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Cron expression explainer
Paste a cron expression and read what it means in plain English, then see its next runs in the time zone you pick. It handles the 5-field format and shortcuts like @daily, and points to the field that is wrong. Runs in your browser, nothing uploaded.
How to read a cron expression
- 1Type or paste a cron expression, or click an example
- 2Read the plain English sentence under the box
- 3Pick a time zone and how many runs to list
- A sentence and a table of the next run times.
What you get
- Plain English."*/15 9-17 * * 1-5" becomes a sentence about minutes, hours and weekdays.
- Next runs in any time zone.See 5, 10 or 25 upcoming times in your zone or any other, with UTC beside each.
- Nothing is uploaded.The expression is worked out by your browser.
What you can do
- Explain any standard 5-field cron expression: minute, hour, day of month, month, day of week.
- Use names like MON or JAN, ranges like 1-5, lists like 1,15 and steps like */10.
- Use the shortcuts @yearly, @annually, @monthly, @weekly, @daily, @midnight and @hourly.
- List the next 5, 10 or 25 runs, in your time zone or another, with the time in UTC and how far away it is.
- Copy the expression or the run times as text.
Good to know
- The explanation is written in English, also on the German and Dutch pages.
- Only 5 fields are supported. An expression with 6 fields, such as seconds or a year, shows an error.
- If both day of month and day of week are set, the job runs when either one matches, as in standard cron.
- Times follow the daylight saving rules of the zone. A time that does not exist on the clock change day is skipped.
Questions
What does "*/15 9-17 * * 1-5" mean?
Every 15th minute from 09:00 to 17:59, Monday to Friday. Paste it in to see the sentence and the next runs.
What are the five fields in a cron expression?
Minute, hour, day of month, month and day of week, in that order.
Does it support seconds?
No. It reads the standard 5-field cron format only.
Are my expressions uploaded?
No. They are read in your browser.