Cron Expression Parser

A standard cron expression has five fields: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6, Sunday is 0). For example, '30 9 * * 1-5' means at 9:30 AM every Monday through Friday. The asterisk means every value, commas separate lists, hyphens define ranges, and slashes set intervals. Paste any cron expression into DevBolt's Cron Parser and it translates it into plain English with the next scheduled run times. The parser handles both 5-field Unix cron and 6-field Quartz/Spring cron with a seconds field.

Standard Unix cron uses five fields: minute, hour, day of month, month, and day of week. Some systems add a sixth field for seconds at the beginning: second, minute, hour, day of month, month, day of week. The 6-field format is used by Java-based schedulers like Quartz and Spring. DevBolt's parser auto-detects both formats. If you are using Linux crontab, GitHub Actions, or AWS CloudWatch, use the 5-field format. If working with Quartz Scheduler or Spring Task Scheduling, check your platform's documentation since some use 5-field and others use 6-field with seconds.

Paste your cron expression into DevBolt's Cron Parser and it displays the next scheduled execution times along with a plain-English description. This lets you verify the schedule before deploying. Common mistakes caught by testing include off-by-one errors in hour fields, confusing day-of-week numbering (0 vs 1 for Monday varies by system), and misunderstanding step values (*/5 starts from 0, not from the current time). Always test edge cases like month-end dates, leap years, and timezone boundaries. The parser shows multiple upcoming run times so you can verify the pattern matches your expectations.