Cron Expression Generator

Visually generate and parse Cron scheduled task expressions, supports Linux, Spring, and Quartz formats, and preview execution times

Bug report

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Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

Return to old version

Set first, then process:Choose a Cron format and template, then adjust fields; the result area will update the description and next run times.

1Generate Cron Expression

Supports three common formats: Linux Crontab, Spring @Scheduled, and Quartz CronTrigger.

Cron Format Switching will use the default fields for that format

Quick templates Apply directly, then fine-tune

Field Settings Supports specific values, ranges, steps, and common special rules

sec0-59

*

minutes0-59

*

Hours0-23

*

Date1-31

*

Month1-12

*

Weekday0-6

*

Year1970-2099

*

Results Linux 5 fields

Next Run Times Calculated using current device time

Format quick reference Field count varies by environment

Format	Field order
Linux	`分时日月周`
Spring	`秒分时日月周`
Quartz	`秒分时日月周年`

2Parse Cron expression

Paste an expression to view field meanings, compatibility tips, and future run times.

Parse format Cron expression

Parse Result Field details and run preview

Enter an expression and click Parse.

3Batch parse & settings

One expression per line. Batch-generate descriptions and future run times; the UI shows the first 20, export includes all results.

Batch format

Input rules Blank lines and comment lines are supported. If command content follows the expression, only the leading fields are read based on the current format.

Bulk Results Waiting to parse

Results will appear here.

Settings Management Save common formats, field settings, and batch input

Current Format Linux 5 fields

Current expression * * * * *

Save status Not saved yet.

Instructions

Software Usage Instructions

Select a Cron format: Choose the Linux, Spring, or Quartz format based on your use case. Linux has 5 fields, Spring has 6 fields, and Quartz has 7 fields.
Apply a quick template: You can choose templates such as every minute, every 5 minutes, every day at 9:00, weekdays at 9:00, every Monday, the 1st of every month, or the end of the month, then adjust the fields as needed.
Configure time fields: Fields such as minute, hour, day, month, and weekday support any value, specified values, ranges, and steps; Spring and Quartz also support some extended rules.
View the generated result: The tool synchronously displays the Cron expression, English description, format tips, and future execution times. You can copy the expression or description with one click.
Parse an existing expression: In the parse preview, select a format and enter an expression to view field meanings, compatibility tips, and execution times.
Batch parse and export: In Batch & Settings, enter one expression per line. After clicking batch parse, you can view the first 20 results and download a TXT report.
Save common settings: Click Save Settings to record the current format, field configuration, and batch input content for continued use next time.

FAQ

A: Linux Crontab uses 5 fields, in the order minute, hour, day, month, weekday; Spring uses 6 fields, adding a seconds field at the beginning; Quartz commonly uses 7 fields, adding a year field to the Spring format and supporting more extended symbols.

A: * means any value, / means step, - means range, and , means multiple values. For example, */5 means trigger at intervals of 5 units, 1-5 means 1 through 5, and 1,3,5 means the specified values 1, 3, and 5.

A: You can directly select the “Weekdays at 9:00” template. The Linux format is 0 9 * * 1-5, the Spring format is 0 0 9 * * 1-5, and the Quartz format is 0 0 9 ? * 2-6 *.

A: In Linux crontab, when both day of month and day of week are restricted, it usually triggers if either field matches; how Spring and Quartz handle this depends on the specific scheduler implementation. To avoid unintended triggers, in Quartz scenarios it is recommended to set the unused day-of-month or day-of-week field to ?.

A: Standard Linux crontab usually does not support extended symbols such as L, W, and #. These symbols are more commonly used in Spring or Quartz scenarios, such as rules for the last day of the month, the nearest weekday, or the Nth occurrence of a weekday.

A: Batch parsing processes all entered expressions, but the interface only displays the first 20 to prevent the page from becoming too long. To view all results, click to download the TXT report.

A: First confirm that the number of fields matches the target system, then check the weekday value rules, time zone settings, special symbol compatibility, and whether the task service is running. Expressions cannot be used interchangeably between Linux, Spring, and Quartz.

Cron Expression Generator

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Tool Usage

1Generate Cron Expression

2Parse Cron expression

3Batch parse & settings

Instructions

Software Usage Instructions

FAQ

Q: What is the difference between Linux, Spring, and Quartz formats?

Q: What do *, /, -, and , mean in a Cron expression?

Q: How do I set it to run at 9:00 every weekday?

Q: How should I interpret it when both the day field and weekday field are set?

Q: Can symbols like L, W, and # be used in Linux?

Q: Are there display limits for batch parsing?

Q: What should I do if the expression does not take effect in the system after it is generated?

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