The radius attribute represents the radius (or radii) for the operation on a given <feMorphology> filter primitive.

If two numbers are provided, the first number represents the x-radius and the second one the y-radius. If one number is provided, then that value is used for both x and y. The values are in the coordinate system established by the primitiveUnits attribute on the <filter> element.

A negative or zero value disables the effect of the given filter primitive (i.e., the result is the filter input image).

You can use this attribute with the following SVG elements:

Usage notes

Value <number-optional-number>
Default value 0
Animatable Yes


Specification Status Comment
Filter Effects Module Level 1
The definition of 'radius' in that specification.
Working Draft No change
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'radius' in that specification.
Recommendation Initial definition

Browser compatibility

BCD tables only load in the browser