Square Image

Rounded Corners

Round the corners of a photo, logo or screenshot and download it with the cut-out left transparent. Choose the radius, pick PNG, WebP or JPEG, and save. The image is processed in this browser and is never uploaded.

What this tool does

It masks an image to a rounded rectangle. Everything inside the shape is kept at the original resolution; the four corners are erased rather than filled, so a PNG or WebP export drops straight onto a coloured background, a card, or a dark interface without a visible white triangle at each corner.

What you need

One image in a format your browser can decode, which in practice means JPEG, PNG, WebP, GIF or BMP. There is no size limit beyond what your device can hold in memory. An animated GIF is treated as its first frame.

How to round the corners of an image

  • Add the image. Click the box, drag a file onto the page, or paste from the clipboard.
  • Set the radius. Drag the slider and watch the live preview. The checkerboard behind it is the transparent area.
  • Pick a format. PNG or WebP to keep transparency, JPEG if the file must be small and will sit on white anyway.
  • Download. The saved file has the same pixel dimensions as the original.

What the result is good for

App icons and favicons, avatars that a platform will not round for you, thumbnails in a card layout, screenshots in documentation, and product shots that need to match a rounded design system. A 100% radius on a square image gives you a circular avatar with a transparent surround.

When the result will disappoint you

  • You export as JPEG. The corners come back as white blocks. This is a limitation of the format, not the tool.
  • The subject touches the edge. A large radius eats into the picture. Give the subject some margin, or square the image first so there is room to lose.
  • The destination rounds it again. Some platforms apply their own mask. Rounding twice leaves a thin ragged edge; upload the unrounded original in that case.
  • You need a border or shadow. This tool only masks. Add the stroke afterwards in a design tool, or the anti-aliased edge will be clipped.

How this differs from the other tools here

Rounding changes the corners but not the aspect ratio. If the image also has to become a square, run it through the square image converter first and round the result. If you want the whole photo visible inside a square profile picture, the Full DP maker is the closer fit, and Square Crop is for choosing which part of a photo survives a 1:1 crop.

Frequently asked questions

Which format keeps the rounded corners transparent?

PNG and WebP. Both store an alpha channel, so the four corners stay see-through and the image sits on any background. JPEG has no alpha, so the corners are filled with white on export.

What radius should I use?

The slider is a share of the shorter edge, not a pixel value, so the same setting looks right on any size. 8-16% reads as a soft app-icon corner. 100% turns a square into a circle and a rectangle into a pill.

Can I round only some corners?

No. This tool applies one radius to all four corners, which is what icons, avatars and card thumbnails need. For per-corner control you need an image editor with a vector mask.

Does rounding reduce the image quality?

The pixels inside the rounded shape are untouched. Only the corners are erased. Exporting as JPEG re-compresses the whole picture, so choose PNG or WebP if you plan to edit the file again.

Are my images uploaded anywhere?

No. The rounding is a canvas operation in your own browser. Closing the tab discards the image.

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