Schedule tools

Browse schedule utilities

Cards follow the home catalog order for this category.

• ⏱

  Unix timestamp converter

  Client

  Epoch to date: seconds, milliseconds, ISO-8601, UTC and local time—in browser.

• ⏱

  ISO-8601 duration

  Client

  Parse P…/PT… into labeled parts and plain English, or build normalized duration strings—local only.

• ⏲

  Cron expression helper

  Client

  Human-readable schedule, next run times—standard 5-field cron in your browser.

• ⏲

  Cron expression builder

  Client

  Compose five-field cron strings with presets—copy for crontab or job schedulers; local only.

• ⏱

  Stopwatch & lap timer

  Client

  Start, stop, reset, and record lap times with centisecond display—runs locally in your browser.

• ⏳

  Countdown timer

  Client

  Set a target local date and time—see days, hours, and seconds remaining; updates in your browser.

• 🌐

  World clock & time zones

  Client

  Compare IANA time zones side by side with the same instant—no server round-trip.

Nearby workflows on Toolcore

• Unix timestamp — when logs mix seconds, milliseconds, and ISO strings.
• ISO-8601 duration — for PnY…M…DT…H spans next to absolute times.
• Cron expression — to see upcoming fires after the instant is clear.
• Timezone converter — when operators think in local offsets instead of UTC.

Common use cases

• Start from the timestamp tool when logs mix seconds, milliseconds, and ISO strings and you need a single normalized view.
• Use the ISO-8601 duration page when APIs return PnYnM or PT strings and you need a labeled breakdown or a canonical spelling.
• Use the cron page when documenting or debugging a five-field schedule and you want human-readable next fire times.
• Open the time zone tool when planning a meeting across regions and you need the same instant in multiple IANA zones.

Common mistakes to avoid

• Mixing up seconds and milliseconds

  Always check the unit your source system uses—many APIs use seconds, JavaScript Date often uses milliseconds.

FAQ