Cron Expression Builder
Build cron expressions visually for Unix, Quartz, AWS EventBridge, and GitHub Actions. Preview upcoming run times instantly in your browser.
🔒 Zero network requests. Schedules are generated in your browser.
Generated expression
0 9 * * * Preview uses your current browser timezone.
Next runs
- Apr 8, 2026, 9:00 AM
- Apr 9, 2026, 9:00 AM
- Apr 10, 2026, 9:00 AM
- Apr 11, 2026, 9:00 AM
- Apr 12, 2026, 9:00 AM
Frequently Asked Questions
What formats does this support?
This builder outputs Unix 5-field cron plus Quartz, AWS EventBridge, and GitHub Actions variants for the same schedule.
Are preview times generated locally?
Yes. TeaFun calculates the upcoming run times in your browser using the options you selected.
Can I use this for GitHub Actions workflows?
Yes. Switch the format to GitHub Actions and copy the generated expression into your workflow schedule.