# Run processing sketch without window?

**URL:** <https://discourse.processing.org/t/run-processing-sketch-without-window/1826>\
**Category:** Coding Questions\
**Created:** [July 16, 2018, 6:33pm UTC](https://discourse.processing.org/t/run-processing-sketch-without-window/1826 "2018-07-16T18:33:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cumulus](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/cumulus/32/451_2.png) [@cumulus](https://discourse.processing.org/u/cumulus)\
**Post date:** [July 16, 2018, 6:33pm UTC](https://discourse.processing.org/t/run-processing-sketch-without-window/1826/1 "2018-07-16T18:33:12Z")

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Is it possible to run a processing sketch without having the applet window appear?  
This would be very useful for extensively testing non-processing functionality inside the draw call.  
The draw function should still be called of course, just without being displayed on screen.  
Any suggestions?

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**Author:** ![kfrajer](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/kfrajer/32/196_2.png) [@kfrajer](https://discourse.processing.org/u/kfrajer)\
**Post date:** [July 16, 2018, 6:44pm UTC](https://discourse.processing.org/t/run-processing-sketch-without-window/1826/2 "2018-07-16T18:44:50Z")

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Check for previous posts running Processing in headless mode. There is a wiki entry in Processing GitHub.

Kf