ToolNova

💻 Cron Expression Explainer — Five-Field Schedules

Paste a minute-hour-day-month-weekday expression. The explainer names each field and estimates the next few matching times in your local timezone.

Developer Free · no sign-up Added 2026-10-06
Input
Result
Next runs (local time) 

  




  Fields
  



        

      

    

    

      
      Private by design. This tool runs entirely in your browser — nothing you enter or add is uploaded to any server.
    

  


  

    
How it works

    
    
      
  1. Enter five space-separated fields: minute, hour, day of month, month, day of week.
    2. 
      
  2. Use * for any, commas for lists, hyphens for ranges and / for steps, such as */15 or 1-5.
    3. 
      
  3. Press Explain to see a field-by-field reading and the next matching local times.
    4. 
    


    
Examples

    
    
      
  • 0 9 * * 1-5 means 09:00 on Monday through Friday.
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  • */15 * * * * means every 15 minutes.
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  • 0 0 1 * * means midnight on the first day of each month.
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Frequently asked questions

    

  

    Which cron dialect does this cover?
    
Standard five-field cron used by Vixie cron and many schedulers. It does not parse seconds, years, or names such as JAN or MON.

  

  

    How are day-of-month and day-of-week combined?
    
If both fields are restricted, a time matches when either field matches, which is the usual cron OR rule. If either field is *, only the other field is applied.

  

  

    Is the expression sent to a server?
    
No. Parsing and the next-run search happen in your browser. Results use your device timezone.

  



  


  

    

      
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