How to Crop Images Online for Free — Exact Pixels, Aspect Ratios, and Portrait/Landscape

Go to Optimage Crop, upload your image, drag the crop handles to your desired area or type in exact pixel coordinates, and download. The tool supports all common aspect ratios, freehand selection, and exact pixel cropping — all free, no account required, processed in seconds.

Crop vs Resize — The Difference That Matters

Cropping and resizing are confused more than any other two image operations, and the confusion causes real problems: images that look stretched, compositions that get ruined, and platform uploads that reject the wrong dimensions.

Resizing changes the overall dimensions of the image — every pixel stays in the picture, just scaled. A 1200×900px image resized to 800×600px keeps the same framing but at a smaller scale.

Cropping cuts away part of the image entirely. A 1200×900px image cropped to 800×800px keeps the original pixel scale but removes content from the edges — the remaining area is not scaled at all.

When you need a square image from a landscape photo, you crop — cutting from both sides to get a 1:1 ratio. If you resize instead, you get a distorted, squashed image. This is the most common mistake people make preparing photos for social media.

Aspect Ratios: When to Use Which

1:1 (Square) Use for Instagram feed posts, profile photos across most platforms, and product thumbnails. Square crops force a compositional decision — what's the most important part of this image? That discipline usually improves the photo.

4:5 (Portrait) Instagram's recommended format for feed posts. Taller than wide, it takes up more screen space in the feed, which means more attention. Great for portraits shot in landscape mode that need to be flipped.

16:9 (Landscape) YouTube thumbnails, video screenshots, website banner images, and presentation slides. The universal widescreen format. If your source is a 3:2 DSLR photo, a 16:9 crop removes roughly 25% of the height.

9:16 (Vertical/Story) Instagram Stories, TikTok, YouTube Shorts, Facebook Stories. Full vertical mobile screen. If you're cropping a landscape photo to 9:16, expect to lose most of the width.

3:2 (Classic photo) Standard DSLR and mirrorless camera output ratio. Matches a 6×4-inch print exactly. Most photographers keep this for prints and exports that aren't going to social.

4:3 Older point-and-shoot cameras and video (SD). iPad screen ratio. Useful for tablet-optimised graphics.

Cropping to Exact Pixels — Passport Photos and Print Specs

Some use cases require exact pixel dimensions, not just an aspect ratio.

Passport photo (ICAO standard): 35×45mm at 300 DPI = 413×531px. Optimage's crop tool lets you enter these values directly and position the face in the frame.

US visa photo: 2×2 inches at 300 DPI = 600×600px (square).

LinkedIn profile photo: Displayed at 400×400px. Upload at least 400×400px; LinkedIn will also show it at smaller sizes as a thumbnail.

YouTube thumbnail: 1280×720px (16:9). Crop your source image to 1280×720 rather than stretching — text and faces in thumbnails look noticeably worse when distorted.

Shopify product image: Shopify displays products in a 1:1 square by default. Crop all product photos to the same square ratio before upload to maintain visual consistency across your store grid.

When to Crop vs When to Resize vs When to Do Both

Here is a decision framework:

• Composition problem (wrong part of the image is visible) — crop
• Scale problem (image is too large or too small in pixels) — resize
• Platform spec problem (needs exact dimensions in a ratio you don't have) — crop first, then resize if needed
• File size problem (image is too heavy) — compress, or resize if the pixel count is excessive
• Both composition and scale problems — crop to the right ratio, then resize to the target pixel count

For most social media preparation, the workflow is: crop to the platform's required ratio → resize to the required pixel dimensions → compress for upload speed.

Cropping for LinkedIn Profile and Cover Photos

LinkedIn has specific display requirements that catch people out.

Profile photo: Displayed as a circle, but stored as a square. Upload at least 400×400px. LinkedIn's cropping interface lets you zoom and reposition, but if your source is a rectangle, it will attempt to fill the square by zooming in. Crop to 1:1 in Optimage first, then upload — you get full control over what ends up in the frame.

Cover photo (banner): 1584×396px (4:1 ratio). Most people upload a landscape photo that LinkedIn then crops and zooms unpredictably. Crop to exactly 4:1 before upload.

Post images: 1200×627px is the LinkedIn recommended size (approximately 2:1). Images outside this ratio get letterboxed with white bars.

Frequently Asked Questions

What is the difference between crop and resize?

Cropping removes part of the image, changing its dimensions by cutting away the edges. Resizing scales the entire image up or down without removing any content. Use crop when you need to change composition or achieve a specific aspect ratio. Use resize when you need different pixel dimensions while keeping the same framing.

How do I crop to exact pixels?

In Optimage Crop, switch from the aspect ratio picker to the pixel input mode. Enter your target width and height in pixels, position the crop box over the area you want to keep, and apply. The output will be exactly those pixel dimensions.

How do I make a square crop?

Select the 1:1 aspect ratio in Optimage's crop tool. The crop selection will be constrained to a perfect square regardless of how you drag it. Position it over the main subject and download.

What is the best aspect ratio for a LinkedIn profile photo?

Upload a 1:1 square crop of your headshot. LinkedIn displays profile photos as circles, and a square ensures you control which part of the image shows. Minimum size is 400×400px; 800×800px is recommended for sharp display on high-DPI screens.