Cron Explainer
Turn crontab expressions into plain English and next run times
Use Cron Explainer free in your browser. Free online cron expression explainer. Paste a crontab schedule, read it in plain English, see field breakdowns and the next run times in your timezone — runs in your browser, no signup.
What you can do with Cron Explainer
Cron Explainer on OnliKit is a free browser tool for everyday work — turn crontab expressions into plain english and next run times. Use it when you need a quick result without installing software or creating an account.
- Explain 5-, 6-, and 7-field cron expressions plus @daily-style nicknames.
- Show a clear English sentence for the schedule.
- Break down minute, hour, day, month, and weekday fields.
- List the next ten fire times in a timezone you choose.
- Load common presets such as every 5 minutes or weekdays at 9am.
- Copy the English description or upcoming runs for docs and tickets.
Why use Cron Explainer?
Use Cron Explainer when a crontab line is hard to read at a glance. Paste the expression, confirm the English meaning, then check the next fire times before you deploy a job.
Field breakdowns help catch off-by-one mistakes in day-of-month versus day-of-week. Timezone selection keeps “9am” aligned with the region your workers actually run in.
Parsing stays in your browser. No account is required and schedule strings are not uploaded to OnliKit.
How to use Cron Explainer
- 01Paste a cron expression or pick a preset.
- 02Read the plain-English description and field breakdown.
- 03Choose a timezone for upcoming runs.
- 04Copy the explanation or next-run list when ready.
Frequently asked questions
What does a cron expression mean?
A cron expression is a schedule made of minute, hour, day, month, and weekday fields. This tool turns that pattern into plain English and lists upcoming run times.
Are Quartz or 6-field expressions supported?
Yes. Standard 5-field crontab, optional seconds, and common nicknames like @daily are supported where the parser allows.
Does explaining cron leave my computer?
No. Explanation and next-run calculation run in your browser. Nothing is uploaded to OnliKit servers.
Can I see the next run times?
Yes. The tool lists the next ten fire times in the timezone you select so you can verify the schedule before deploying.
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