Tools

Engineer tools

Small utilities I keep reaching for, all of them client-side. No data leaves your browser.

JSON formatter & validator

{
  "hello": "world",
  "year": 2026,
  "tags": [
    "engineering",
    "security"
  ]
}

JWT decoder

Header

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

Payload

{
  "sub": "hussain",
  "role": "engineer",
  "exp": 1759999999
}

Signature

fPHk-cyhqM6sV3sV4LJgI0r7tcyOZE5gT1QkmTjFqVQ

expires: 2025-10-09T08:53:19.000Z

Everything runs in your browser — no token is sent to the server.

Hash generator

SHA-1…
SHA-256…
SHA-384…
SHA-512…

Computed locally via SubtleCrypto. Nothing is sent.