PopularPrivate · Browser
Free Screen Resolution Checker
Check screen and viewport size.
See screen resolution, available area, browser viewport, device pixel ratio, color depth, and orientation. Updates live on resize.
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How to use Screen Resolution Checker
- Open the tool on any device.
- Read screen and viewport sizes.
- Resize the window to see live updates.
Features
- Screen + viewport
- Device pixel ratio
- Live resize
Why use this tool
- Read screen and viewport sizes including device pixel ratio.
- Verify responsive breakpoints on the device you are holding.
- Capture orientation details for layout debugging.
Common use cases
- Confirm CSS breakpoint behavior on a real phone
- Report exact viewport size in a design QA bug
- Check DPR when exporting assets for retina screens
What is Screen Resolution Checker?
Screen Resolution Checker is a free online tool on Free Quick Tools. Check screen and viewport size. Processing stays in your browser whenever this tool runs locally.
Privacy
Your files never leave your device. All processing happens in your browser.
Frequently Asked Questions
Why do screen and viewport differ?
Screen is the display; viewport is the browser layout area and shrinks with toolbars or split view.
Does zoom affect the numbers?
Browser zoom and OS scaling can change CSS pixels. Note zoom level when comparing devices.
Is data sent to a server?
No. Measurements are read from your browser APIs locally.
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