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Cron to Quartz Converter

Bridge the gap between Unix Cron and Java Quartz schedulers with bidirectional conversion.

Unix Cron

Input expression

Quartz Result

Converted expression

0 0 12 * * ?

Human Readable Explanation

What this schedule actually does

""

* Note: "?" and "L" (Last day) are common in Quartz but may not work in basic Unix crontabs. Check your scheduler's documentation.

Unix Cron Standard

Quartz Scheduler is a job scheduling library for Java applications. It uses a cron-like expression format but with some differences, such as the use of "?" (no specific value) and "L" (last).

Quartz Cron Standard

Standard Quartz format uses 6 or 7 fields. The seconds field is mandatory, and the year field is optional. Use "?" for days of week/month if not specified.

Common special characters:

  • ?: No specific value. Used when you don't care about the value of a field. For example, if you specify a day of the month, you can use '?' for the day of the week.
  • L: Last. Can be used in Day-of-month (e.g., "L" for last day of month) or Day-of-week (e.g., "6L" for last Friday).
  • W: Weekday. Used in Day-of-month to specify the nearest weekday to the given day.
  • #: Nth day of the month. Used in Day-of-week (e.g., "6#3" for the third Friday of the month).

Cron to Quartz Converter

Translate Unix Cron strings to Java Quartz scheduler format and vice versa with bidirectional conversion.

1

Enter Expression

Type or paste your Unix Cron or Quartz expression.

2

Toggle Direction

Select 'Unix to Quartz' or 'Quartz to Unix' based on your needs.

3

Real-time Update

The equivalent string appears instantly as you type.

4

Review Explanation

Check the 'Human Readable' section to verify the timing logic.

Frequently Asked Questions

Unix Cron has 5 fields (minutes to weekdays), while Quartz uses 6-7 fields including seconds and years.

Quartz uses '?' to avoid conflicts between Day-of-Month and Day-of-Week fields.

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