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Dev & Data
JWT Decode
Decode a JSON Web Token's header and payload so you can inspect the claims. It does NOT verify the signature — never trust a token on decode alone.
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Worked example
HEADER
{
"alg": "HS256"
}
PAYLOAD
{
"user": "gg",
"admin": true
}
Learn the method
Frequently asked
Does it check the signature?
No. Decoding is not verification; a decoded token can still be forged.
Is the token sent anywhere?
No — it's split and Base64url-decoded locally.