Question 1

What does the rounded corners tool do?

Accepted Answer

The rounded corners tool applies a circular or elliptical clipping mask to the corners of your image. The result has smooth, curved corners instead of sharp 90-degree angles. The rounded area is made transparent and saved as PNG to preserve the effect.

Question 2

Why must the output be PNG and not JPEG?

Accepted Answer

Rounded corners create transparent areas in the corner regions. JPEG does not support transparency, so those areas would be filled with white or black. Only PNG (and WebP) support transparency, making them the correct format for images with rounded corners.

Question 3

Can I control the radius of the rounding?

Accepted Answer

Yes. The tool provides a corner radius slider or input, typically measured in pixels. A small radius (e.g., 10–20px) creates gently curved corners, while a large radius (e.g., 50% of the shorter dimension) creates a fully oval shape. Some tools also support different radii per corner.

Question 4

Will the rounding change the image dimensions?

Accepted Answer

No. The canvas dimensions remain the same — only the corner pixels become transparent. The width and height of the exported PNG are identical to the original, but the corners are clear instead of filled with image content.

Question 5

Can I apply rounded corners to photos with transparent backgrounds?

Accepted Answer

Yes. If your input is a PNG with an existing transparent background, the rounded corner masking will be combined with the existing transparency. The result preserves all existing transparency while also rounding the image corners.

Image Rounded Corners

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