Cron Expression Validator — Schedule Checker
Validate cron expressions, get a plain-English explanation of what they mean, and see the next scheduled run times — all in your browser.
How to Use Cron Expression Validator — Schedule Checker
How to Use the Cron Expression Validator
Step 1: Enter a Cron Expression
Type or paste a standard 5-field cron expression into the input:
minute hour day-of-month month day-of-week
For example:
* * * * *— every minute0 9 * * MON-FRI— 9:00 AM on weekdays*/15 * * * *— every 15 minutes@daily— once a day at midnight
Step 2: Read the Plain-English Explanation
The validator immediately shows what your expression means in plain English — no cron knowledge required.
Step 3: Review the Field Breakdown
Each of the 5 fields is explained individually:
| Field | Range | Accepted Values |
|---|---|---|
| Minute | 0–59 | Numbers, *, */n, ranges, lists |
| Hour | 0–23 | Numbers, *, */n, ranges, lists |
| Day of month | 1–31 | Numbers, *, */n, ranges, lists |
| Month | 1–12 | Numbers or JAN–DEC, *, ranges |
| Day of week | 0–7 | Numbers (0=Sun, 7=Sun) or SUN–SAT |
Step 4: See the Next Scheduled Runs
For valid expressions, the tool shows the next 5 upcoming execution times computed from now.
Special Aliases
The tool supports the following shorthand aliases:
| Alias | Equivalent |
|---|---|
| @yearly | 0 0 1 1 * |
| @annually | 0 0 1 1 * |
| @monthly | 0 0 1 * * |
| @weekly | 0 0 * * 0 |
| @daily | 0 0 * * * |
| @midnight | 0 0 * * * |
| @hourly | 0 * * * * |
Tips
- Click an example pill to load a common expression instantly
- Named months and weekdays are case-insensitive (e.g.,
Mon,MON,mon) 7is accepted as an alias for Sunday in the day-of-week field- All validation happens locally — your expressions are never sent anywhere
Frequently Asked Questions
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