JWT Generator
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Generate sample JWTs with common claims.
- On your device
- No signup
Private on your device
Your information stays on your device and is not uploaded.
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Build JSON header and payload objects, then encode an unsigned JWT or sign with HS256. Secrets stay on your device and are not uploaded.
How to use this tool
1. Paste source text, code, or data into the JWT Encoder input panel. 2. Choose transform or validation options shown for JWT Encoder. 3. Run JWT Encoder 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 Encoder, run the transform or validation, and compare the output with the before text—fix any syntax errors reported before copying.
How it works
Provide JSON header and payload objects, pick HS256 or unsigned (none), and optionally supply a secret to sign the assembled token. Encoding happens locally in your browser so custom claims and keys stay private. Choose this when you already have header and payload JSON and need a compact JWT string for curl, Postman, or unit tests.
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 Encoder 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 Encoder 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 Generator — Generate sample JWTs with common claims.
- JWT Decoder — Decode JWT header, payload, and expiry—including Bearer tokens—on your device.
- Base64 Encoder & Decoder — Encode and decode text with Base64.
- 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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