Free Screen Resolution Checker
Check your monitor's screen dimensions, browser viewport size, and screen densities instantly. Resize this window to see real-time updates.
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Zoomix adds professional auto zoom, smooth layout transitions, custom canvas backgrounds, and cursor tracking effects to your recordings instantly.
Professional Grade Tool Specs
Quick view of viewport size, DPR, and orientation diagnostics.
Real-time Resolution & Viewport
See your screen resolution, viewport size, and device pixel ratio update instantly as you resize or change displays.
Detect Display Density (DPR)
Understand how Device Pixel Ratio affects rendering and how assets should be scaled for crisp visuals on high-density displays.
Orientation & Aspect Ratio
Quickly identify orientation (landscape/portrait) and common aspect ratios used for recording or streaming.
CSS Pixel vs Physical Pixel
Learn the difference between logical CSS pixels and physical monitor pixels, useful for layout debugging and screenshot capture sizing.
Cross-Device Diagnostics
Provides tips and checks for mobile, tablet, and desktop configurations so you can optimize your recordings across devices.
Privacy-First & In-Browser
All checks run locally in your browser — no data leaves your machine and no installs are required.
How to Use the Screen Resolution Checker
Open the Tool
Load the page and allow it to detect your current viewport and screen properties automatically.
Resize & Observe
Resize the browser window or change display settings to see live updates for viewport, DPR, and resolution.
Use Diagnostics
Follow the suggested tips for optimizing recording resolution, scaling assets, and ensuring layouts render correctly.
Frequently Asked Questions
Everything you need to know about screen resolutions.
Screen Resolution represents the total physical or logical pixel boundaries of your hardware monitor (e.g. 1920x1080). Viewport Size represents the actual active window workspace available inside your web browser. If your browser is maximized, the viewport width will equal the screen width, but viewport height will be smaller due to browser address bars and system taskbars.
Device Pixel Ratio is the ratio between physical pixels and logical pixels on a screen. High-density displays (such as Apple Retina or modern 4K monitors) use a DPR of 2.0x, 3.0x, or higher, scaling the interface to render text and graphical elements with crisp, anti-aliased sharpness.
When you adjust your browser zoom level, it modifies the scale of CSS pixels relative to physical pixels. Zooming in decreases the CSS viewport dimensions because elements take up more logical space, while zooming out increases the viewport resolution.
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