What is a cron expression?

A cron expression is a string of 5 fields (minute, hour, day of month, month, day of week) used to schedule recurring tasks in Linux crontab, Kubernetes CronJobs, and CI/CD pipelines.

How do I use the cron generator?

Select your values or use a preset, and the cron expression is generated instantly along with a human-readable explanation.

Is this cron generator free?

Yes, VelnoxLabs Cron Expression Generator is 100% free with no sign-up required.

Cron Expression Generator

Build cron expressions visually with human-readable explanations.

Minute

Hour

Day (Month)

Month

Weekday

Cron Expression:

0 9 * * *

📖 Human-Readable:

Runs At 09:00 AM

Cron Format Reference

Minute

Range: 0-59

* , - /

Hour

Range: 0-23

* , - /

Day (Month)

Range: 1-31

* , - /

Month

Range: 1-12

* , - /

Weekday

Range: 0-6 (Sun-Sat)

* , - /

About Cron Expression Generator

The Cron Expression Generator & Parser is an essential DevOps and backend engineering utility that translates between human-readable scheduling rules and standard POSIX cron syntax. Supporting standard 5-field crontabs (minute, hour, day of month, month, day of week) and 6-field quartz syntax, it explains schedules in plain English and calculates upcoming trigger times.

Key features

Visual Schedule Builder: Build complex recurring schedules using intuitive dropdowns and selectors without memorizing syntax
Human-Readable Schedule Translation: Instantly translates cryptic cron strings (like "*/15 0-6 * * 1-5") into clear English descriptions
Upcoming Execution Timestamps: Calculates and previews the next scheduled run times to prevent scheduling mistakes
Universal Platform Compatibility: Generates expressions compatible with Linux crontab, GitHub Actions, AWS EventBridge, and Kubernetes CronJobs

How to use

Configure Schedule Parameters: Choose recurrence intervals for minutes, hours, days of the month, months, and days of the week.
Inspect Decoded Syntax: Review the generated cron expression alongside its natural-language translation and upcoming execution preview.
Copy Cron Expression: Click "Copy" to paste the validated cron string directly into your crontab, CI/CD pipeline, or infrastructure code.

FAQ

What do the 5 fields in a standard cron expression represent?

From left to right: Minute (0-59), Hour (0-23), Day of Month (1-31), Month (1-12 or JAN-DEC), and Day of Week (0-6 or SUN-SAT, where 0 and 7 are Sunday).

What does the asterisk (*) and slash (/) mean in cron?

An asterisk (*) means "every value" (e.g., every minute). A slash (/) specifies step increments (e.g., */5 in the minute field means "every 5 minutes").

Can this expression be used in GitHub Actions?

Yes! GitHub Actions workflow triggers use standard POSIX cron expressions on the UTC timezone schedule.

How do I specify run times only on weekdays?

Set the Day of Week field to "1-5" (Monday through Friday). For example, "0 9 * * 1-5" runs at 9:00 AM every Monday through Friday.

Got Feedback or Feature Requests?

Help us enhance VelnoxLabs developer utility standards. Share your feedback below!

About Cron Expression Generator

Key features

Visual Schedule Builder: Build complex recurring schedules using intuitive dropdowns and selectors without memorizing syntax

Human-Readable Schedule Translation: Instantly translates cryptic cron strings (like "*/15 0-6 * * 1-5") into clear English descriptions

Upcoming Execution Timestamps: Calculates and previews the next scheduled run times to prevent scheduling mistakes

Universal Platform Compatibility: Generates expressions compatible with Linux crontab, GitHub Actions, AWS EventBridge, and Kubernetes CronJobs