About Cron Job Tester

Validates standard 5-field cron expressions and shows the next 10 execution times. The parser handles wildcards (*), ranges (1–5), steps (*/15), and comma-separated lists (1,15,30). Includes eight common presets from every-minute to weekdays-at-9-AM.

• Parses standard 5-field cron syntax: minute (0–59), hour (0–23), day of month (1–31), month (1–12), day of week (0–7)
• Supports wildcards (*), ranges (1–5), step values (*/15), and comma-separated lists (6,18)
• Validates each field against its legal range and reports specific error messages
• Calculates next 10 execution times by iterating minute-by-minute from the current time
• Human-readable description generated from the expression fields
• Eight presets: every minute, every hour, daily midnight, weekly Sunday, monthly 1st, weekdays at 9 AM, every 15 min, twice daily

Frequently Asked Questions

Does this support 6-field or 7-field cron expressions?

No. It only supports the standard 5-field format (minute hour day month weekday). Seconds fields (used by some schedulers like Quartz) and year fields are not supported.

Why are my next execution times skipping weekends?

Your day-of-week field is filtering them out. Values 1–5 mean Monday through Friday. Use * for every day or 0,6 for weekends only. Note: both 0 and 7 represent Sunday.