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Build cron schedules with plain-English preview. Use for automation timing. Input: fields or presets. Returns expression + next runs. 100% client-side.
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A visual cron expression builder that constructs cron schedules from human-friendly controls and displays the expression in real-time. Includes preset buttons (@yearly, @monthly, @weekly, @daily, @hourly), a human-readable description, a table showing the next 10 execution times, timezone selection, 6-field cron support (with seconds), @macro expansion, favorites/saved expressions, and export as systemd timer or crontab format.
Cron expressions are notoriously error-prone to write by hand — a misplaced asterisk can cause a job to run too frequently or never. A visual builder eliminates syntax errors, provides immediate feedback through descriptions and execution preview, and supports multiple cron variants for the full spectrum of scheduling needs.
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DevOps engineers managing scheduled jobs, backend developers setting up cron tasks, system administrators automating maintenance scripts, and anyone learning cron syntax.
Use the visual form to set minute, hour, day-of-month, month, and day-of-week — dropdowns prevent invalid entries
Select from preset buttons (@yearly, @monthly, @weekly, @daily, @hourly) to auto-populate fields
Toggle '6-Field Mode' to add seconds precision (format: sec min hour dom mon dow)
Read the human-readable description — updates in real-time explaining the schedule in plain English
View 'Next 10 Executions' table to validate the schedule — shows exact dates/times in selected timezone
Save expression as favorite with custom name, or export as crontab entry or systemd timer unit
Config: Every weekday at 9:00 AM => Expression: '0 9 * * 1-5' | Description: 'At 09:00 AM, Monday through Friday'Config: First Monday of every month at 2:30 AM => Expression: '30 2 * * 1#1' | Next 10: Shows each first Monday at 02:305-field vs 6-field cron?
Standard uses 5 fields. 6-field adds seconds at the beginning. Not all systems support 6-field.
How are @macros expanded?
@yearly = 0 0 1 1 *, @monthly = 0 0 1 * *, @daily = 0 0 * * *, @hourly = 0 * * * *
Can I export to systemd?
Yes, click 'Export as Systemd Timer' for OnCalendar= syntax.
Do next 10 executions account for DST?
Yes, timezone-aware calculation handles daylight saving transitions.
Authoritative specifications, standards, and in-depth reading for Cron Expression Generator.
Cron Expression
0 0 * * *
At 00:00
Next Execution Times
Field Explanations
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