Cron Generator🔒 100% local

Generate cron expressions. Privacy-first, no server uploads, no tracking.

Input

Cron Generator: related tools

Reads a cron expression and says what it means: a plain-English reading, the five fields broken out one by one, and the next dates it fires in UTC. A short list of words (every minute, hourly, daily, weekly, monthly, yearly) is accepted in place of an expression. Fields are checked for stray characters and out-of-range numbers before any output appears, and the schedule is evaluated inside the page.

CRON Generator: how to use it

Type the expression, or one of the shortcut words.
Press Process.
Read the Schedule line for the meaning and the run list to sanity-check the timing.

CRON Generator: worked example

0 9 * * *becomes

Expression:   0 9 * * *
Schedule:     Every day, at hour 9, at minute 0
Fields:       minute=0 hour=9 day-of-month=* month=* day-of-week=*

Next 5 runs (UTC):
  2026-09-28 09:00 UTC
  2026-09-29 09:00 UTC
  2026-09-30 09:00 UTC
  2026-10-01 09:00 UTC
  2026-10-02 09:00 UTC

The run list is built from the clock at the moment you press Process and is always in UTC, so the dates move; the Schedule and Fields lines do not.

0 0 1 1 *becomes

Expression:   0 0 1 1 *
Schedule:     at day 1 of at month 1, at hour 0, at minute 0 (Jan)
Fields:       minute=0 hour=0 day-of-month=1 month=1 day-of-week=*

Next 5 runs (UTC):
  2027-01-01 00:00 UTC

Only one run appears. The search stops after roughly a year, so a yearly schedule runs out of window before it can collect five dates.

CRON Generator: when to use it

You inherited a crontab line and want to know what it does without counting fields.
You are reviewing someone else's expression in a pull request.
You want to confirm that an every-N-minutes expression lands on the minutes you intended.

CRON Generator: what it does not do

The checks are shallow. A zero step such as */0, or a six-field expression, passes on shape alone and can still be wrong.
Run times are UTC with no timezone switch, so a server clocked to local time can differ by hours from the list shown.
Day-of-month and day-of-week are read with OR semantics and daylight saving transitions are ignored, so cross-check anything that must fire exactly once.

🎨Cron Generator🔒 100% local