Round Image Corners Online - Free Batch PNG Tool

How the radius is measured

The radius starts at 30 px with all four corners switched on. In px mode the number is used as it is, so 30 px is the same curve on a small avatar and on a large screenshot. That is what you want when you are matching a fixed design value at a known display size.

In % mode the radius is a share of the shorter side of the finished image, padding included. A 10% radius on a 1200 x 800 image gives an 80 px curve; on a 600 x 400 thumbnail it gives 40 px. Because the corner scales with the picture, a batch of mixed sizes keeps the same look.

There is a ceiling: the radius never exceeds half the shorter side. Any percentage above 50%, or a px value larger than half the shorter side, produces the same result as the maximum. On a square image that maximum is a circle; on a rectangle it is a pill with fully rounded short ends, not an oval. If you want a round avatar, crop the photo to a square before loading it.

Rounding only some corners

The four corner buttons next to the padding field turn each corner on or off; a highlighted button means that corner is rounded. Rounding only the top two corners suits an image that sits at the top of a card or a blog preview, where the bottom edge meets text. Rounding only the bottom two fits the opposite layout, and a single rounded corner can echo a tab or a speech bubble.

With all four corners switched off, no curve is applied at all. Combined with padding and a background color, that turns the tool into a quick way to add an even, plain border around a batch of screenshots.

How padding and background interact

Padding adds the same number of pixels to every side, so the output grows by twice the padding in each direction. The panel beside the preview shows both sizes, for example 1200 x 800px -> 1240 x 840px with 20 px of padding, which is an easy way to check what you are about to download.

The curve is cut along the outer edge of the whole canvas, not along the edge of your photo. With the default transparent background this matters: the padding is empty space, and once it reaches roughly 30% of the radius, the photo's own corners are not trimmed at all. At the default 30 px radius that happens from 9 px of padding. The radius has to be more than about three and a half times the padding before the photo gets any rounding, so go well beyond that if you want a clearly rounded result.

A white, black, or custom background fills the entire canvas, including the area outside the curve, so the file has no transparent pixels and the corners simply show that color. Use it when you know what the image will sit on, such as a white document page or a dark slide, or when the place you upload to shows transparent areas in an unexpected color.

What you get when you download

Every result is saved as PNG whatever the input format, and the file name gets a -rounded suffix, so holiday.jpg becomes holiday-rounded.png. Once at least two images are finished, a Download All button appears and packs them into shotedit-rounded-images.zip; if two files share a name, (1) is added to one of them so nothing is overwritten.

PNG is lossless, which keeps the curve clean but often makes a rounded JPG photo larger than the original. If size matters, run the result through the image compressor, or use the image converter to make a WebP, which keeps the transparent corners in a smaller file. You can convert to JPG too, but JPG has no transparency, so the converter fills the corners with white.

Apart from padding, nothing is resized: the output has the same pixel dimensions as the input. If the final image will be small, resize it first with the image resizer and then round it, so a px radius matches what people will actually see. Animated GIFs come out as a single still frame, and metadata such as EXIF is not copied into the new file.

Working through a batch

One set of settings applies to every image in the list. Changing the radius, unit, padding, corners, or background re-renders the whole batch, so you can adjust while watching the selected preview and the other files follow.

Besides the Add Images button, you can drag files onto the drop area or paste an image from the clipboard. Ctrl+S (Cmd+S on a Mac) downloads the selected result, and Ctrl+C copies it as a PNG ready to paste into a chat or a design tool. Add Folder only appears in browsers that support folder access, such as Chrome and Edge.

Accepted inputs are JPG, PNG, GIF, BMP, and WebP. Other files, such as HEIC photos from an iPhone, are ignored, and if nothing in your selection is supported you will see a "No supported image files found" warning. Convert HEIC photos with the HEIC to JPG tool first, then bring the JPG back here.