These controls change only the simulated monitor preview.
Brightness app for Windows 10 and 11
Display Dimmer is a free Windows brightness app for laptops and monitors. Use hardware brightness or software dimming, with schedules, app rules and optional Pro color temperature.
Free brightness controlOptional one-time Pro upgrade
Powerful automation
Build schedules, react to the apps you use, and keep multiple displays working together automatically.
Warm one screen or your entire setup with precise color-temperature control.
Use DDC/CI to adjust your monitor’s own brightness when your display and connection support it. Display Dimmer tracks DDC/CI results for each display; after repeated failures, it can pause hardware control for the affected display and use software dimming instead.
Hardware brightness vs. software dimmingFree & Pro
Control brightness and contrast for free. Upgrade once for per-display temperature control, presets, more automation, and advanced tools.
Everyday brightness control.
Microsoft Store download · No Display Dimmer account required
Everything in Free, with more control.
Website checkout via Lemon Squeezy · License key by email
Hardware brightness depends on your monitor and connection. When DDC/CI is unavailable, Display Dimmer can use gamma dimming as a software fallback.
Microsoft Store reviews
Selected excerpts from Microsoft Store reviews.
“This one is nice and lightweight, responsive, and easy to use.”
“I find the schedules and app rules especially useful and it's been solid on my multi monitor setup.”
“Actually works, no bugs or lags. The app does exactly what it promises”
“I couldn't lower the brightness on my second monitor until I found this app, you can even control the contrast”
“Work as intended able to change my monitor brightness without going through OEM menu UI is super great!”
“Really usefull app! Had a problem with the app, developer responded in the most friendly and helpful way and is fixing the issue I found”
“Essential for anyone sensitive to bright screens, Baffling that it isn't pre-installed on every device ever”
“Display Dimmer is an excellent utility, that just works!”
Reviews & coverage
Independent reviews and software coverage from around the world.
Help & guides
Get help with Windows brightness and blue light filtering, from missing sliders and DDC/CI to HDR, docks, and external monitors.
Yes. Display Dimmer gives each detected display its own brightness and contrast controls. Adjust monitors individually or change all of them together, without reaching for their buttons. The controls are in Display Dimmer itself, rather than Windows’ built-in brightness panel.
Yes. Software dimming can make the image darker even when your screen is already at its lowest brightness setting. It adjusts the image rather than lowering the display’s physical backlight.
Hardware brightness control depends on your monitor and its connection. Enable DDC/CI in the monitor’s menu, then turn on Monitor controls (DDC/CI) for that display under Settings → Displays in Display Dimmer. If it still does not respond, try a direct connection without a dock or adapter, and temporarily turn off HDR. Software dimming may still work when hardware control is unavailable.
Yes. Display Dimmer can dim most built-in laptop screens and external monitors on Windows 10 and Windows 11. Use it with a single screen or adjust several displays from the same app. Hardware DDC/CI control depends on the monitor and connection; software gamma dimming works on virtually any Windows display and does not require DDC/CI support, though HDR and graphics changes can sometimes interfere. Using a USB-C dock? See our dock troubleshooting guide.
Free includes brightness and contrast controls across multiple displays, one all-display schedule, one all-display app rule, two all-display hotkeys, a daily 30-minute temperature preview, and free themes. Pro adds multiple schedules and app rules, more hotkeys, and per-display control; presets to save and recall display levels; custom linked display groups; per-display warm-to-cool temperature control without the daily preview limit; command-line automation; and all Pro themes. Pro is a one-time upgrade with no subscription.
Yes. The Temperature slider lets you choose warmer screen colors for one display or your whole setup. Start a free 30-minute preview once per day to try it on your own screens. Pro removes the daily preview limit and lets you automate temperature changes with schedules and app rules.
Your settings stay on your PC, and no Display Dimmer account is required. The app sends limited anonymous usage and reliability data; detailed diagnostics are only sent when you choose to share them. The website also counts Buy Pro clicks without cookies or visitor identifiers. See the privacy policy for details, including purchases and support.
For a website purchase, select Unlock Pro now on the purchase confirmation page, or activate manually using the license key in your receipt email. For a Microsoft Store purchase, make sure the Store is signed into the account that bought Pro. Our Pro activation guide explains both methods and how to restore access after reinstalling.
Free brightness control for your Windows setup.
