Cron Expression Parser
Parse cron expressions and convert them to human-readable descriptions. See exactly when your cron job will run with a list of upcoming execution times.
Enter a cron expression above to parse and analyze it.
Standard 5-field format: minute hour day month weekday
Cron Syntax Reference
Special Characters
*- Any value (wildcard),- List separator (e.g., 1,3,5)-- Range (e.g., 1-5)/- Step values (e.g., */5 for every 5)
Common Patterns
* * * * *Every minute*/5 * * * *Every 5 minutes*/15 * * * *Every 15 minutes*/30 * * * *Every 30 minutes0 * * * *Every hour at minute 00 0 * * *Every day at midnightFAQ
What does the Cron Parser do?
The Cron Parser takes a cron expression and provides a human-readable explanation of the schedule. It also calculates and displays the next several times the cron job would execute, making it easy to verify your schedule is correct.
What cron formats are supported?
The parser supports standard 5-field cron expressions (minute, hour, day of month, month, day of week) as well as extended 6-field expressions that include seconds. Both Unix cron and Quartz-style expressions are supported.
How accurate are the predicted run times?
The predicted run times are calculated based on the cron expression and your current timezone. They accurately reflect when the cron job would trigger, though actual execution may vary slightly depending on system load and the cron daemon implementation.
Can I parse non-standard cron expressions?
The parser handles most common cron syntax including wildcards (*), ranges (1-5), lists (1,3,5), step values (*/5), and combinations thereof. Some platform-specific extensions may not be fully supported.
What if my cron expression is invalid?
If you enter an invalid cron expression, the parser will display an error message indicating what's wrong. Common issues include wrong number of fields, out-of-range values, or invalid syntax.