About AspectRatio

AspectRatio is a collection of free, browser-based aspect ratio tools: identify the ratio of any width and height, simplify a ratio to its lowest terms, compare two ratios, and plan exact crops for photos, video, screens and print.

Every calculation runs locally in your browser - your numbers, images and files are never uploaded, stored or transmitted. There is no sign-up and no watermark.

Alongside the tools you will find practical guides: what aspect ratio means, the reference table of common ratios, platform size guides for YouTube, Instagram and TikTok, and how to change a ratio without ruining the picture.