Valid Expression
Runs every 15 minutes, of every hour
执行计划：在 每小时每隔 15 分钟 执行
Upcoming Execution Schedule (Next 5 Runs)
12026-11-08 05:45:00 (Sunday)
in 4 minutes22026-11-08 06:00:00 (Sunday)
in 19 minutes32026-11-08 06:15:00 (Sunday)
in 34 minutes42026-11-08 06:30:00 (Sunday)
in 49 minutes52026-11-08 06:45:00 (Sunday)
in 1 hr 4 minLinux Crontab Command Helper
crontab -e*/15 * * * * /usr/local/bin/sync-job.sh
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How to generate and simulate Cron expressions
- 1Select a preset interval (e.g. Every 15 mins, Daily at midnight) or click individual tabs to configure Minutes, Hours, Days, Months, and Weekdays.
- 2Read the real-time natural language explanation to verify your schedule matches your business requirements.
- 3Check the Next 5 Runs simulation table with countdown timers to preview exact execution timestamps.
- 4Click 'Copy Cron' or 'Copy Crontab Command' to deploy into crontab -e, AWS CloudWatch, or GitHub Actions.
Zero-Latency Client-Side Calculation
Schedule simulations and syntax parsing run entirely within your local browser sandbox with zero telemetry or server calls.
Architecture & Privacy
- 100% Client-Side Engine: Hardware-accelerated local parsing with zero server roundtrips or private schedule logging.
- Dual Human Language Translation: Instant semantic translation into clear English and Chinese sentences.
- Next 5 Execution Simulator: Pre-calculates exact upcoming execution timestamps and relative countdowns.
- Standard 5-Field POSIX & Quartz Syntax: Compatible with Linux crontab, Kubernetes CronJobs, Celery, and Vercel Cron.
Frequently Asked Questions
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