Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Crop any image to a perfect square with a draggable crop box.
Position the crop box, then click Crop to see the result.
Many platforms -- profile photos, Instagram posts, product thumbnails -- require a perfect 1:1 square image, but most photos aren't naturally square. This tool lets you position and resize a square crop box over your image to select exactly which part becomes the final square.
Upload an image. A square crop box appears over it, constrained to always stay 1:1 -- drag it to reposition, and resize it using its handles to select more or less of the image. The preview shows exactly what the cropped result will look like. Download the cropped square image when you're satisfied.
The selected square region is drawn onto a new canvas sized to match, using the canvas drawImage method's source-rectangle parameters -- effectively "cutting out" only the pixels within your crop box and discarding everything outside it.
Preparing a profile photo for a platform that requires a square aspect ratio. Cropping a rectangular photo into a square for an Instagram post or square-format print. Creating consistent square thumbnails from a batch of differently-shaped source images.
Say you have a landscape photo that is 4000 by 3000 pixels. The largest possible square is 3000 by 3000, which uses the full height and trims 1000 pixels from the width. You can slide that box left or right to decide which part of the scene to keep, such as favoring a subject standing on the right third. If you shrink the box to 1500 by 1500 you get a tighter crop that zooms in on a detail, but the output will be 1500 pixels wide, half the resolution of the biggest option. Bigger boxes preserve more pixels and more of the scene, while smaller boxes act like a digital zoom.
Requirements differ by platform and change over time, so check the current guidelines of the site you are uploading to. In general, aim for a source square that is at least as large as the platform's display size, and preferably larger, since platforms often shrink or recompress uploads. If your square comes out smaller than needed, choose a higher-resolution source instead of enlarging the result, which only makes it blurry.
If you do not want to lose any of the picture, a square crop is not the answer. In that case, place the full image on a square canvas with padding instead, using an editor that supports background fill. This tool always discards whatever lies outside the box.
No -- this tool is specifically constrained to a 1:1 square crop, since that's the specific format it's built for; a general-purpose free-aspect cropper would be a different tool.
The cropped output only contains the pixels from within your selected square, so its resolution matches that portion of the original -- cropping a smaller region from a large photo still yields a reasonably sized square image as long as the source resolution was high enough.
The largest possible square uses the shorter side of your image in full. The only way to keep the whole picture is to add padding around it, which this tool does not do.
Usually yes, since it holds fewer pixels, though the exact size depends on the format and content.
The crop is done in your browser using the canvas, so your image is processed locally.