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Cron expression builder
Create and inspect standard five-field cron expressions directly in your browser. Use presets or enter an expression, read a plain-language explanation and preview upcoming runs.
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Cron expression
Standard order: minute, hour, day of month, month, day of week. minute hour day-of-month month day-of-week
Enter a valid standard five-field cron expression.
Explanation
Next executions
Why use this tool?
Build and verify a standard five-field cron expression without uploading data. The tool explains common schedules and calculates upcoming runs in local time or UTC.
Smart processing
Generate, convert, or validate technical data with purpose-built controls.
Supported formats
Technical formats and syntaxes suited to each generator, converter, or validator.
Save time
Get a clean, ready-to-use result in seconds without installing software or configuring a complex workflow.
Guide
How to use this tool
- 1
Choose a preset
Select a common frequency or enter a cron expression directly.
- 2
Set the timezone
Choose local time or UTC to match the environment that will run the task.
- 3
Check upcoming dates
Analyze the expression and verify the next runs before using it.
Tips and best practices
- A standard cron expression contains five fields.
- Day-of-month and day-of-week usually use OR semantics when both are restricted.
- Always confirm the timezone used by the server that executes the task.
Frequently asked questions
Which cron format is supported?
The tool supports the standard five-field Unix format: minute, hour, day of month, month and day of week.
Can I use lists, ranges and steps?
Yes. Syntax such as 1,15, 1-5 and */10 is supported, together with English month and weekday names.
Are my expressions uploaded?
No. Parsing and upcoming execution calculations happen locally in your browser.
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