Ratio & Resolution

Ratio & Resolution lets you see how screen proportions change in real time. Adjust the width, height, or aspect ratio, and the rectangle updates instantly. No repeated calculations, no guesswork.
• Change width, height, or aspect ratio — the other values update automatically.
• Scale from 5% to 500% with a slider or quick presets.
• Switch to 720p, 1080p, 1440p, 4K, or 8K in one tap.
• Use common aspect ratios: 16:9, 21:9, 4:3, 1:1, 9:16, and Cinema 2.39:1.
• Save your own ratios, rename or duplicate them, and undo deletions.
• Choose between light and dark themes.
The app works entirely offline. No accounts, ads, analytics, or unnecessary permissions. Your data stays on your device.
Whether you're working on a video, designing a layout, setting up a stream, or just checking what 1920 × 1080 looks like, everything is right there on screen.
No subscriptions. No hidden costs. Just a tool that does its job.