Why did my circle turn back into a rectangle?

Picking JPEG or WebP as the output format drops you out of circle mode, because neither round-trips the transparent surround the mask leaves behind, JPEG has no alpha channel at all. Switch the format back to PNG and re-select the circle shape.

How small can the crop box get?

Sixteen pixels. The box will not go under that on either side, however far you drag inward.

Crop Image

No upload · runs in your browser

Drop an image to cropJPG, PNG, WebP, GIF or AVIF, it stays on your deviceSelect image No upload · processed locally · auto-deleted

Runs entirely in your browser, nothing is uploaded.

How it works

Crop Image to a Ratio or a Circle Avatar

Drag a box over a JPG, PNG, WebP or GIF, snap it to 1:1, 4:3, 16:9 or 3:2, then cut a circle with a transparent surround.

What this does

Drag the box, grab one of eight handles, or type exact X, Y, width and height in pixels
Ratio presets of 1:1, 4:3, 16:9 and 3:2, re-fitted around the current centre when you switch
Circle mode locks the selection square and writes PNG, so the surround keeps its alpha
Quality slider from 40% to 100% for JPEG and WebP; PNG is always written losslessly
The picture is decoded and cut on a canvas in this tab, so it never reaches a server

FAQ

The cut itself does not. The selected region is copied at 1:1, the source rectangle and the destination rectangle are the same size, so no pixel is resampled. The re-encode is where quality goes: saving a JPEG source back to JPEG runs it through lossy compression a second time, and the quality slider starts at 92%. Keep the output as PNG if the file is going back into an editor.

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