Free tools

Two small tools for people who run scheduled jobs. No account, no signup, and nothing you type is sent to this server — both run entirely in your browser.

• Crontab expression explainerPaste a cron expression and read it in plain English, with the next ten run times in any timezone.
• Grace period calculatorWork out the period and grace to give a monitor, from how long the job takes and how late its scheduler starts it.

If what you actually want is to be told when one of those jobs stops running, that is what Vivere does — free for ten monitors.