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JWT Builder

Create JSON Web Tokens with custom headers, payloads, and signatures.

JWT buildercreate JWTJWT generatorJSON Web Token creator
Header
Payload
Add Claim:
Secret Key⚠️ Demo only - real signing requires server-side implementation
Generated JWT
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiZW1haWwiOiJqb2huQGV4YW1wbGUuY29tIiwicm9sZSI6ImFkbWluIiwiaWF0IjoxNzg5NTQ1OTA0LCJleHAiOjE3ODk1NDk1MDR9.Q0pRWF9mbXR7JCsyOUBHTlVcY2pxeCEoLzY9REtSWWA

What is JWT Builder?

JWT Builder creates JSON Web Tokens with custom headers, payloads, and signatures. Define claims like expiration, issuer, and subject, then sign with a secret or generate example tokens.

Common Use Cases

API Testing

Create test tokens for authenticated endpoints.

Development

Generate tokens for local development.

Learning

Understand JWT structure by building tokens.

Documentation

Create example tokens for API docs.

How to Use This Tool

  1. Set the algorithm (HS256, RS256, etc.)
  2. Add payload claims (sub, iat, exp, etc.)
  3. Enter your signing secret
  4. Generate and copy the JWT

Related Tools

Jwt Decoder → Api Tester → JSON Formatter → Hmac Generator → Base64 Encoder →

Learn More

JWT Builder is a free online tool that requires no signup or installation. It works directly in your browser, keeping your data private and secure.