JWT Encoder

Create and sign JWTs in your browser. Edit header and payload, sign with an HMAC secret — files stay on your device.

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Edit the token or JSON — both stay in sync locally.

Encoded JWT

Decoded JSON

Secret

Nothing leaves this device. No account required.

Encode and sign JWTs in the browser

Edit the header and payload JSON on the right. Formatly rebuilds the encoded JWT on the left as you type. Provide an HMAC secret to sign with HS256, HS384, or HS512 — signing runs locally and the secret never leaves your device.

Prefer inspecting an existing token? Open the JWT Decoder.

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