Cron expression explainer

What this tool does

cronstrue explains the expression. ConvertPass does not compute the next fire time against a specific timezone unless your scheduler documents one separately.

How to use it

1. Paste an expression such as 0 9 * * 1-5.
2. Read the description.
3. Confirm the timezone in your scheduler, not here.

Privacy

This tool processes files and text locally in your browser. Your content is not uploaded or stored by this site.

ConvertPass does not include your input in analytics, URLs, or error reports. Encoding: ASCII. Limit: 200 characters (200 B).

Limitations

• Quartz year fields and some AWS cron variants are not supported.
• The description is not a guarantee of scheduler behaviour; implementations disagree on day-of-week numbering.

Example

0 9 * * 1-5

At 09:00 AM, Monday through Friday

Troubleshooting

Day-of-week looks wrong

Some systems treat 0 as Sunday and others as Monday. Read your scheduler's docs. The explainer follows a common UNIX convention.

FAQ

Does this run the job?

No. It only explains the expression.

Is 7 a valid day-of-week?

Some crons accept 7 as Sunday. If the explainer rejects it, rewrite as 0 or SUN depending on your scheduler.

Can I explain Kubernetes CronJobs?

The schedule field is standard cron. StartingDeadlineSeconds and timeZone are separate and not parsed here.

Why no next-run calendar?

Next-run depends on timezone and on how the implementation handles DST. A wrong calendar would be worse than none.