Cron Parser
Parse cron expressions, humanize schedules, and project runs
About Cron Parser
How Cron Parser Works
Parses 5-field crontab schedules compliant with POSIX and Vixie cron specifications, translating syntax into plain English and projecting the next 5 upcoming execution timestamps. Calculations execute purely in JavaScript with zero server telemetry.
The Cron Parser parses standard 5-part crontab expressions into human-readable schedules and projects upcoming execution timestamps in local and UTC time. It validates ranges, step values, lists, and wildcards across minute, hour, day of month, month, and day of week. Developers use it to verify background job schedules, configure automated workflows, and avoid cron misconfigurations.
Frequently asked questions
What cron format does this tool support?+
Standard 5-part UNIX/Linux cron syntax: minute (0-59), hour (0-23), day-of-month (1-31), month (1-12), and day-of-week (0-7).
How many future runs are predicted?+
It calculates the next upcoming execution occurrences based on the current system clock.
Limitations
Non-standard 6-part or 7-part expressions with seconds or year fields should be converted to standard 5-field syntax.