ScreenCheckv1.0
VISUAL INSPECTIONsharpness-geometry
1 min
Client-Side Local

Aspect Ratio & Scaling Verification

Renders perfect circles, squares, and standardized aspect-ratio bounding boxes (4:3, 16:9, 16:10, 21:9, 32:9). Easily detect if your GPU or monitor has incorrectly stretched a non-native resolution.

Technical Scope & Limitations

Detects aspect ratio scaling and stretching inside the browser viewport.

Browser rendering output can be influenced by OS display scaling, GPU driver color settings, and active HDR profiles.

Testing Instructions
  1. Enter fullscreen mode.
  2. Inspect the center circle: if it appears oval or squished, your display is stretching the image instead of preserving native aspect ratio.
  3. Check the reference boxes for 16:9, 16:10, and 21:9 to confirm native resolution mapping.
Interaction Controls
Next Pattern
→Space
Previous Pattern←
Exit FullscreenEsc
Mouse / TouchTap screen to cycle
Pattern 1 of 1: Aspect Ratio Verification Suite

What This Test Checks

  • Image proportion preservation: ensures perfect circles do not become ovals.
  • Standard aspect ratio bounds: 16:9, 16:10, 21:9 ultrawide.
  • GPU resolution stretching vs pillarboxing/letterboxing.

How to Perform the Test

  • Enter fullscreen mode.
  • Examine the center circle: it must measure exactly circular with equal horizontal and vertical diameters.
  • Examine the colored boundary rectangles corresponding to standard aspect ratios.

What to Look For

  • If the circle appears squished horizontally or vertically, your display is stretching pixels.
  • In your GPU control panel (NVIDIA / AMD / Intel), select "Preserve Aspect Ratio" or "No Scaling".

Common Display Problems & Diagnostic Guidance

4:3 Stretched on Widescreen

Older games or video feeds output at 4:3 (e.g. 1024x768) are frequently stretched horizontally across 16:9 screens, turning circles into flat ellipses.

Frequently Asked Questions

How do I ensure games do not stretch?

Open NVIDIA Control Panel, AMD Radeon Software, or Intel Graphics Command Center, navigate to Display Scaling, and set it to "Aspect Ratio" instead of "Full Screen".