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Cybersecurity
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JWT Builder
Cybersecurity
JWT Builder
Build and sign JSON Web Tokens with HS256 or unsigned — all computation in browser.
algorithm
HS256
none
header (auto)
{"alg":"HS256","typ":"JWT"}
payload
+iat
+exp
+nbf
{ "sub": "1234567890", "name": "Jane Doe", "iat": 1776281890, "exp": 1776285490 }
secret
build JWT
signing uses Web Crypto API · secret never leaves browser