Local display diagnostics

Screen Resolution Test

Check screen size, viewport size, device pixel ratio, and effective capture pixels before recording.

Inspect display and viewport size

Resize the browser window and see the dimensions a screen recording workflow may inherit.

Open the test in the browser and resize the window to inspect capture size.

effective viewport

Diagnostics run in this browser tab using local Web APIs. No files or device data are uploaded.

No. Screen resolution describes the display. Viewport size describes the browser content area available to the page.

High-density displays can produce more effective pixels than the CSS viewport size suggests, which can affect sharpness and export size.

The desktop app is better for long recording sessions, repeatable capture settings, and production workflows.