Does this verify JWT signatures?

This tool decodes and displays claims. Signature verification depends on your keys and is separate from viewing payload data.

Is JWT decoding private?

Yes. Tokens are decoded in your browser.

Can I decode expired tokens?

Yes. You can still inspect claims even if the token is expired.

JWT Decoder Online

Decode JWT tokens online to inspect header and payload claims. Free, private JWT decoder for developers.

Developer

Runs entirely in your browser — files stay on your device.

Signature is shown raw — not verified

JWT

Paste a token (Bearer prefix is stripped)

Header

{
  "alg": "HS256",
  "typ": "JWT"
}

Payload

{
  "sub": "1234567890",
  "name": "Korisa",
  "iat": 1516239022,
  "exp": 4102444800
}

Signature

signature

About JWT Decoder

Paste a JWT to inspect its header and payload instantly. Useful for debugging auth flows and checking claims.

Decoding is local — tokens are not sent to a server. Never paste production secrets into any online tool you do not trust; Korisa keeps processing on-device.

Frequently asked questions

Does this verify JWT signatures?: This tool decodes and displays claims. Signature verification depends on your keys and is separate from viewing payload data.
Is JWT decoding private?: Yes. Tokens are decoded in your browser.
Can I decode expired tokens?: Yes. You can still inspect claims even if the token is expired.

JWT Decoder Online

About JWT Decoder

Related tools

Frequently asked questions

JWT Decoder Online

About JWT Decoder

Related tools

Frequently asked questions