Web tools
HTML editor
Edit markup with a sandboxed live preview.
Free · Browser-basedWEB TOOLS
Screen & window size
Inspect your screen, viewport and device pixel ratio.
ON YOUR DEVICE
Files and tool inputs are processed on your device. Media access starts only after your action and browser permission.
Reading screen size…
One less thing on your list.
- 01
Enter a public URL or select the measurement controls.
- 02
Run the checker, open the preview, or inspect your display measurements.
- 03
Read the results and the tool-specific browser limitations.
About this tool
Inspect your screen, viewport and device pixel ratio. Provides practical web inspection and display utilities with explicit actions before any external URL is requested.
Sites can block embedding or HEAD requests. Screen values are CSS pixels; physical ruler measurements require calibration.
A couple of useful answers.
How do I use screen & window size?+
Enter a public URL or select the measurement controls. Run the checker, open the preview, or inspect your display measurements. Read the results and the tool-specific browser limitations.
What happens to my input?+
Files and tool inputs are processed on your device. Media access starts only after your action and browser permission.
Files and tool inputs are processed on your device. Media access starts only after your action and browser permission.
Privacy details