CRON Expression Parser

CRON Expression Parser tool

🔒 Runs in your browser · No uploads · Your data never leaves your device

How to use

1. 1

   Enter your cron expression

   Paste a 5-part cron expression into the input field, or choose one of the quick-pick examples.

2. 2

   Read the plain-English explanation

   The tool instantly explains what your cron schedule means in plain English.

3. 3

   Check the next run times

   See the next 5 dates and times when this cron job will execute.

Common use cases

• Understanding scheduled job timing — Paste a cron expression from a CI/CD config or server job to see exactly when it will next run.
• Debugging missed jobs — Verify a cron schedule is firing at the expected times by checking the next 5-10 run dates.
• Reviewing infrastructure configs — Decode cron expressions in Kubernetes CronJob manifests or GitHub Actions schedules during code review.

Examples

• Every weekday at 9 AM

  Cron for weekdays at 9:00 AM.

  Input

  0 9 * * 1-5

  Output

  Every weekday (Monday to Friday) at 9:00 AM

• Every 15 minutes

  Cron that runs every 15 minutes.

  Input

  */15 * * * *

  Output

  Every 15 minutes

• First of every month

  Cron for the 1st of each month at midnight.

  Input

  0 0 1 * *

  Output

  At midnight on the 1st of every month

Frequently asked questions

What is a cron expression?

A cron expression is a string of 5 fields that defines a schedule for automated tasks. The fields represent minute, hour, day of month, month, and day of week.

Does this support 6-part cron expressions?

This tool supports standard 5-part Unix cron expressions. Some systems (like AWS or Quartz) use 6-part expressions with a seconds field — those are not supported here.

Is my cron expression sent to a server?

No. All parsing and calculation happens in your browser. Your expressions never leave your device.

Why are my next run times showing in UTC?

Run times are shown in your local browser timezone by default.

Key concepts

Cron expression

A string of 5 (or 6) fields defining a schedule: minute, hour, day-of-month, month, and day-of-week.

Wildcard (*)

In cron, * means 'every valid value' for that field — e.g. * in the hour field means every hour.

Cron job

A scheduled task configured to run automatically at defined intervals on Unix-like systems.

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