Cron Expression Parser
Plain-English description of any cron expression.
How to use
Runs entirely in your browser. Live updates or click to run. No signup, no tracking, no data sent anywhere.
Part of 71 free tools by Auburn AI. Category: Dev Tools
About this tool
Cron Parser takes a cron expression and translates it into plain language, then shows you the next several scheduled execution times. It is built for developers, sysadmins, and DevOps folks who work with scheduled tasks in Linux, crontab files, CI pipelines, or cloud schedulers and want to verify an expression before deploying it. No more guessing whether that five-field string runs at midnight or noon.
Reach for this tool whenever you are writing a new cron job and want to confirm the schedule matches your intent. It is equally useful when you inherit someone else’s crontab and need to decode what it actually does, or when debugging why a job fired at an unexpected time.
How to use it
- Type or paste your cron expression into the input field, for example: 0 9 * * 1-5.
- The parser instantly displays the expression broken down field by field: minute, hour, day, month, weekday.
- Read the plain-language summary to confirm the schedule matches what you intended.
- Review the list of upcoming execution times to spot any unexpected gaps or clustering.
- Adjust individual fields directly in the input and watch the results update in real time.
- Copy a corrected expression back into your crontab, config file, or scheduler when satisfied.
Pro tips
- Use the shorthand aliases like @daily or @hourly as valid input; the parser expands them so you can see the underlying five-field equivalent.
- Check the sixth-field seconds support if you are targeting Quartz or AWS EventBridge schedulers, which differ from standard Unix cron syntax.