How to Read a Cron Expression (and See Its Next Run Times)
Published September 13, 2026 · 2 min read
Cron syntax is compact but not exactly intuitive — figuring out exactly when "*/15 9-17 * * 1-5" actually fires takes a moment of mental math. This tool parses the expression, explains each field in plain language, and calculates the next several real run times.
Try CRON ParserSteps
- 1
Open the Cron Parser tool
Go to the cron parser.
- 2
Enter your cron expression
Type the five-field schedule you want explained.
- 3
Parse
The tool breaks down each field — minute, hour, day, month, weekday.
- 4
Review the summary and next runs
See a plain-language explanation and the next several actual run times in your local time zone.
Frequently asked questions
Yes — ranges, lists, wildcards and step values are all parsed and explained correctly, matching standard cron syntax.
Your browser's local time zone, so the run times reflect what you'd actually see happen on your own clock.
Yes — when both day-of-month and day-of-week are restricted (not wildcards), cron's actual OR semantics between them are correctly applied, not a simplified AND.
Because parsing happens instantly, this is a quick way to double-check a schedule before deploying it, rather than waiting to see if it fires at the wrong time.