Cron Expression Parser
/cron-parserParse and explain cron expressions in plain English. Validate schedules and preview next run times.
Cron expressions are compact, but nobody can read `*/15 9-17 * * 1-5` and know when the next job fires. This parser explains schedules in plain English and shows the next run times. It validates expressions and catches syntax errors before they break a pipeline. Parsing happens entirely in your browser.
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FAQ
Frequently asked questions
Everything you need to know about cron expression parser.
Which cron syntax is supported?
The standard five field syntax with wildcards, ranges, steps, and comma separated lists is supported, covering minute, hour, day of month, month, and day of week.
Can I see future run times?
Yes. The tool previews the next several scheduled run times computed from the current moment, so you can verify a schedule before deploying it.
Does it explain the schedule in plain English?
Yes. The expression is translated into a human readable sentence, such as describing that a job runs at a specific hour on specific days, making schedules easy to review.
How are day of week and day of month combined?
Standard cron behavior applies, and the parser follows the common convention where day of month and day of week are treated as an OR combination unless otherwise constrained.
Are 6 field and seconds based expressions supported?
No. This tool expects the standard five field format, so expressions with a leading seconds field or year field are not accepted and will produce a parse error.
Is my expression sent anywhere?
No. Parsing and run time calculation run entirely in your browser, so schedule definitions from your infrastructure stay local and are never transmitted.
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