Cron Parser
Next steps
Enter a 5-field cron (minute hour day month weekday)
Common presets
Cron Parser - Decode Cron Expressions Online
Free cron parser with field breakdown, human summary, and next run times — like crontab.guru.
Enter a cron expression for field breakdown, summary, and upcoming runs. Use presets to try common schedules.
A cryptic string like 0 9 * * 1-5 is hard to read at a glance. This tool splits each field — minute, hour, day of month, month, and day of week — and explains wildcards, ranges, lists, and step values.
WaiHub's Cron Parser runs entirely in your browser. Paste any cron expression and get an instant field-by-field summary without sending data to a server.
- Decode 5-field cron expressions
- Human-readable field breakdown
- Explain *, ranges, lists, steps
- Instant validation feedback
- Useful for job debugging
- Privacy-first browser processing
Features
- Parse minute field
- Parse hour field
- Parse day of month
- Parse month field
- Parse day of week
- Human-readable summary
- Wildcard and step support
- Range and list support
- Invalid field detection
- Runs locally in browser
How To Use
Enter cron expression
Type a standard 5-field cron like 0 9 * * 1-5.
Review field breakdown
Each field is listed with its raw value and plain-language description.
Read the summary
The summary line combines all fields into a readable schedule description.
Fix invalid input
If the expression does not have exactly 5 fields, an error message appears.
Examples
Weekday mornings
Cron
0 9 * * 1-5Summary
At 9:00 AM, Monday through FridayEvery 15 minutes
Cron
*/15 * * * *Summary
Every 15 minutesFAQ
- Is this cron parser free?
- Yes. Completely free with no signup.
- 6-field cron with seconds?
- Only standard 5-field format is supported (no seconds field).
- Next run time?
- This version provides field parsing and summary, not next execution time.
- Is my data uploaded?
- No. Parsing runs entirely in your browser.
- Can I use it commercially?
- Yes. Free for personal and commercial use.