Cron format converter

Paste a schedule in one format and get the equivalent in the others — standard crontab, Quartz, and systemd OnCalendar — with a plain-English description of when it runs. Nothing is uploaded.

Input format

Your schedule min hour day-of-month month day-of-week · e.g. 0 9 * * 1-5

Quick examples

When it runs

Standard crontab (5-field)

Quartz (6/7-field)

systemd OnCalendar

Everything runs in your browser. No upload, no sign-up.

How it works

STEP 1

Pick the input format

Choose whether you are pasting a standard crontab line, a Quartz expression, or a systemd OnCalendar string — then drop it in.

STEP 2

Convert

The schedule is parsed in your browser and re-expressed in all three formats, with a plain-English sentence so you can sanity-check it.

STEP 3

Copy the one you need

Copy the crontab, Quartz or OnCalendar line with one click. Notes appear when a detail does not map cleanly between formats.