Cron expression parser
Validates a standard five-field cron expression, explains each field, and shows the next several run times.
1 · Input
Standard five-field Unix cron only. Quartz-only syntax (seconds field, L/W/# characters) is flagged as unsupported rather than silently misread. When "Browser local time" is selected, a next-run time near a daylight-saving transition may shift by an hour from what a naive reading of the expression suggests - this is a real property of local-time scheduling, not a bug in this tool.
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What this does
Validates syntax field by field, explains what each field and the whole expression mean in plain English, and computes the next several run times in either your browser's local time zone or UTC.
Honest about DST and unsupported syntax
When local time is selected, a next-run time that crosses a daylight-saving transition can shift by an hour from what a naive reading of the expression suggests - that is a genuine property of local-time scheduling, and this tool notes it rather than hiding it. Quartz-only syntax (a seconds field, or L/W/# characters) is flagged as unsupported rather than silently misinterpreted as standard cron.
Privacy
Parsed entirely in your browser - nothing is sent to a server.
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