Ratio & Resolution

The usual routine looks like this: open a calculator, type in width, height, ratio, something doesn't add up, start over. Ratio & Resolution skips that loop. Change any number and the on-screen rectangle redraws itself right away, across the full display. Not a result sitting in a text field — a shape you can actually see. HOW IT WORKS Three values are linked: width, height, and aspect ratio. Change one and the other two update on their own, no extra steps. Scaling is flexible, from 5% to 500%, either by dragging a slider or jumping straight to fixed points: 25, 50, 75, 100, 125, 150, 200, 400%. Rounding is consistent, so numbers don't drift between sessions. Need a specific resolution — 720p, 1080p, 1440p, 4K, 8K are all one tap away. A set of built-in formats is included: Cinema 2.39:1, Ultrawide 21:9, Widescreen 16:9, Classic 4:3, Square 1:1, Portrait 9:16. Custom ratios can be saved too, with rename, duplicate, and an undoable delete. The interface comes in light and dark, kept deliberately plain. It holds up equally well on a narrow 9:16 vertical screen and a wide 21:9 monitor. ON GOING OFFLINE The app never connects to the internet. No account gets created, no analytics get collected, no permissions are requested beyond what's strictly needed. Anything you enter stays on the device. WHO THIS IS FOR Anyone who deals with screen formats on a regular basis: designers laying out mockups, video editors handling crops and exports, streamers setting up overlays, developers checking layouts across resolutions. And anyone tired of googling what 16:9 comes out to at a width of 1920. No ads. No paid tier. No fine print.