Cron Explainer
Turn cron expressions into human-readable schedules and common automation timing notes.
Schedule
Cron expression
0 9 * * *Explanation: Every day at 09:00
notes
Server cron typically uses the machine timezone. For Korea-facing schedules, double check against the KST converter.
This tool runs in your browser. Inputs stay local and are not sent to any server.
How to use this result
Cron is compact but easy to misread. A readable explanation helps prevent scheduling mistakes.
Examples
Daily morning
Common questions
Q.Does cron include seconds?
Traditional cron uses five fields; some systems add a seconds field.
Data handling notice
Browser-local processing: the main calculation or conversion runs in your browser.
No server storage: except for UI preferences such as favorites, ZHS does not store your input files or text on the server.
Sensitive-data caution: even with local processing, avoid entering production secrets, national IDs, financial data, or raw customer data into public web tools.