Cron Builder & Analyzer
Build cron expressions visually by choosing the minute, hour, day, month and weekday. Or analyze an existing expression to see when it runs in plain language and the next 5 real dates.
Settings
*/5 * * * *Format: min hora día-del-mes mes día-semana [segundo]. Allowed range 0-59 / 0-23 / 1-31 / 1-12 / 0-7.
Next runs
Runs: en el minuto cada 5 (de *), de cada hora, todos los días
The field list is interpreted as: min="*/5", hour="*", dom="*", mon="*", dow="*".
Copy the generated expression and paste it into your crontab.
How to use: Cron builder
- 1Use the visual builder to choose minutes, hours, days and months.
- 2Or paste a cron expression to analyze it.
- 3Read the plain-language description and copy the expression.
What is it for?
- Write crons without memorizing the syntax.
- Understand what a legacy cron does.
- Document scheduled jobs in plain language.
From plain language to cron
Phrases to expressions
Describe the frequency ("every day at 9", "Mondays at 8:30") and get a five-field expression ready to copy into crontab, GitHub Actions or a scheduler.
Differences between platforms
Quartz and Spring use six or seven fields including seconds; AWS EventBridge has its own syntax. Adapt the expression to the system where you will deploy it.
Check the next runs
Always review the next calculated dates and the server time zone before trusting the schedule.
Related tools
Frequently asked questions
Can seconds be added?+
Yes. You can enable a sixth field (seconds) in the visual builder for 6-field expressions like */30 * * * * *.