Blurry apps on mixed-DPI screens: how to check

An app looks sharp on your laptop screen but blurry on the monitor beside it. Or its text turns fuzzy when you drag the window from one display to another. Different display sizes and scaling settings can cause this, but a low resolution or an app that needs an update can look similar.

Check the resolution and scale reported for each display, then compare the same app in the same conditions. The Screens tool can show the details your browser can access for connected screens. It cannot tell whether an individual app is using the right scaling mode, so use it alongside the checks below.

Inspect the displays and compare the app

1. Open the Screens tool. Find each connected display and note its reported resolution and scale.
2. Open the blurry app and move its window fully onto one display. Check small text and thin lines, then move it to the other screen and compare. Give the app a moment to redraw after moving it.
3. Repeat the comparison with the same view, window size, and app zoom. If possible, compare text in the app itself rather than judging a photo of the screens.
4. Check your operating system's display settings for each monitor. Compare its selected resolution and scale with the recommended options shown there.
5. If the app stays blurry, close and reopen it on the display where you want to use it. Some apps only update their scaling when they start.

A difference in scale between monitors is not automatically a problem. A small, high-resolution screen may need a larger scale than a big monitor so text stays readable. The important clue is whether the app looks soft compared with other content on the same display.

What the result means

The app is blurry only on one display

The app may not be adapting to that screen's scaling, or the screen may be set to a non-native resolution. Check the display's resolution first. If other apps look sharp there, focus on updating or adjusting the affected app.

The app gets blurry when you move it between screens

The app may not redraw correctly when the display scale changes. Close and reopen it on the screen where you plan to use it. If the problem persists, check the app's update options and, on Windows, its high-DPI compatibility setting.

Everything on one screen looks soft

The monitor may be using a resolution other than its native resolution, which is the panel's intended pixel grid. Check the operating system's recommended resolution. A cable, dock, or display adapter can also limit the available resolution.

Only one app looks blurry on both screens

The issue is more likely to be that app's rendering, zoom, or compatibility than the displays. Check its own zoom or display settings, install available updates, and compare it with another app showing similar text or graphics.

The screens report different scales

That is normal on displays with different pixel densities. The Screens tool reports screen details available to the browser, not whether a particular desktop app supports mixed scaling. For a closer look at how scale differs between systems, see how to compare screen scale on a Mac and PC.

How to fix blurry apps

1. Use the recommended resolution and scale. On Windows 11, open Settings › System › Display, select the display, and check Display resolution and Scale. On macOS, open System Settings › Displays, select the display, and choose a recommended resolution or scaling option. Test one display at a time so you can tell what changed.
2. Let Windows adjust blurry apps. In Windows 11, open Settings › System › Display › Scale › Advanced scaling settings and turn on Let Windows try to fix apps so they're not blurry, if that option appears. Close and reopen the app. macOS does not have an equivalent system-wide switch for individual apps, so update and relaunch the affected app.
3. Check the app's own zoom or display options. Set its zoom back to a normal value, such as 100%, as a test. If only its menus or text look soft, look for an app update or a setting related to high-resolution displays.
4. Try the Windows high-DPI override for one app. Right-click the app shortcut, open Properties › Compatibility › Change high DPI settings, and select Override high DPI scaling behavior. Test one option at a time, since an override can make some apps or controls look worse. You can return to this screen and turn the override off.
5. Check the connection if a display has no recommended resolution. Connect the monitor directly to the computer if practical, try another supported cable or port, and check whether the dock or adapter supports the monitor's resolution. On Windows 11, review Settings › System › Display again after reconnecting. On macOS, check the available choices in System Settings › Displays.
6. Update and restart the app and computer. Install updates for the affected app and your operating system, then restart. This is worth trying if blurriness began after an update, a display was added, or the computer woke from sleep.

Why mixed-DPI screens can blur one app

DPI describes how many pixels fit into a physical inch. Operating systems use scaling to make text and buttons readable on screens with different pixel densities. At a non-native resolution, the monitor has to stretch the image across its physical pixels, which can soften fine edges.

Apps also differ in how they handle scaling. A newer app can redraw its text and controls at the scale of the display it's on. An older or incompatible app may instead enlarge an already-rendered image, making it look blurry. Moving the window between screens is a useful test because it can reveal whether the app responds to the new display scale.

The Screens tool can help you compare reported screen details, but it cannot inspect an app's internal scaling behavior or prove that a monitor is faulty.