JWT Decoder
Decode a JWT to inspect its header and payload, formatted as readable JSON. Decoding happens locally — your token is never sent anywhere. Free and in-browser.
JSON Web Token
Header
{
"alg": "HS256",
"typ": "JWT"
}Payload
{
"sub": "1234567890",
"name": "Toolko User",
"iat": 1516239022,
"exp": 1793593600
}Expires 11/2/2026, 4:26:40 AM
Frequently asked questions
Is my token sent to a server?+
No — decoding is done locally in your browser, your token stays private.