Cron 표현식 파서
Cron 스케줄 표현식 분석 및 시각화
* - Any value
1-5 - Range of values
*/5 - Every 5th value
1,3,5 - Multiple values
사용 방법
텍스트 붙여넣기 또는 입력
입력 영역에 텍스트, 코드 또는 데이터를 입력하세요.
옵션 선택
적용할 변환이나 포맷을 선택하세요.
결과 복사
한 번의 클릭으로 출력을 클립보드에 복사하세요.
이 도구를 사용하는 이유
100% 무료
숨겨진 비용도, 프리미엄 등급도 없습니다 — 모든 기능이 무료입니다.
설치 불필요
브라우저에서 완전히 실행됩니다. 소프트웨어를 다운로드하거나 설치할 필요가 없습니다.
프라이빗 & 안전
데이터가 기기 밖으로 나가지 않습니다. 어떤 서버에도 업로드되지 않습니다.
모바일 지원
완전 반응형 — 스마트폰, 태블릿, 데스크톱에서 사용할 수 있습니다.
Cron Expression Syntax for Scheduled Task Automation
Key Takeaways
- Cron expressions define recurring schedules using five fields: minute, hour, day of month, month, and day of week.
- Understanding cron syntax is essential for scheduling jobs in Linux, CI/CD pipelines, cloud functions, and task automation systems.
- All cron parsing happens in your browser — your scheduling data is never sent to any server.
Cron is the standard time-based job scheduling system in Unix-like operating systems, and its expression syntax has been adopted across the technology ecosystem. From Linux crontab to GitHub Actions schedules, AWS CloudWatch rules, and Kubernetes CronJobs, cron expressions are the universal language for defining recurring schedules. Parsing and validating these expressions prevents costly scheduling errors.
Cron syntax is supported by all major cloud platforms: AWS, GCP, Azure, and every CI/CD system.
Universal Adoption
Key Concepts
Five-Field Format
Standard cron: minute (0-59), hour (0-23), day of month (1-31), month (1-12), day of week (0-7 where 0 and 7 are Sunday). Extended formats add a seconds field.
Special Characters
Asterisk (*) means every value. Comma (,) lists values. Hyphen (-) defines ranges. Slash (/) sets intervals. Example: */15 means every 15 units.
Common Patterns
Daily at midnight: 0 0 * * *. Every 5 minutes: */5 * * * *. Weekdays at 9am: 0 9 * * 1-5. First of month: 0 0 1 * *. These patterns cover 90% of scheduling needs.
Platform Variations
AWS uses 6 fields (adding year). Some systems support @yearly, @monthly, @weekly, @daily, @hourly shortcuts. Kubernetes uses standard 5-field format. Always check your platform's documentation.
Pro Tips
Always test cron expressions by checking the next 5-10 run times to verify the schedule matches your expectations.
Use descriptive comments alongside cron entries to explain the purpose — future you will thank present you.
Be careful with day-of-month and day-of-week combined — in most implementations, they form an OR condition, not AND.
Account for timezone differences — cron typically runs in the server's local time unless UTC is explicitly specified.
All cron expression parsing is performed entirely in your browser. Your scheduling configurations are never transmitted to any external server.