10 Best Free Monitor Brightness Control Software [2023 List]

One of the most obvious things that can show the strain of being at your computer for a period of time is your eyes. It doesn’t take a lot for a badly configured monitor or laptop screen to cause problems and put extra strain on your eyes because brightness or contrast settings are set too high. Proper configuration can make viewing more comfortable, especially you are at your computer for prolonged periods of time.

Most monitors should have controls to adjust these types of settings but that isn’t always the case. An old Dell Studio One 1909 desktop we have here, is one such system without external controls for brightness and contrast. Laptops and netbooks should have a dedicated Fn key combination or utility from the manufacturer for brightness. Windows sometimes has a brightness slider in the notification area or the system power plan.

If you don’t have or cannot find brightness and contrast controls to adjust the display to your liking, an option is using a third party tool. Here’s a selection of 10 free programs to adjust the brightness, contrast, gamma or color temperature settings of your computer screen.

1. ClickMonitorDDC

ClickMonitorDDC is probably the most powerful utility of its type and it adjusts the real settings of your monitor. By default, it shows sliders for brightness, contrast, saturation/vibrance, monitor audio volume, and device audio volume. This can be expanded to include red, green and blue sliders if your monitor has a User profile. If available, the User profile can be selected from the top drop down in the lower left corner.


Besides using the sliders, numbers or the mouse wheel in the user interface to adjust the settings, there are also icons in the system tray showing the current values. Hovering over any of the tray icons and scrolling will alter that specific value on the fly. There are also buttons to turn off all monitors, the current monitor, rotate the display, and reset the monitor’s settings back to factory default.

ClickMonitorDDC has a vast array of settings (tiny top-left button) to control a number of options. These include tray icons and colors, mouse wheel commands, hotkeys, add commands to the tray icon context menu, timers and limits, and autorun commands when a specific program is run. Most of these options require ClickMonitorDDC’s command line arguments to function so you will need to have a good read of the help guide. There is a portable or setup installer version.

Download ClickMonitorDDC

2. Win10 Brightness Slider

If you are looking for a simple slider to adjust screen brightness and require no extra functions or features, this is a useful option. Despite the name, Win10 Brightness Slider also works on Windows 7 (needs .NET Framework 4 or higher) and Windows 8.1, is open source and a standalone executable.

Win10 brightness slider

The program just sits as an icon in the tray notification area and left clicking on it will popup the brightness slider. A second or third slider will be available if you have a multiple monitor setup. DDC/CI is supported and there’s a run on startup option in the icon’s context menu. Make sure to put the program in a permanent location before enabling run on start as the tool will be launched from its current location.

Download Win10 Brightness Slider

3. Gamma Panel

Gamma Panel actually dates way back to 2002 but still seems to work fine in Windows 10. It should be good for users who want to change a bit more than just the standard brightness of their display. In addition to brightness, Gamma Panel can also adjust gamma and contrast with the added ability to allow each of the Red, Green and Blue colors to be tweaked individually or all together.

Gamma panel

Another useful option is creating different profiles that can be activated with a pre-defined hotkey. You can, for example, set up a night profile or a reading profile and activate it when you feel the need by pressing the key combination or from the right click tray menu. You also get a little LUT (LookUp Table) graph with its associated value from the results of the changes.

Download Gamma Panel

4. f.lux

Windows 10 has a built-in display temperature feature called Night Light. f.lux is a similar but more feature rich tool that can adjust the color and brightness of your screen depending on the time of day and light condition of the local environment. Your location can be entered during the first run of the program, this can be a city name, a zipcode or coordinates (if you know them).


While you can just leave the default settings and the program will work fine, there are a number of options for tailoring the colors and temperatures to your liking. There are several preset colors available at the top right drop down, a custom warmness slider, effects and extra colors in the settings menu and options for setting up f.lux with smart lighting such as Philips Hue.

Download f.lux

5. ScreenBright

ScreenBright is a free and portable tool that can adjust the brightness, contrast, color luminance and color temperature of your display. There is a slight drawback of the program needing a DDC/CI or USB-control compatible display to work, which not all monitors or laptop screens will have. Usage is simple and you adjust the sliders then click Save when you’re happy with the result.


In addition to brightness, contrast, and luminance, there’s a vertical slider that affects green levels while the horizontal slider affects color temperature. There is no reset option in ScreenBright so make sure you note down the default settings before you start. ScreenBright also has support for command line arguments so you can use it in shortcuts, scripts or even set up a scheduled task.

