Create and sign JWTs with a custom payload and secret key.
Create signed JWT tokens with HMAC (HS256, HS384, HS512). All signing happens in your browser.
Supported alg: HS256, HS384, HS512
iat is set automatically to current time when you generate.
Shortcut: Ctrl+Enter or Cmd+Enter to generate
Create JWTs for development and testing. Use standard claims like sub, iat, exp, iss, aud. Signing uses the Web Crypto API in your browser—100% browser-side, no server, no data sent.
After generating a token, inspect claim timing and token structure in our JWT encoder decoder to validate header, payload, exp, nbf, and iat values before using it in your auth flow.
Create and sign JWTs with a custom payload and secret key. Use it in your browser without uploading files for typical workflows.
Create and sign JSON Web Tokens (JWTs) online with HS256, HS384, or HS512. Enter header, payload, and secret to generate a signed JWT instantly — fully browser-based. Runs locally in your browser when supported—no upload required for normal use. Designed for quick everyday tasks with clear, copy-friendly output.
Concise answers for common searches — definitions, steps, and comparisons.
Create and sign JWTs with a custom payload and secret key.
JWT Generator (/jwt-generator) runs in your browser when supported—inputs are not uploaded to EverydayTools servers.
Load JWT Generator on EverydayTools—no account required.
Type, paste, or upload depending on what the tool accepts.
Results update in your browser for typical use cases.
Copy the output or use download/export when available.
Common real-world scenarios where this tool saves time.
Create and sign JWTs with a custom payload and secret key.
Use when you want results without uploading files—local browser processing when the tool supports it.
Open JWT Generator in any modern browser for quick checks with copy-friendly output.
Step-by-step chains that connect related tools for common tasks.
How this EverydayTools page compares for typical use.
| Aspect | EverydayTools | Typical alternative |
|---|---|---|
| Cost | Free | Paid apps or trials |
| Privacy | Browser-local when supported | Often requires cloud upload |
| Signup | Not required | Often required |
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A JWT is a compact, URL-safe token composed of three Base64url-encoded sections: header (algorithm and type), payload (claims like user ID and expiration), and signature. The server signs the header+payload with a secret key; the client sends the JWT in subsequent requests and the server verifies the signature to confirm authenticity.
HS256 (HMAC-SHA256) is the most widely supported and sufficient for most applications. HS384 and HS512 produce larger signatures but are otherwise equivalent for symmetric signing. All three are browser-safe and use the Web Crypto API. If you need asymmetric signing (public/private key), use RS256 or ES256 instead — those are not supported in this tool.
No. Signing runs entirely in your browser using the Web Crypto API. Your secret key and payload never leave your device. Do not use real production secrets in any browser-based tool; use a dedicated key management system for production JWTs.
An API key is a static opaque string — the server looks it up in a database to authenticate. A JWT is a self-contained token — the server verifies the signature without a database lookup. JWTs carry claims (user ID, roles, expiry) and expire automatically; API keys do not expire unless revoked.
Create and sign JWTs with a custom payload and secret key.
JWT Generator keeps typical inputs on your device—nothing is uploaded to EverydayTools servers for core calculations.
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Reviewed by EverydayTools Editorial Team on 2026-05-28.