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Cron Expression Explainer

Explain standard five-field numeric Unix cron expressions and calculate five future runs.

ImportantSupports numeric five-field Unix cron syntax with lists, ranges, wildcards, and steps; Quartz extensions are not supported.

Timezone

Cron expression

Explanation

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Your data stays private. All processing happens locally in your browser. Nothing is uploaded to our servers.

Built for real work

Why use Cron Expression Explainer?

Explain standard five-field numeric Unix cron expressions and calculate five future runs. Processing stays in the current browser tab so the source remains private.

Five-field Unix cron validation

Readable field summary

Five upcoming occurrences

How to use it

Enter a five-field cron expression.
Choose local time or UTC.
Select Explain Cron.

Common use cases

Review deployment schedules

Debug numeric cron expressions

Example

*/15 9-17 * * 1-5

Frequently asked questions

What does Cron Expression Explainer do?

Explain standard five-field numeric Unix cron expressions and calculate five future runs. Processing stays in the current browser tab so the source remains private.

Is my cron expression uploaded?

No. Your cron expression is processed locally by browser APIs and is never sent to DevTools Hub.

Can I use Cron Expression Explainer without an account?

Yes. Cron Expression Explainer is free, works without registration, and supports modern desktop and mobile browsers.

Cron Expression Explainer

Why use Cron Expression Explainer?

How to use it

Common use cases

Review deployment schedules

Debug numeric cron expressions

Example

Frequently asked questions

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