How Do You Curve Corners in Illustrator?

You can curve corners in Adobe Illustrator using the Direct Selection tool and the Live Corners feature.

Curving Corners Using Live Corners

The easiest way to round corners in Illustrator is using the Live Corners feature. Here's how:

Select the Object: Use the Selection Tool (V) to select the shape you want to modify.
Switch to Direct Selection Tool: Select the Direct Selection Tool (A). This allows you to modify individual anchor points and corner properties.
Locate Live Corner Widgets: With the Direct Selection Tool, click on the shape. You should see small circular "Live Corner Widgets" (round handles) appear near each corner.
Drag the Widgets: Click and drag any of these Live Corner Widgets inwards towards the center of the shape. This will round the corresponding corner. The further you drag, the rounder the corner becomes.
Adjust Individual Corners: You can adjust each corner independently by selecting its specific Live Corner Widget and dragging. To select only one corner, click directly on its anchor point with the Direct Selection tool before dragging the widget.
Direct Corner Radius: If you want more control, you can also access the Corner options in the Control Panel (Window > Control) or the Properties Panel (Window > Properties) when an anchor point with a live corner is selected. Here, you can specify the exact corner radius value.

While the Live Corners feature is the most straightforward method, here are alternative ways to round corners in Illustrator:

Select the Object: Use the Selection Tool (V) to select the shape.
Apply Effect: Go to Effect > Stylize > Round Corners.
Set Radius: Enter the desired corner radius in the Round Corners dialog box and click OK.
*Important Note: This method is nondestructive, meaning the original shape is kept unchanged. To make it permanent, use Object > Expand Appearance.

These steps allow you to easily and precisely round the corners of your shapes in Adobe Illustrator.