Cropping β changing the frame without losing quality
Cropping cuts part of a picture away. Unlike resizing, it does not touch a single pixel of what remains. A tool built properly has no reason to degrade an image while cropping it.
Cropping and resizing get confused, but they do different things. Resizing redraws every pixel onto a new grid, so shrinking introduces values that were not in the original. Cropping discards what you do not want and leaves the rest untouched.
This tool crops at the original resolution. The preview is scaled to fit the screen, but the cut happens on the full-size image, so a 4,000-pixel photograph produces a 4,000-pixel-scale result.
The file format is preserved
Many crop tools save the result as PNG. For a photograph that is the wrong choice: PNG is lossless, which sounds good, but on photographic content it produces a file several times larger. A 3MB photo coming back as 15MB is routine.
Here a JPEG comes back as a JPEG and a PNG as a PNG. Cropping does not change pixel values, so there is nothing to gain from switching format.
One caveat: JPEG loses a little on every save. A single crop is invisible, but cropping, re-uploading and cropping again accumulates artefacts around edges. Keep the original if you plan several passes.
Common ratios
Choosing a preset locks the ratio so you only move the frame.
| Where it goes | Ratio |
|---|---|
| Instagram post (square) | 1:1 |
| Instagram post (tallest allowed) | 4:5 |
| Instagram profile grid | 3:4 |
| YouTube thumbnail | 16:9 |
| Shorts, Reels, TikTok | 9:16 |
| Standard photograph (DSLR) | 3:2 |
| Older cameras and tablets | 4:3 |
The Instagram grid is no longer square
For years the profile grid showed square tiles, which made square posts the safe choice. The tiles are now 3:4 β taller than they are wide.
A square post is therefore trimmed top and bottom in the grid. A 4:5 post, by contrast, fills the feed at maximum height and survives the grid nearly intact. If faces or text sit near the edges, the difference is very visible.
Check the resolution you are left with
Cropping throws pixels away, so the result is always smaller than the original. On screen it is hard to tell by how much, and the number matters as soon as the image is going to print or onto a large display.
Take a 4,000Γ3,000 photograph. Cropped to 16:9 across the full width it becomes 4,000Γ2,250 β only 750 pixels of height gone. Crop instead to the middle third to isolate one person and you are left with 1,333Γ1,000, which looks fine on screen and is not enough for an A4 print.
The tool shows the pixel size of the selected area as you move it. If the destination is print, decide from that number.
Composing the crop
- β’Placing the subject a third of the way in, rather than dead centre, usually reads better.
- β’Leave space in the direction a person is facing; a gaze running into the frame edge feels cramped.
- β’Do not cut at a joint β knees, elbows. Above or below the joint looks natural.
- β’Cropping improves a good photograph. It does not rescue one that is out of focus.
- β’Cropping reduces the pixel count. Check the resulting size if the image is going to print.
Frequently asked questions
Does cropping reduce quality?
The remaining pixels are unchanged. A JPEG loses a very small amount when re-saved, and the total pixel count falls by whatever you cut away.
Can I crop to an exact pixel size?
This tool works by ratio. For exact dimensions, crop first and then resize β doing it the other way round redraws the image twice.
Can I crop several images at once?
One at a time. To put a batch through the same ratio, the social media resizer is the better fit.
Is my photo uploaded?
No. Everything happens in your browser and the file is never sent anywhere.