Cron Expression Parser
Parses a crontab expression and explains its schedule in plain English.
Input
Five fields: minute, hour, day-of-month, month, day-of-week.
Output
Runs at minute 0, hour 9, day-of-week 1.
Runs entirely in your browser. Your input is not uploaded or stored.
How to use this calculator
- Enter a 5-field cron expression (minute hour day-of-month month day-of-week).
- Read the plain-English schedule.
How it works
Parses each field — *, */n, lists and ranges — into a readable description.
Worked example
0 9 * * 1. Runs at minute 0, hour 9, day-of-week 1 (Monday mornings).
Tips
- Runs entirely in your browser. Your input is not uploaded or stored.
Frequently asked questions
Which cron format?
Standard 5-field cron (no seconds field).
Privacy?
Runs entirely in your browser. Your input is not uploaded or stored.
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Cite this tool
Zerdly. (2026). Cron Expression Parser. Retrieved from https://www.zerdly.com/tools/cron-expression-parser/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.