Cron Schedule Overlap Checker

Compare two five-field cron expressions inside a bounded time window and list matching collisions.

Schedule A

Schedule B

Start UTC

End UTC

ReadyLists minute-level UTC collisions in the selected bounded window; at most 500 are displayed.

How to use this Cron Schedule Overlap Checker

Find UTC minutes where two standard Unix cron schedules run at the same time. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.