Download ScreenBright

6. Gammy

Gammy is an interesting tool because it works by auto adapting the brightness of the display depending on what is on screen. It does this by taking and analyzing several screenshots per second in the background. Open a window with a lot of light colors and Gammy will lower the brightness. Have lots of dark areas on the screen and the brightness will be raised. Gammy is a portable and open source program.


The Min and Max brightness levels will control how high and low the brightness can go while the Temperature slider will lower the blue levels at the same time. There are other sliders in the window although you probably won’t need to touch them unless you know how the program works. Uncheck the Auto box to get a standard brightness slider which adjusts brightness manually.

Download Gammy

7. Desktop Lighter

Desktop Lighter lets you adjust the brightness of your screen by clicking on the tray icon and adjusting the slider up and down, or by using keyboard hotkeys. The only real problem with Desktop Lighter is it was released in the XP era and its slider looks very dated in Windows these days.

Desktop lighter

The keyboard combination to alter brightness is Ctrl+< and Ctrl+> which is very similar to proprietary software and Fn key hotkeys found on many laptops. The other options available are starting with Windows, widening the slider and remembering brightness settings.

Download Desktop Lighter

8. Eye Saver

Eye Saver has a few interesting features apart from being able to set the standard options of brightness and color temperature. It has a Breaks tab which allows you to set up a deliberate interruption that reminds you to look away or take a break from staring at the screen for a few minutes. Another feature is the automation rules window where you can apply one of the built-in modes to specific running programs.

Eye saver

Thre are seven built-in mode presets that set brightness and temperature to a pre-configured level. New modes cannot be added but if you alter the settings of a current mode, they will be remembered until you press the restore button. Modes and breaks can be accessed quickly from the context menu of the tray icon. Three effects can also be applied but they are mostly for fun and probably have little practical use.

Download Eye Saver

9. Free Monitor Manager

Although Free Monitor Manager is obviously free to use, it’s a shame that some of the best features like hotkeys, switch profiles with the mouse, and activate on application are only available in the paid version. There are still some useful features available in this free version, like selectable profiles and support for multiple monitors.

Free monitor manager

After install, click on the tray icon to open the main window. From there, you can change brightness, contrast, red/green/blue, select a different monitor or save and select user profiles. Pressing the restore button resets the monitor settings to the point before Free Monitor Manager was installed. A start with Windows option is available but most other settings are trial only.

Download Free Monitor Manager

10. RedShift GUI

RedShift GUI works similarly to f.lux and Windows Night Light by automatically altering the color and brightness of the screen. It does this to change the warmness of the display which should make things easier on the eyes during the evenings and night time. RedShift GUI hasn’t been updated since 2010.

Redshift gui

Select your location either from your IP, town/city or type your own coordinates if you know them. It appears the city/zipcode option no longer works because of the program’s age. As the sun rises or sets in your location, the display temperature will change to reflect it. There’s a disable auto adjust option and a simple slider to adjust brightness manually. Portable, setup installer and Linux versions are available.

Download RedShiftGUI

Changing Brightness Using the Built-in Video Driver

If you have a common video adapter from the likes of Nvidia, AMD or Intel, you will have the ability to change settings such as brightness, contrast and gamma from within the driver’s own configuration window. If you just want to make a fine adjustment and leave it, this is a useful option.

For Nvidia Graphics Adapters

Right click on the Desktop and select “NVIDIA Control Panel”. Then click on “Adjust desktop color settings” in the display tree on the left hand side navigation bar.

Nvidia control panel color settings

Choose the display if you have more than one, and then select “Use NVIDIA settings”, you can now move the slider for Brightness, Gamma and Contrast. Digital vibrance and Hue can also be changed. Click Apply once you’re finished.

For AMD Displays

AMD/ATI video drivers also have the ability to alter brightness, contrast and gamma settings for the display, although access to the settings pane for these values can differ between driver versions.

Amd Catalyst Control Center color settings

All you need to do is right click on the desktop and select “Catalyst Control Center” from the context menu. The options should be under the Color, “Display Color” or “Dekstop Color” section.

For Intel Displays

The Intel driver brightness settings are easy to get to, right click on the desktop or in the system tray and select “Graphics Properties…”, or find the Intel driver option in Control Panel.

Intel control panel color settings

Click on “Color Correction” or “Color Settings” down the left and adjust your settings for gamma, brightness, and contrast. Click Apply or OK when you have finished.

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