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RegEx Tester & Cron Expression Builder
Test common JavaScript regular expressions and create standard five-field Cron schedules.
GUIDE
How to use RegEx Tester & Cron Expression Builder
Test common JavaScript regular expressions and create standard five-field Cron schedules. The tool is available directly in your browser with no account required.
- 1. Enter the required value, text, or file in the tool above.
- 2. Adjust any available options and run the tool when needed.
- 3. Review the result and copy or download it if the tool provides that option.
DETAILS
Test regular expressions and build recurring schedules
The RegEx panel runs a JavaScript regular expression against sample text. The Cron panel builds a standard five-field minute, hour, day, month, and weekday expression.
Example
Every Monday at 9:00 AM is written as 0 9 * * 1.
Good to know
Confirm both the Cron dialect and the scheduler time zone in the service where you deploy it.
Frequently asked questions
What does weekday 0 mean?
In common five-field Cron syntax, 0 represents Sunday and 1 represents Monday.
What do regex flags i and g do?
i ignores letter case, while g searches for multiple matches across the string.
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