Tools › Cron Expression Parser

Cron Expression Parser

Paste a cron expression to translate it into plain English, validate every field, and preview the next run times. Supports 5-field and 6-field (with seconds) crontab syntax, ranges, lists, steps, month/weekday names and @daily-style shortcuts. Everything runs locally in your browser — nothing is uploaded.

Cron expression

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Field breakdown

Field	Value	Allowed

Next run times

Cron syntax cheatsheet

┌───────────── minute (0–59)
│ ┌─────────── hour (0–23)
│ │ ┌───────── day of month (1–31)
│ │ │ ┌─────── month (1–12 or JAN–DEC)
│ │ │ │ ┌───── day of week (0–7 or SUN–SAT, 0 & 7 = Sunday)
│ │ │ │ │
* * * * *

Operators

* any · , list · - range · / step. e.g. */15, 1-5, 0,30.

Names

Use MON-FRI or JAN,JUL instead of numbers — case-insensitive.

Shortcuts

@hourly, @daily, @weekly, @monthly, @yearly all expand automatically.

Seconds

Add a 6th leading field for seconds, e.g. */30 * * * * * every 30 seconds.

Day-of-month & week

When both are restricted, a run fires if either matches (standard cron behaviour).

Private

Parsing and next-run math happen in your browser — nothing is uploaded.

Cron Expression Parser

Cron syntax cheatsheet

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