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Cron Expression Builder
Visually craft cron expressions with presets, interval selectors, and quick toggles. Copy the expression and preview the next scheduled runs instantly.
How to use this tool
- Choose field modes and values, or start from a quick preset.
- Switch between Unix and Quartz dialects when needed.
- Copy the generated expression and export a schedule report with next run previews.
Builder workflow
- Each field supports every, interval, or specific-value selection.
- Quick groups accelerate common schedules such as weekdays or quarter hours.
- Live preview helps validate timing before deployment.
Production tips
- Confirm dialect requirements for your scheduler before copying.
- Keep expressions readable and documented with a summary line.
- Validate timezone expectations in downstream systems.
FAQ
- What is the difference between Unix and Quartz here?
- Unix uses 5 fields, while Quartz adds a leading seconds field for 6 total fields.
- Can I export the configuration?
- Yes. Export JSON or TXT reports that include expression, summary, and preview runs.
- Why is my expression empty?
- Specific mode requires at least one selected value per field before the expression can be generated.
Resources
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