Cron Format Converter — free online tool
You wrote a schedule for one system, and now another tool wants it in a different shape. Maybe you have a crontab line but your app needs Quartz, or a systemd timer wants its own style. Copying it by hand is fiddly and easy to get wrong. We added a free tool that handles it — Cron Format Converter — right in your browser.
What it does
You paste a schedule in one format and it gives you the same schedule in all three: standard 5-field crontab, Quartz (the 6 or 7-field style with seconds and an optional year), and systemd OnCalendar. It also writes out, in plain English, when the schedule actually runs, so you can double-check it. There are quick examples to start from, and a note pops up if some detail doesn't carry over cleanly between formats.
Nothing leaves your device
The whole thing runs in your browser. Your schedule is read and converted right on your screen — nothing is uploaded, nothing is saved, and there's no sign-up.
How to use it
- Open Cron Format Converter, pick which format you're pasting, and drop your schedule in.
- Press Convert and read the plain-English line to make sure it matches what you meant.
- Copy the crontab, Quartz or OnCalendar version you need with one click.
It's free with no limit. There are more small tools on the Apps page.