1
Open source
ScreenTemperature reduces blue light from a display and provides brightness controls.
Alternatives
The Best f.lux Alternatives in 2026
10 alternatives1 free · 3 open source
Looking for something like f.lux? Here are 10 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 1 are free or have a free plan and 3 are open source.
f.lux adjusts computer screen lighting for the time of day, reducing the blue glow of a display at night.
Top picks at a glance
First suggestionScreenTemperatureScreenTemperature reduces blue light from a display and…Free or freemium optionNVDANVDA provides a screen reader that can be downloaded free…Another optionLightBulbLightBulb adjusts screen gamma based on the time of day to…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | ScreenTemperature | — | Yes | Windows |
| 2 | LightBulb | — | Yes | — |
| 3 | SpaceDesk | — | Not stated | Android, iOS, macOS |
| 4 | NVDA | Free | Not stated | Web, Windows |
| 5 | ParkControl | — | Not stated | Web, Windows |
| 6 | Deskreen | — | Not stated | Web |
| 7 | Display Calc | — | Not stated | iOS, Web |
| 8 | Multi-Monitor Calculator | — | Not stated | Web |
| 9 | Dimmer | — | Not stated | Web, Windows |
| 10 | Deskreen | — | Yes | — |
All f.lux alternatives
2
Open source
LightBulb adjusts screen gamma based on the time of day to reduce eye strain.
3
SpaceDesk
spacedesk.netAlso covers macos · same kind of website
spacedesk extends a computer display to other devices over USB, Wi-Fi, or LAN, with viewers for mobile and Windows.
4
Same kind of website · free
NVDA provides a screen reader that can be downloaded free of charge to make computers accessible to blind users.
5
ParkControl
bitsum.com/parkcontrolSame kind of website
ParkControl displays and adjusts Windows CPU core parking and processor scheduling settings, with power automation features.
6
Deskreen
deskreen.comSame kind of website
Deskreen shares a computer screen to devices through a web browser, including phones, tablets, and other computers.
7
Display Calc
tools.rodrigopolo.com/DisplayCalcSame kind of website
Calculate display distance, screen dimensions, aspect ratio, and PPI with this display calculator.
8
Multi-Monitor Calculator
multimonitorcalculator.comSame kind of website
Plan a multi-monitor setup by calculating PPI and screen dimensions, previewing wallpapers, and rearranging displays.
9
Dimmer
nelsonpires.com/software/dimmerSame kind of website
Dimmer provides brightness controls for multiple computer displays through a small Windows application.
10
Open source
Deskreen turns a device with a web browser into a secondary screen for a computer.
No alternatives match this filter.
Alternatives to similar tools
ScreenTemperature24 alternativesLightBulb24 alternativesDeskreen9 alternativesMulti-Monitor Calculator5 alternativesDeskreen24 alternatives
What is the best alternative to f.lux?
Based on features, tags and platforms, the closest alternatives to f.lux are ScreenTemperature, LightBulb, and SpaceDesk.
Is there a free alternative to f.lux?
Yes. NVDA is free or offer a free plan.
Are there open-source alternatives to f.lux?
Yes: ScreenTemperature, LightBulb, and Deskreen.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative