide & Usage

A JWT encoder creates signed JSON Web Tokens from a header, payload, and secret key. Supports HS256, HS384, and HS512 algorithms. Useful for generating test tokens during API development without a backend server.

How to Use:

  1. Input your JSON header configuration.
  2. Provide the payload claims data.
  3. Provide a test secret.
  4. The signed JWT token will be generated dynamically.

FAQ

Related Utilities

Explore All Tools

Base64 Encoder/Decoder

Encode and decode Base64 strings

URL Encoder/Decoder

Encode and decode URLs

JWT Decoder

Decode JSON Web Tokens

Password Generator

Generate secure passwords