Your Screen Details
These values update automatically if you resize the browser or rotate your device.
Everything is detected locally in your browser. Nothing is uploaded.
Want the wallpaper to match your screen better?
Use your detected resolution and aspect ratio to crop or adapt wallpapers more accurately for mobile, desktop or ultrawide screens.
Common Screen Resolutions
If you searched for common screen resolutions, popular phone resolutions or standard monitor sizes, these are some of the most widely used screen dimensions. They are helpful when choosing wallpapers, designing responsive layouts or exporting screenshots and backgrounds.
Your exact values may be different depending on your device, browser and zoom level. That is why this tool detects your real screen resolution and viewport size live instead of making you guess from a list.
Free Online Screen Resolution Checker
This tool helps you instantly answer questions like what is my screen resolution, what is my screen size in pixels, what is my browser viewport, what is my aspect ratio and what wallpaper size should I use.
It is useful for wallpapers, image cropping, responsive design, CSS testing, UI previews, screenshots and general display checks. Unlike bloated detector pages, this one is lightweight, fast and private. Everything runs directly in your browser with no upload, no account and no waiting.
What this screen checker shows
- Your full screen resolution in pixels
- Your current browser viewport width and height
- Available screen area reported by the device
- Aspect ratio such as 16:9, 19.5:9, 21:9 or 4:3
- Orientation in portrait or landscape mode
- Device pixel ratio for high-density displays
- A suggested wallpaper size for your screen
Why screen resolution and viewport size are different
Many people search for their screen resolution and get confused when the browser shows smaller values. The reason is simple: screen resolution is the full size of the display, while viewport size is the visible browser area available to the page. Tabs, address bars, browser controls, system UI and resized windows can all reduce viewport size.
Useful for wallpaper fitting
If you want a wallpaper to fit your phone or monitor correctly, knowing the resolution and aspect ratio is the best starting point. This helps avoid poor crops, stretched images, black bars or wallpapers that zoom too much. Once you know your values, you can use HDPeek tools to fit, crop or adapt wallpapers more precisely.
Frequently Asked Questions
What is my screen resolution?
Your screen resolution is the total number of pixels your display can show horizontally and vertically, such as 1920 × 1080, 1366 × 768, 1080 × 2400 or 2560 × 1440.
What is the difference between screen size and screen resolution?
Screen size usually refers to the physical size of the display in inches, while screen resolution refers to the pixel dimensions. This tool checks the pixel-based values, not the physical inch measurement.
Why is the viewport smaller than the screen resolution?
The browser viewport is reduced by browser bars, tabs, window size, zoom level and operating system interface elements. On mobile devices, dynamic browser toolbars can also change viewport height.
What is device pixel ratio?
Device pixel ratio compares physical screen pixels with CSS pixels. A value like 2 means the display uses two physical pixels for every CSS pixel, which is common on many modern phones and sharp high-density displays.
What wallpaper size should I use?
A good starting point is your screen resolution itself, such as 1920 × 1080 for Full HD or 1080 × 2400 for many phones. After that, you can crop or adapt the image to your exact aspect ratio for a better fit.
Does this tool work on mobile, tablet and desktop?
Yes. This online screen resolution checker works on most modern browsers across phones, tablets, laptops and desktop computers.