Cron

Umbra's Cron tool builds a standard 5-field cron expression field by field, or reads one back when you paste it in — entirely offline.

Set the minute, hour, day-of-month, month, and day-of-week fields individually with a guided grid, or paste an existing expression to see it explained in plain language and previewed against its next three run times. There's no free-text guessing on either side — every field is picked from a fixed set of valid values.

FAQ

• Why not use a free online cron generator?

  A cron expression alone reveals nothing sensitive, so the privacy case is weaker here than elsewhere in Umbra — but it's still one tool fewer to leave the app for (the same standard 5-field syntax crontab uses).

• Does it understand phrases like "every day at 5pm"?

  No, deliberately — Umbra used to parse free-text phrases into cron expressions; that parser was retired for a guided grid that can't be phrased wrong. Paste an existing expression instead and Cron reads it back in plain language.