f.lux download!

Finish setting up f.lux by downloading the app.

If your download does not begin, please click here to try again.

f.lux is available for platforms:

1. Download the app
You will be redirected to an external website to complete the download.
2. Install the software!
After installing will be completed on your computer, open the app.
3. Start the app!
Now you can enjoy using the software on Desktop!

f.lux changes the color of your Desktop depending on the time of day, warm at night and like sunlight during the day. When the sun sets, it makes your computer look like your indoor lights. In the morning, it makes things look like sunlight again.

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Recent changes:

Version v4

  • Bedtime mode: this extra-warm mode gets you ready for sleep and also helps you customize f.lux’s timing to work better with your actual schedule
  • Circadian response is shown when you change settings, to show how light affects your circadian system
  • Backwards alarm clock reminds you how long it is until you wake up, hopefully to get you to bed a little earlier
  • Presets to help pick your settings, or reset things when you get stuck
  • Color filters for eyestrain and other uses
  • A wider range of color settings (including very cool colors)
  • You can tell f.lux to disable when particular apps are running, or when watching fullscreen movies and games
  • There are new hotkeys to adjust color a little bit at a time (Alt+Shift+PgUp and Alt+Shift+PgDn)