Crop any image to a fixed aspect ratio — square, portrait, landscape or widescreen. Pick a preset and the frame keeps that exact shape while you position it.
Drop an image to crop by ratio
Drag & drop an image here, or choose a file. Supports PNG, JPG, WebP and GIF (first frame).
Max recommended size ~25 MP. Nothing leaves your device.
Recent crops (saved on this device)
Different platforms want different shapes, and getting the ratio wrong means your image is stretched or auto-cropped on upload. Choose the preset you need — 1:1 for avatars and grid posts, 4:5 for portrait feed posts, 16:9 for video thumbnails and covers, 9:16 for stories and reels, 3:2 for classic photo prints — and the crop frame locks to that exact shape. Drag and resize freely; the proportions never drift. Switch to Circle for a round result, or Free to crop without any constraint.
A ratio fixes the shape; sometimes you also need specific pixels. With a ratio selected, type one dimension and the other follows automatically — so a 16:9 crop at 1280 wide becomes 1280×720 without arithmetic. Export PNG to keep transparency, JPG for the smallest photo file, or WebP for a web-ready balance. This pairs well with crop by size when the pixel count matters as much as the shape.
This is the page to crop by ratio when the shape matters more than the exact pixels. Pick the proportion your destination expects and crop confidently, knowing the frame will not drift. Common pairings: 1:1 for avatars, 4:5 for portrait posts, 16:9 for video and 9:16 for vertical. Need a platform’s exact size as well? The scenario pages — YouTube thumbnail and Instagram post — preset both the ratio and the recommended pixels.
A quick map of the presets: 1:1 square for avatars, icons and grid posts; 4:5 portrait for feed posts that take more vertical space; 5:4 and 3:2 for classic photo prints and DSLR shots; 2:3 for tall posters and Pinterest pins; 16:9 widescreen for video thumbnails, covers and slides; 9:16 vertical for stories, reels and TikTok. Landscape ratios suit scenery and group shots; portrait ratios flatter single subjects and phone screens. If you are unsure, 1:1 is the most universally safe. Lock the one you need and the crop frame holds that shape exactly while you position it, then export at full resolution or a size you type. When a destination also has a required pixel size, the scenario pages — for example the Instagram, TikTok and Pinterest croppers — set both ratio and size for you.
The Aspect Ratio Cropper is free to use, with no watermark, no account and no upload. The whole tool runs in your browser on the HTML canvas, which means your images are processed on your own device and never sent anywhere — it is fast, completely private, and keeps working offline once the page has loaded. It behaves the same on Windows, macOS, Android and iPhone, with a crop box you can drag with a mouse or your finger, and you can crop as many images as you like in one sitting without reloading. Export to PNG or WebP to preserve transparency, or JPG when you want the smallest possible photo file. The crop frame is locked to the right shape, so every result is consistent without manual measuring.
Drop it in. A ratio is preselected; change it any time.
Pick 1:1, 4:5, 16:9, 9:16, 3:2 or another preset. The frame locks to it.
Export at the size you want in PNG, JPG or WebP.
1:1, 4:5, 5:4, 3:2, 2:3, 16:9 and 9:16 presets, plus Free (no constraint) and Circle.
1:1 for avatars and grid posts, 4:5 for portrait posts, 16:9 for video covers, 9:16 for stories/reels, 3:2 for photo prints.
Yes. With a ratio locked, enter one dimension and the other is calculated to match.
No. The crop is cut at full resolution; the ratio only fixes the shape.
No. Cropping happens in your browser; nothing is uploaded.