What is a cron expression parser?
A cron expression parser reads a cron schedule and explains when the scheduled task will run.
Date & Time
Cron Expression Parser
Parse cron expressions directly in your browser. Explain each cron field, validate schedules, and preview upcoming run times for recurring jobs.
Tool
Cron Expression Parser
Parse cron expressions directly in your browser. Explain each cron field, validate schedules, and preview upcoming run times for recurring jobs.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free cron expression parser to understand what a cron schedule means. Enter a cron expression and see a plain-language explanation, field breakdown, validation result, and upcoming run times.
Conversion Formula
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Cron parsing reads each schedule field, such as minute, hour, day of month, month, and day of week. The next run times are calculated by matching future dates and times against those field rules.
Examples
- 0 9 * * * = every day at 09:00
- */15 * * * * = every 15 minutes
- 30 8 * * 1 = every Monday at 08:30
Frequently Asked Questions
Can it validate cron expressions?
Yes. The parser can check whether the expression has valid fields, ranges, steps, and allowed values.
Can it show the next run times?
Yes. The tool can calculate upcoming run times so you can test whether the schedule matches your expectation.
Does it support every cron variant?
Cron syntax differs between systems. The tool should clearly state which format it uses, such as standard five-field cron.