Screen Ruler

Capture or Upload: Use a screen capture, pasted image, or uploaded screenshot as the measuring surface.

Measure Objects: Draw ruler lines for distances or boxes for object width, height, and area.

Export Results: Download a marked PNG with your measurement overlays included.

Pixel Accurate: Rulers and coordinates are based on the source image pixels.

Real Units: Draw a reference line with a known size to convert later measurements to mm, cm, or inches.

Local Only: Screenshots and images stay on your device and are never uploaded.