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Developer toolkit

JWT decode, regex tester, cron explainer, Unix time converter, and color formats — all in one place. Use the tabs or links like #jwt, #regex, etc.

Everything runs in your browser. JWT decoding does not verify signatures.

Header
{
  "alg": "HS256",
  "typ": "JWT"
}
Payload
{
  "sub": "1234567890",
  "name": "John Doe",
  "iat": 1516239022
}

Signature (opaque): SflKxwRJSMeKKF2QT4… (43 chars)

How it works

Small utilities—you tab in, tweak, bounce back.

  1. 01

    Pick a tab

    JWT decode, cron, regex, colors…

  2. 02

    Paste payloads

    Cron strings, bearer tokens safely.

  3. 03

    Run decode

    Expiry, cron English, regex matches live.

  4. 04

    Iterate quietly

    Adjust inputs until output feels right.

  5. 05

    Hash bookmark

    Share via URL fragments `#jwt`, etc.