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Encode and sign JWTs with HS256 on your device.
- On your device
- No signup
Private on your device
Your information stays on your device and is not uploaded.
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Generate JWTs with subject, issuer, audience, issued-at, and expiry claims. Optionally sign with HS256 using a secret you provide.
How to use this tool
1. Paste source text, code, or data into the JWT Generator input panel. 2. Choose transform or validation options shown for JWT Generator. 3. Run JWT Generator or read automatic output. 4. Review errors or diff output carefully. 5. Copy the transformed result. Processing runs on your device; inputs are not uploaded to our server.
Worked example
Example: paste a small sample input into JWT Generator, run the transform or validation, and compare the output with the before text—fix any syntax errors reported before copying.
How it works
Fill in standard JWT claims—subject, issuer, audience, and expiry—plus an HS256 signing secret to mint a new token from scratch. Generation runs entirely on your device; secrets and payloads are never uploaded. Use this when you need a sample token for local API testing or documentation, not when validating an existing credential.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data stays on your device and is not uploaded.
FAQ
Frequently asked questions
Is JWT Generator free?
Yes. It is free to use and you do not need to sign in or create an account.
Is my data private?
See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.
Can I use JWT Generator on mobile?
Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.
Related pages
- JWT tools — compare developer tools and read FAQs
- Browse all free online tools on Utilnivo
- Explore more developer tools on Utilnivo
- JWT Encoder — Encode and sign JWTs with HS256 on your device.
- JWT Decoder — Decode JWT header, payload, and expiry—including Bearer tokens—on your device.
- UUID Generator — Generate UUIDs for apps, tests, and databases.
- JSON Formatter — Format, minify, and validate JSON with optional key sorting.
- JSON Compare — Compare two JSON documents and list structural differences.
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