asbawy:~/tools$ ./run

/tools — offline_utils

Everything below runs in your browser. No network calls — paste away.

▸jwt decoder / token analyzer

input // paste token

header

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

payload

{
  "sub": "123",
  "name": "SecResearcher",
  "role": "admin",
  "iat": 1716269022
}

signature

signaturE_placeholdeR

✓ alg=HS256 — verify against secret/key