A guide inside the browser canvas
Use the displayed grid to discuss broad screen composition or prepare a reference for a slide. A 3×3 division gives a center region and clear horizontal and vertical thirds.
The tool does not place a transparent overlay on your desktop, game, video player, or another browser tab. Its lines remain inside this page’s canvas and the exported image.
Match the ratio rather than the monitor size
Widescreen 16:9 describes the width-to-height relationship. It does not measure your display, set your monitor resolution, or guarantee a one-to-one match between preview pixels and physical screen pixels.
Resize the downloaded image proportionally in your destination application. Stretching only one direction changes the guide’s proportions. For a gridded screenshot, use a photo overlay page and select the screenshot as its source.