Cron Reader

Explain a crontab line and list the next runs.

Reset

Expression

Five fields — minute, hour, day of month, month, day of week — or a shortcut like @daily.

Next runs to list

The search looks four years ahead and gives up if nothing matches.

Presets

Rules are Vixie cron's, as in crontab(5).

Nothing yet: paste an expression and press the button.

What to watch for.

The Vixie special fields L (last day of the month) and # (third Friday) are deliberately not supported: a tool that accepted them would answer about a different scheduler than the one on your server. Times are computed in the server timezone, not the browser's.