How to Crop an Image Online — Aspect Ratios for Every Platform
Cropping removes the edges of an image to change its dimensions or focus on a specific subject. Getting the aspect ratio right for your intended platform is crucial — an image uploaded at the wrong ratio appears with black bars, gets auto-cropped in unpredictable ways, or violates platform upload specifications.
Aspect Ratios for Every Major Platform
Instagram feed: 1:1 square (1080×1080) or 4:5 portrait (1080×1350) — portrait gets more feed real estate. Instagram Story and Reels: 9:16 (1080×1920). YouTube thumbnail: 16:9 (1280×720 minimum, 1920×1080 recommended). Twitter/X header: 3:1 (1500×500). LinkedIn post: 1.91:1 landscape (1200×627). Pinterest: 2:3 portrait (1000×1500) — tall images perform dramatically better than square.
Facebook cover photo: 16:9 (820×312 — very wide and shallow). Print (standard photo): 4:3. Print (A4/Letter): approximately √2:1 ratio (1:1.41). If in doubt, check the platform's media upload specifications page — they update dimensions occasionally.
- Instagram feed: 4:5 portrait maximises screen area and is the most-recommended format
- YouTube thumbnail: always exactly 16:9 — deviating causes black bars in the YouTube interface
- Pinterest: tall images (2:3 or taller) receive significantly more impressions than square or landscape
- LinkedIn: 1.91:1 landscape is the safe standard for link previews and post images
Composition: What to Keep When You Crop
The rule of thirds is the most useful compositional guide for cropping. Imagine your image divided into a 3×3 grid. Place your main subject at one of the four grid intersection points rather than dead centre. This creates a more dynamic, visually interesting result than a centred composition.
For headshots and profile images, keep the eyes approximately one third from the top of the frame. For product images, allow 5–10% breathing room on all sides so the product does not feel cramped. Avoid cropping at joints — cutting at the wrist, knee, or neck looks awkward and draws attention to the crop.
- Rule of thirds: place the subject at a grid intersection point, not dead centre
- Headshots: eyes should sit one-third from the top of the frame
- Products: 5–10% padding on all sides prevents the subject from feeling boxed in
- Avoid cropping at joints (wrists, knees, shoulders) — it looks unnatural
How to Crop an Image Using MediaFormatter
Go to the Crop Image tool, upload your image (JPG, PNG, WebP, or AVIF, up to 100 MB), select an aspect ratio (1:1, 4:5, 9:16, 16:9, or 4:3), and click Crop. The tool applies a centred crop at the selected ratio. The output is in the same format as the original.
For precise control over which part of the image is kept — particularly useful when your subject is off-centre — use an image editor like GIMP (free and open-source), Canva, or Figma, where you can drag the crop region to exactly the position you want.