⏰Cron Expression Parser (Next Run)
Enter a cron expression to get a human-readable description and the next N execution times. Supports 5-field and 6-field (with seconds). Useful for writing Linux cron jobs, validating GitHub Actions schedules, AWS EventBridge, and Vercel Cron settings.
How to use
- 1Enter a cron expression (e.g., '0 9 * * 1').
- 2The description and next 10 run times are displayed.
FAQ
Is it shown in Korean time?+
Uses your browser's timezone (typically KST). Server cron is usually UTC, so there may be a 9-hour difference — be careful.
5-field vs 6-field?+
5-field: min hour day month weekday. 6-field: sec min hour day month weekday. AWS uses 6 (and year), standard Linux uses 5.
What does '0 9 * * 1' mean?+
Run every Monday at 9:00 AM. 0 (minute) 9 (hour) * (every day) * (every month) 1 (Monday).
Special characters like L or W?+
L (Last day) and W (Weekday) are Quartz/AWS extensions — not supported in standard Linux cron.
GitHub Actions cron doesn't run on time?+
GitHub Actions schedule isn't guaranteed exact and can lag by ±5–15 minutes. For exact timing, use a different service.
Can I run something once with cron?+
Cron is for recurring tasks. For one-time runs, use the `at` command or a separate scheduler.