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I'm sure there would be some freeware out there that does this, but for all my research I've failed to find anything!

So what I want: a piece of software that uses the webcam to automatically adjust the screen brightness of my monitor (not my laptop's screen). I would like it to have some customization abilities so I can specify how frequently I want it to check the light and change screen brightness (rather than constantly being on). I would also like a smooth transition when changing the brightness, but this is a nice feature, not a strictly necessary one! This software must be free (I don't care if it's open source or just shareware)!

2 Answers 2

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SoftonEyes (SoftPedia) seems to work pretty well. Not very feature rich but it does change the brightness based on the light picked up from the webcam.

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  • Do not use this program! Avira detected a virus.
    – Gray Adams
    Aug 10, 2016 at 0:27
  • @GrayAdams: Do you have a link to a screenshot? All antiviruses here do not find any virus in it: virustotal.com/en/file/…
    – Nicolas Raoul
    Aug 10, 2016 at 3:29
  • It doesn't use the native display brightness (on laptops). Instead it manually changes color balance. Jan 15, 2017 at 15:39
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f.lux does this: it makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.

You can download it here

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    I've used f.lux, it doesn't change the brightness of the screen and surely not using a webcam, it depends upon the local time + timezone and adds yellow color to the screen which is subtle to users eyes
    – Mr. Alien
    Jul 27, 2014 at 7:38

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