DevConvertor

Cron Expression Generator

Build a standard 5-field cron expression field by field, or paste one to validate it. Every valid expression is explained in plain English and shown with its next scheduled runs in your local timezone, so you can confirm the schedule before committing it to a crontab or CI config.

Standard 5-field cron (crontab, CI schedulers, Kubernetes CronJob)Not the 6-field Quartz format
0–59
0–23
1–31
1–12 or JAN–DEC
0–6 or SUN–SAT

Runs

Every minute, every day.

Next 5 runs (your local time)

  • Sat, Oct 17, 2026, 06:02 AM
  • Sat, Oct 17, 2026, 06:03 AM
  • Sat, Oct 17, 2026, 06:04 AM
  • Sat, Oct 17, 2026, 06:05 AM
  • Sat, Oct 17, 2026, 06:06 AM

Presets

ReadyDeveloper UtilitiesFree · No account required

Related tools

Timestamp ConverterConvert between Unix timestamps and human-readable dates.Time Zone ConverterConvert a date and time between time zones, with real DST handling.

Features

  • Build field by field, or paste an expression to validate it
  • Plain-English explanation of every valid schedule
  • Next five run times in your local timezone
  • Ranges, steps, lists, and month/day names
  • Twelve common presets

How to use

  1. Edit any field, or pick a preset to start from.
  2. Read the explanation and the next run times to confirm the schedule.
  3. Copy the expression into your crontab or CI configuration.

Example

0 9 * * 1-5 runs at 09:00 on Monday through Friday.

*/15 * * * * runs every fifteen minutes, every day.

FAQ

Which cron syntax does this use?
Standard 5-field Unix cron — minute, hour, day of month, month, day of week. That's what crontab, most CI schedulers, and Kubernetes CronJob use. It is not the 6- or 7-field Quartz format that adds seconds and years.
What happens when both day fields are set?
Standard cron treats them as OR, not AND: `0 0 13 * 5` runs on the 13th of the month and on every Friday. The plain-English explanation reflects that, because it's a common source of schedules firing more often than intended.
What timezone are the next run times in?
Your browser's local timezone. A real cron daemon runs in the server's timezone, so confirm which one your scheduler uses before relying on the times shown.
Are month and day names supported?
Yes — JAN–DEC and SUN–SAT work in place of numbers, including inside ranges like MON-FRI.