Cron Schedule Lint for crontab, Kubernetes CronJob, GitHub Actions, Spring and EventBridge
Names every schedule line in the file you have open that fires at the wrong hour, twice, or never at all - and prints the next three times each one really fires, in the zone that actually applies.
Free, with no key, for the file above: every rule and every run time. Get the full version - $29 for the whole repository as one calendar, the CSV/JSON/HTML export and the CI gate. $29 once - one licence key per person or team seat. Healthchecks.io Business, the ordinary cron monitor, is $20 every month and only tells you after a run was already missed.
In the full version
Every schedule in the repository merged into one calendar instead of the single file you have open
The whole calendar as CSV, JSON or HTML for a change review
Machine output that exits non-zero so a pipeline can stop a merge that adds a schedule which never fires