Image Crop Ratios For Common Platforms: Avatars, Covers, Vertical Posts and More

Every time I need to post an image, I pause and search for the right size again.

Is this cover 16:9? Should the vertical post be 3:4 or 4:5? Is the avatar square? I never remember, and search results often disagree.

So I made myself a quick list of the ratios I actually use. The tool I use is DocCrunch Image Crop: free, no login, and cropping runs locally in the browser without uploading the image to a server.

Here is the cheat sheet.

Common Image Crop Ratios

Use case	Recommended ratio	Good for
Avatars, square grids and square posts	1:1	Profile photos, social grids, square product shots
Video covers and horizontal thumbnails	16:9	YouTube, Bilibili, video covers, wide slide backgrounds
Vertical social posts	3:4	RedNote or mobile-first vertical images
Taller feed images	4:5	Social feed covers that need more screen presence
Traditional horizontal images	4:3	Camera images, document illustrations, older photo layouts
Classic photo ratio	3:2	DSLR-style photos and portfolio images

Avatars and Square Grids: Use 1:1

Profile photos, square social posts and grid layouts usually work best at 1:1. Choose the square ratio first, then frame the face or main subject.

Do not place the subject too close to the edge. Some platforms show avatars inside a circle, and the edge may be cropped again.

Video Covers and Horizontal Images: Use 16:9

Video covers and wide thumbnails often work well at 16:9. It is also a convenient ratio for full-width slide backgrounds.

For horizontal covers, keep key faces, text and product details away from the extreme left and right edges.

Vertical Posts: Use 3:4 or 4:5

For mobile-first platforms, vertical images usually perform better visually. 3:4 is a balanced choice. 4:5 gives the image more screen space in a feed.

The taller the crop, the easier it is to cut off details. Keep people, products and text away from the top and bottom edges.

Classic Photos: Use 4:3 or 3:2

4:3 still appears in many camera images and document illustrations. 3:2 is a classic photography ratio often used for portfolio-style images.

If you are unsure, start with the direction: 16:9 or 4:3 for horizontal images, 3:4 or 4:5 for vertical images, and 1:1 for square images.

My Cropping Workflow

First decide where the image will be posted: square, horizontal or vertical. Then open Image Crop and choose the matching ratio.

Once the ratio is locked, the crop box keeps its shape. You only move and scale the box until the important part is inside the frame.

Download when it looks right. JPG, PNG and WebP are supported. If you need exact output dimensions, continue with Image Resize. If the file is too large, run it through Image Compress.

Small Lessons I Learned

• Pick the platform before cropping, not after.
• Leave safe space around faces, products and text.
• Keep cover text away from the edges.
• For sensitive images, prefer a local browser tool instead of uploading to an unknown server.

Cropping is a tiny task, but doing it badly over and over wastes attention. Save the ratios, use a tool that remembers the workflow, and it becomes almost automatic.