--- title: "Cron Expression Generator" description: "Build standard 5-field cron expressions (minute hour day-of-month month day-of-week). See a plain English description and the next run times." url: https://findutils.com/developers/cron-expression-generator/ category: developers --- # Cron Expression Generator Build standard 5-field cron expressions (minute hour day-of-month month day-of-week). See a plain English description and the next run times. **Use this tool:** [Cron Expression Generator](https://findutils.com/developers/cron-expression-generator/) ## Programmatic access - REST id `cron-describe`: POST https://api.findutils.com/api/tools/cron-describe/execute (reference: https://findutils.com/api/cron-describe/) - MCP tool `cron_describe` on https://mcp.findutils.com (reference: https://findutils.com/mcp/cron-describe/) ## Why use our Cron Expression Generator? Easily create cron expressions for scheduling automated tasks. Use our visual builder with quick presets or customize each field. See the next 5 scheduled runs instantly. Perfect for setting up cron jobs on Linux servers, scheduling tasks in CI/CD pipelines, or configuring scheduled functions in cloud platforms. ## Tips for Writing Cron Expressions - Always test your cron expression by checking the next 5 runs before deploying to production. - Use comments in your crontab file to document what each job does and when it was added. - Avoid scheduling heavy tasks at exactly midnight or the top of the hour, as many other jobs may run at those times. Offset by a few minutes. - Remember that day-of-month and day-of-week fields are OR-joined in standard cron, not AND-joined. Setting both can produce unexpected results. - For critical jobs, add error handling and logging so you know immediately if a scheduled task fails. ## Frequently Asked Questions ### What is a cron expression? A cron expression is a string of 5 fields representing minute, hour, day of month, month, and day of week. It defines when a scheduled task should run. ### What does the asterisk (*) mean? An asterisk means 'every' or 'any value'. For example, * in the hour field means the task runs every hour. ### How do I run a task every 5 minutes? Use */5 in the minute field: */5 * * * *. The /5 syntax means 'every 5 units'. ### What's the difference between day fields? Day of month (1-31) specifies the calendar date, while day of week (0-6) specifies which weekday (0=Sunday). ### Are cron expressions timezone-aware? Cron expressions use the server's timezone by default. Check your server or platform documentation for timezone configuration. ### Can I use this generator for GitHub Actions schedules? Yes. GitHub Actions uses standard 5-field cron syntax in the schedule trigger. Build your expression here, verify the next runs, then paste it into your workflow YAML file under the cron key. ### What is the difference between */5 and 0/5 in the minute field? In standard cron, */5 and 0/5 produce the same result: both run at minutes 0, 5, 10, 15, and so on. The */5 form is more commonly used. Some extended cron implementations like Quartz treat them differently. ### Does this tool support 6-field or 7-field cron expressions? This generator produces standard 5-field cron expressions (minute, hour, day of month, month, day of week). Some systems like Quartz or Spring use 6 or 7 fields with a seconds column. You can prepend a seconds field manually if needed. ### How do I schedule a task to run only on weekdays? Set the day-of-week field to 1-5, which represents Monday through Friday. For example, 0 9 * * 1-5 runs at 9 AM every weekday. You can also use the Weekdays 9 AM preset in this tool. ### Is it safe to use this cron generator online? Tool input stays in the browser. Analytics and ads may load on the page. There is no signup and no usage limit. ## Related Tools - [Unix Timestamp](https://findutils.com/developers/unix-timestamp/) - [Regex Tester](https://findutils.com/developers/regex-tester/) - [JSON Formatter](https://findutils.com/developers/json-formatter/) - [cURL to Code](https://findutils.com/developers/curl-to-code/) - [JSON Schema Validator](https://findutils.com/developers/json-schema-validator/) - [SQL Formatter](https://findutils.com/developers/sql-formatter/) - [Base64 Encoder](https://findutils.com/developers/base64-encoder/) - [YAML Validator](https://findutils.com/developers/yaml-validator/)