Does it support 5 or 6 fields (with seconds)?

Standard 5 fields (min hour dom mon dow). Six-field cron with seconds and macros like @yearly are not supported yet.

How are day and weekday combined?

Following crontab convention: when both day-of-month and day-of-week are set, a match on either triggers.

Are my files or data uploaded?

No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.

Do I need to sign up or pay?

No. The site is completely free, needs no account and has no usage limits.

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⏰Cron Expression Parser - Explain & Predict Next Runs Online

Parse a standard 5-field cron expression (minute, hour, day-of-month, month, day-of-week), break down what each field means and predict the next 5 actual run times in your local time zone. Supports *, lists, ranges and steps (like */15). Great for checking crontab, CI schedules and job configs.

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How to use Cron Expression

1Enter a cron expression or pick an example
2See the parsed values of each field
3Check the "Next 5 runs" to confirm it matches

FAQ

Does it support 5 or 6 fields (with seconds)?: Standard 5 fields (min hour dom mon dow). Six-field cron with seconds and macros like @yearly are not supported yet.
How are day and weekday combined?: Following crontab convention: when both day-of-month and day-of-week are set, a match on either triggers.
Are my files or data uploaded?: No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.
Do I need to sign up or pay?: No. The site is completely free, needs no account and has no usage limits.