Display Dimmer
Install free

These controls change only the simulated monitor preview.

Visible sliders
App theme

Brightness control for Windows

Simple brightness control for your Windows setup.

Adjust displays individually or together, use keyboard shortcuts, and schedule brightness changes. Add color-temperature control and unlimited automation with Pro.

Install free Explore Pro

Free brightness controlOptional one-time Pro upgrade

Interactive Display Dimmer controls
Display Dimmer
100%
Neutral · 50%
Pro Neutral · 6,500 K
4.9 from 230 Microsoft Store ratings
80,000+ Windows installs
One-time Pro upgrade · No subscription

Powerful automation

Set it once. Let Display Dimmer handle the rest.

Build schedules, react to the apps you use, and keep multiple displays working together automatically.

Display Dimmer Settings demonstrating display controls, a brightness schedule, and an app rule.
Blue light filtering

Warmer screens. On your terms.

Warm one screen or your entire setup with precise color-temperature control.

  • 30 min/day free
  • Unlimited with Pro
  • Schedule warmer evenings
Display compatibility

Hardware when possible. Software when needed.

Use DDC/CI to adjust your monitor’s own brightness when your display and connection support it. When hardware control isn’t available, software dimming can darken the image instead.

Hardware brightness vs. software dimming
  • Hardware brightness DDC/CI · Supported monitors
  • Software dimming Gamma · Software fallback

Free & Pro

Start free. Upgrade once.

Control brightness and contrast for free. Upgrade once for unlimited temperature control, more automation, and advanced tools.

Free

$0Free version

Everyday brightness control.

  • Brightness & contrast control
  • Adjust displays individually or together
  • DDC/CI with gamma fallback
  • Temperature preview — 30 minutes a day
  • 1 schedule + 1 app rule for all displays together
  • 2 hotkeys for all displays together
Install free

Microsoft Store download · No Display Dimmer account required

Pro

$5.99One-time purchase · No subscription

Everything in Free, with more control.

  • Unlimited color-temperature control
  • Unlimited schedules & app rules
  • Unlimited hotkeys
  • Per-display automation & linked display groups
  • Command-line & local automation
  • Additional themes
Buy Pro

Website checkout via Lemon Squeezy · License key by email

Prefer Microsoft Store? Upgrade inside the app.

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

Built to quietly do its job.

What people are saying about Display Dimmer.

4.9230 ratings Read Store reviews
“Nice. Actually works, no bugs or lags. The app does exactly what it promises.”
ArtemUkraine
“The only one that really works! Display Dimmer is an excellent utility that just works.”
JanSouth Africa
“I find the schedules and app rules especially useful and it’s been solid on my multi monitor setup.”
jetUnited States

Reviews & coverage

Display Dimmer around the web.

Independent reviews and software coverage from Windows publications.

MajorGeeks Software overview A practical look at Display Dimmer Multi-monitor brightness control, schedules, DDC/CI, and fallback dimming. View on MajorGeeks SOFTPEDIA Tested review Per-monitor controls put to the test An independent review of brightness, contrast, schedules, and app rules. Read the Softpedia review gHacks Hands-on review Monitorhelligkeit unter Windows steuern A German review of external-monitor control, DDC/CI, and gamma fallback. Read on gHacks · German

Help & guides

Brightness control guides and answers.

Set up brightness control and blue light filtering for Windows, or troubleshoot missing sliders, DDC/CI, HDR, docks, laptops, and external monitors.

All guides
Brightness slider for external monitorsAdd per-monitor brightness control. Screen dimmer for WindowsDim laptop and external screens. Blue light filter for WindowsUse the Temperature slider for warmer colors. How to enable DDC/CIFind the monitor setting for hardware brightness. Windows 11 brightness slider missingWhy external monitors need a separate slider. Adjust display brightness on WindowsChoose the right method for laptop and external screens. HDR and brightness controlWhat to do when HDR blocks DDC/CI.

Common questions

Can it add a brightness slider for 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.

Can it dim a screen below its lowest brightness?

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.

Why doesn’t DDC/CI work on my monitor?

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.

Does it work with laptops and external monitors?

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. Available controls depend on your display and connection. Using a USB-C dock? See our dock troubleshooting guide.

What’s the difference between Free and Pro?

Free includes brightness and contrast controls, one schedule, one app rule, two hotkeys, and a daily 30-minute temperature preview. Pro unlocks unlimited schedules, app rules, hotkeys, and temperature control, plus per-display automation, linked display groups, command-line control, and additional themes. Pro is a one-time upgrade with no subscription.

Does Display Dimmer have a blue light filter?

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 unlocks unlimited use and lets you automate temperature changes with schedules and app rules.

What data does Display Dimmer collect?

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.

How do I activate Pro after purchasing?

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.

Your screens. Just right.

Free brightness control for your Windows setup.

Install free