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Hazuu Tools

Cron Expression Parser

Parse cron expressions into human-readable schedules with field breakdowns and next run times.

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Enter a cron expression and click Parse to see the schedule.
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About Cron Parser

Cron is a time-based job scheduler used in Unix-like operating systems, cloud platforms, and CI/CD pipelines. A cron expression is a compact string of five fields — minute, hour, day of month, month, and day of week — that defines exactly when a scheduled task should run. While incredibly powerful, these expressions can be difficult to read and write correctly.

Our Cron Parser instantly translates any standard five-field cron expression into a clear, human-readable schedule description. It also calculates the next upcoming run times based on your current local time and provides a detailed breakdown of each field, so you can verify your schedules with confidence before deploying them to production.

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How to Use

01

Enter Expression

Type or paste a five-field cron expression into the input field, or choose one from the Presets menu.

02

Parse

Click the "Parse" button (or press Enter) to analyze the expression and generate the schedule.

03

Review Results

Read the human-readable description, inspect the field breakdown table, and check the next 10 scheduled run times.

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Frequently Asked Questions

What is a Cron Parser? expand_more
A cron parser is a tool that takes a cron expression — a five-field string used to define recurring schedules — and translates it into a human-readable description. It helps developers, system administrators, and DevOps engineers understand exactly when their scheduled tasks will run without having to mentally decode the syntax.
What cron syntax is supported? expand_more
This tool supports the standard five-field cron format: 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). It handles wildcards (*), step values (*/n), ranges (n-m), comma-separated lists (n,m,o), and range-with-step (n-m/s).
Is my data processed securely? expand_more
Yes. All parsing and schedule calculations happen entirely in your browser using JavaScript. No data is ever sent to a server, ensuring your cron expressions and schedule details remain completely private.
Why are the next run times different from what I expect? expand_more
The next run times are calculated based on your local system clock and timezone. If you are comparing against a server in a different timezone (e.g., UTC), the times may differ. Make sure to account for timezone differences when verifying schedules.