Cron Expression Parser
Parse cron expressions into human-readable descriptions. Includes common presets for quick reference. Presets plus plain-English schedules prevent 3am surprises — local parsing, free, no signup.
How to Use the Cron Expression Parser
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Frequently Asked Questions
What cron formats are supported?
Standard 5-field cron format (minute, hour, day-of-month, month, day-of-week). Supports wildcards, ranges, lists, and steps.
What are the common presets?
Ready-to-use presets for hourly, daily, weekly, monthly, and yearly schedules. Common intervals like every 5 minutes or every Monday are included.
Does it explain each field?
Yes. Each cron field is parsed and displayed with its meaning. You can see exactly what '0 2 * * 1-5' means (weekdays at 2 AM).
Can I validate cron expressions?
Yes. Invalid expressions are flagged with error messages. The tool checks for valid ranges, correct field count, and proper syntax.
When using Cron Expression Parser, is the parsing done locally?
Yes. All parsing happens in your browser. No cron data is sent to any server.
What are the exact field bounds, and how are next runs found?
Minute 0-59, hour 0-23, day 1-31, month 1-12, weekday 0-7 (7 is normalized to Sunday 0). Steps, ranges and lists validate against those bounds, and the tool scans minute-by-minute up to 525600 iterations (about a year) to list the next 3 runs.
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Last updated October 2026