Setting up a server task usually means googling “cron expression syntax” one more time to double-check the minute/hour/day/month/weekday order. pomiai’s Cron Expression Generator lets you build an expression by clicking through each field, and paste in an existing expression to see exactly what it means. It supports both the standard 5-field format and the extended 6-field format with seconds.
Try it right now
No install, no sign-up — use it right away.
When this comes in handy
- Scheduling recurring server jobs like backups or log cleanup
- Checking exactly when an existing crontab expression will run
- Building precise schedules with the extended 6-field format down to the second
- Quickly generating common schedules like “every midnight” or “weekdays at 9am”
How to use it
- Fill in the minute, hour, day, month, and weekday fields by clicking or typing.
- Extend to the seconds field if you need the 6-field format.
- Copy the finished expression with one click.
- Or paste in an expression to see exactly what schedule it represents.
Frequently asked questions
What’s the difference between standard and extended cron?
Standard cron uses 5 fields — minute, hour, day, month, weekday. Extended cron adds a seconds field for a 6-field format. Which one you need depends on your scheduler (Linux crontab, Quartz, etc.), so check that first.
Can I check whether an expression I already have is correct?
Yes. Paste in the expression and it instantly explains what each field means and when it will run.
Are there presets for common schedules?
Yes, common presets like “every midnight” or “weekdays at 9am” can be applied with a single click.
Do I need to sign in or create an account?
No. It runs directly in your browser with no install or account required, and nothing you enter is sent to a server.
Explore more free pomiai tools → checkpomi.com · YouTube @pomiai_official