image tool

Round image corners online

Set a corner radius and the four corners of the image are cut into smooth curves, with the area outside them made transparent. Switch to Circle and the tool cuts the largest circle the picture holds, with a slider to choose which part of a wide or tall photo it keeps.

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How it works

  1. 1

    Drop the image

    The corners are rounded at 12% of the shorter side to start, and a checkered pattern shows where the result is transparent.

  2. 2

    Set the radius or pick Circle

    Drag the radius slider for rounded corners. Press Circle for a round cut, which turns a photo into a square file with a circle in it.

  3. 3

    Choose the part to keep

    For a circle from a wide or tall photo, slide Which part of the picture until the face or subject sits in the middle.

  4. 4

    Download the PNG

    The full-size image is cut and saved as PNG with rounded added to its name. Nothing is uploaded and nothing is stored, ever.

Why the result is always PNG

Rounding a corner means the pixels outside the curve have to become see-through, so the shape shows the page or slide behind it. PNG stores an alpha channel for exactly that. JPG has no alpha channel at all: any tool that saves a rounded JPG has to fill the corners with a colour, usually white, which looks right on a white page and wrong everywhere else. So this tool saves PNG whatever came in, and says so when the source was a JPG or WebP. The cost is size: a photo stored without JPG's compression is often three to five times larger.

Rounded corners or a full circle

Rounded corners keep the whole picture and soften its edges, which suits screenshots, product shots and cards in an app style layout. A small radius, 3 to 6% of the shorter side, looks like a modern interface; 15 to 25% looks deliberately soft. A circle is for people: profile photos, team pages and speaker lists, where a ring of faces reads as a group of equals. The circle is cut from the middle of the shorter side, and the position slider moves it along the longer side so a face that is off centre still ends up in the middle.

Getting a clean circle from a portrait

Crop first if the face is small in the frame. The circle is as wide as the photo's shorter side, so on a full length photo the face would be a dot near the top. Cut the photo down to head and shoulders with the image cropper, then come back for the circle. Leave a little space above the head; a circle that clips the hair looks cramped at small sizes, such as a 64 pixel avatar.

Limits worth knowing

JPG cannot hold transparency, so the output is always PNG, even when the input was a JPG. Corners are rounded equally; there is no per corner control. The circle size is fixed to the shorter side and the curve is drawn with the browser's anti-aliasing, so the edge is smooth rather than stepped. Images over 8,192 pixels on the long side are refused with a plain message instead of crashing the tab.

Circle photos on a profile slide

The slide builder's profile role has 9 layouts of its own, and every slide image slot can set its corner radius to Square, 16, 32 or Full, where Full gives a circle. If the photo is going onto a slide, you can upload it as is and pick Full there. Cut the circle here when the image is headed somewhere without that setting, such as an email signature or a document.

Limits

  • JPG cannot hold transparency, so the output is always PNG, and a JPG photo saved this way is usually several times larger.
  • The corner radius is a share of the shorter side, from 0 to 50%. At 50% a square becomes a circle and a rectangle becomes a pill.
  • The circle is always as wide as the shorter side; to make it smaller, crop the photo first.
  • Images larger than 8,192 pixels on the long side are refused with a message.

What it does not do

  • It does not round each corner by a different amount.
  • It does not add a border or shadow around the shape; the border tool does a frame.
  • It does not keep EXIF data.

Questions people ask

How do I cut a circle profile photo from a rectangular picture?

Drop the photo, press Circle, and slide Which part of the picture until the face is centred. Download the PNG. The file is square with a transparent area outside the circle, which is what profile picture slots expect. If the face is small in the frame, crop to head and shoulders first, so the circle is filled by the face rather than the background.

Can I get rounded corners as a JPG?

Not from this tool, because a JPG cannot store the transparent pixels outside the curve. If the image will always sit on one plain background, you can save the PNG here, then use the image converter with that background colour as the fill, which gives a JPG whose corners match the page colour exactly.

What radius do apps and websites use?

There is no standard. Interfaces tend to use small radii, around 8 to 16 pixels on a card a few hundred pixels wide, which is roughly 3 to 6% of the shorter side. Social media avatars are usually full circles. Match whatever the destination uses for its other images so the photo does not look pasted in.

Why does the circle crop out part of my photo?

A circle fits inside a square, so on any photo that is not square the longer side has to lose some of its length. The tool keeps the largest circle that fits, as wide as the shorter side, and the position slider chooses which part of the longer side survives. Nothing is stretched; the kept area is at its original resolution.

Are the curved edges smooth or jagged?

Smooth. The browser anti-aliases the curve, so pixels on the edge are partly transparent and blend into whatever is behind the image. That is another reason the output is PNG: those soft edge pixels need an alpha channel, and without one they would turn into a hard, stepped outline against the fill colour.

Use circle photos on a team slide

Take what you made here into presentations.

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More tools like this

Background reading: the question page on this.

Sources

Written and checked by the OneCraft team. Last checked .