JWT Encoder
Encode JWT tokens from header and payload JSON with optional secret signature.
- 100% free
- Private in browser
- No signup
- No watermarks
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About JWT Encoder
JWT Encoder on TheToolss creates JSON Web Tokens from your header and payload. Supports HS256 signing with HMAC-SHA256.
How to use JWT Encoder
- Enter header and payload JSON.
- Add a secret key for signing.
- Copy the generated token.
Key features
- HS256 HMAC-SHA256 signing
- Unsigned tokens (alg: none)
- Base64URL encoding
- JSON validation
- One-click copy
Frequently asked questions
- Is this the reverse of JWT Decoder?
- Yes! Use JWT Decoder to decode tokens and JWT Encoder to create them.
- What do I need to enter?
- Just Header, Payload, Secret Key and Algorithm. Every field has a sensible default you can start from.
- Is my data uploaded anywhere?
- No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
- Does it work on a phone?
- Yes. The layout adapts to small screens and needs no app or signup.
- Is Free JWT Encoder Online free?
- Yes. Free JWT Encoder Online on TheToolss is free to use with no signup required for the core workflow.
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