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).

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

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ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
radiusChrome Full support YesEdge Full support 12Firefox Full support 4IE Full support YesOpera Full support 9Safari ? WebView Android Full support YesChrome Android Full support YesFirefox Android Full support 4Opera Android ? Safari iOS ? Samsung Internet Android Full support Yes


Full support  
Full support
Compatibility unknown  
Compatibility unknown