How to Edit JWT Claims and Re-Sign Tokens
JWT Claim Editing
When to Edit JWT Claims
Use the claim editor when you need to tweak test tokens — change the subject, extend expiration, add custom claims, or regenerate a signed JWT after editing the payload — without spinning up a token issuer.
Workflow
- Paste an existing JWT and click Load claims, or edit the default header and payload JSON.
- Select an HMAC algorithm and enter your signing secret.
- Click Run to produce a newly signed token.
Security Note
This tool signs tokens locally for development and testing. Never embed production signing secrets in client-side code.
Frequently asked questions
Can I edit RS256 tokens?
You can load and edit the header and payload of any JWT, but re-signing is limited to HMAC algorithms (HS256/384/512). RS256 signing requires a private key.
Does loading a JWT verify the signature?
No. Loading decodes the header and payload only. Use the JWT Validator to verify signatures.