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Cron Expression Builder

Build cron schedules visually and see a plain English description with next run times.

* * * * *

Every minute

Minute

Hour

Day of Month

Month

Day of Week

Common Presets

* * * * *

Every minute

0 * * * *

Every hour (on the hour)

0 0 * * *

Daily at midnight

0 9 * * 1-5

Weekdays at 9:00 AM

0 0 * * 0

Weekly on Sunday

0 0 1 * *

Monthly (1st at midnight)

*/15 * * * *

Every 15 minutes

0 0 1 1 *

Yearly (Jan 1 at midnight)

Next 5 Run Times

About Cron Expression Builder

Working with code and configuration files often means switching between formats, encoding strings, or validating syntax. Cron Expression Builder eliminates the need for desktop software or command-line utilities by giving you a clean, instant interface right in your browser. Paste your input, get your result — no accounts, no installations, no data leaving your machine.

How to Use

Enter or paste your input Type or paste your data into the input area. You can also use keyboard shortcuts (Ctrl+V) for quick pasting.

Configure options Adjust any settings or options above the input area to customize the output format and behavior.

Process your data Click the primary action button to process your input. The result appears instantly — no server round-trips.

Review the output Check the output area for your processed result. Any errors or warnings will be displayed clearly.

Copy or download Use the Copy button to copy the result to your clipboard, or download it as a file if that option is available.

🔒 Privacy note: All processing happens locally in your browser. Your data is never sent to any server.

Why Use Cron Expression Builder?

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Instant Results, Zero Setup No need to install CLI tools, configure environments, or write scripts. Cron Expression Builder gives you the result instantly in your browser — paste, click, done.

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Your Code Stays Private All processing runs locally using JavaScript. Your source code, API keys, tokens, and configuration data never leave your browser — not even temporarily.

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Part of Your Dev Workflow Bookmark this tool alongside your IDE and terminal. When you need a quick format, encode, or validation, it's one tab away — faster than installing yet another npm package.

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Use It Anywhere Works on any device with a modern browser — laptop, tablet, or phone. Perfect for quick fixes when you're away from your development machine.

Frequently Asked Questions

A cron expression is a string with 5 fields (minute, hour, day-of-month, month, day-of-week) that specifies when a scheduled task should run. The * wildcard means "every", numbers specify exact values, and / specifies intervals.

The / character means "every N units". */5 in the minute field means "every 5 minutes" (0, 5, 10, 15, 20...). */2 in the hour field means "every 2 hours". It always starts from the beginning of the range.

Hyphens define ranges: 1-5 in day-of-week means Monday through Friday. You can combine with commas for lists: 1,3,5 means Monday, Wednesday, Friday. Combine both: 1-5,7 means weekdays plus Sunday.