Cron Expression Helper

A standard cron line has five space-separated fields in this order: minute, hour, day-of-month, month, and day-of-week. Each field accepts a wildcard (*), a single number, a step (*/n), a list (1,2,3), or a range (1-5). This tool reads those fields and turns the whole expression into one readable sentence like "At minute 0 past every hour."

No. The entire parser runs locally in your browser using JavaScript, so your cron expression never leaves your device and nothing is uploaded or stored. That makes it safe to paste schedules from private infrastructure, internal scripts, or production crontabs without any privacy concerns.

It handles the common Unix-style 5-field format, including wildcards (*), steps such as */15, comma lists like 0,30, and ranges like 1-5 or Monday-Friday. If you enter the wrong number of fields or an out-of-range value, it shows a friendly error explaining exactly what to fix.