Frequently asked questions
- Is my data uploaded to a server?
- No. Every operation runs inside your browser using JavaScript. Nothing you paste or type is sent to our servers, stored or logged. You can disconnect from the network after the page loads and the tool keeps working.
- Which cron format does this use?
- The standard five-field crontab form: minute, hour, day of month, month, day of week. Quartz and some schedulers use six or seven fields with seconds first and years last; reading one of those as a five-field expression would shift every field and describe a completely different schedule, so this refuses rather than guesses.
- What does */15 mean?
- Every fifteenth unit, starting from the first. In the minute field it means at 0, 15, 30 and 45 minutes past the hour.
- What happens if I set both day of month and day of week?
- In most cron implementations the job runs when either matches, not when both do - which surprises nearly everyone. If you need a specific weekday, leave day of month as *.
Related tools
Stuck on an error?
Every common JSON parse error is explained separately, with the cause and the fix: common JSON errors.
How your data is handled
Everything happens on your device. There is no upload, no storage and no logging, and only your interface preferences - theme, indentation, font size and word wrap - are kept between visits. Closing the tab clears the document.