Cron Expression Parser

About this tool

Paste a standard 5-field cron expression and get a plain-English explanation of its schedule.

Example

Input: 0 9 * * 1-5

Output: Runs at hour 9, minute 0 on weekday(1-5).

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Paste a standard 5-field cron expression into the input box.
2. Check that the fields are in the usual order: minute, hour, day of month, month, day of week.
3. Read the plain-English schedule explanation the tool generates instantly.
4. If the result is not what you expected, adjust the expression and parse it again.

Step by step, what happens

1. The tool reads the cron string as five separate fields, not as a sentence or a date format.
2. It interprets each field by its cron meaning, such as which minute, hour, day, month, or weekday is allowed.
3. It combines those field rules into one human-readable description of when the job runs.
4. If any part is unclear or invalid, you can revise the expression and see the updated explanation right away.

Worked example

Suppose you want to understand a job that runs every weekday at 9:30 in the morning.

Input: 30 9 * * 1-5

1. Paste 30 9 * * 1-5 into the parser.
2. The tool reads it as minute 30, hour 9, any day of the month, any month, and weekdays Monday through Friday.
3. It converts those rules into a clear English schedule description.

Tips and common mistakes

• Make sure you are using a standard 5-field cron expression, because this tool is built for that format.
• Remember that the field order matters. A swapped hour and minute can describe a completely different schedule.
• Use wildcards carefully. A star means any valid value for that field, not a blank or missing value.
• If your cron uses extra fields or special syntax from another scheduler, it may not parse the way you expect here.

Frequently asked questions