JWT Token Generator
Generate and decode JWT tokens online for free. Create JSON Web Tokens with custom payloads.
このツールについて
Generate and decode JSON Web Tokens (JWT). Build custom payloads, choose signing algorithm, and inspect existing tokens. All processing happens locally in your browser.
使い方
Enter Payload
Add your JWT claims as JSON.
Set Secret
Enter a signing secret and choose algorithm (HS256/HS512).
Generate or Decode
Generate a token or paste one to decode and inspect.
活用シーン
API Auth Testing
Create test JWT tokens for API authentication testing.
よくある質問
Is my secret key safe?
Yes. Everything runs locally. Your secret never leaves your browser.