blur()

The blur() CSS function applies a Gaussian blur to the input image. Its result is a <filter-function>.

Try it

Syntax

blur(radius)

Parameters

radius: The radius of the blur, specified as a <length>. It defines the value of the standard deviation to the Gaussian function, i.e., how many pixels on the screen blend into each other; thus, a larger value will create more blur. A value of 0 leaves the input unchanged. The initial value for interpolation is 0.

Examples

Setting a blur with pixels and with rem

blur(0)        /* No effect */
blur(8px)      /* Blur with 8px radius */
blur(1.17rem)  /* Blur with 1.17rem radius */

Specifications

Specification
Filter Effects Module Level 1 # funcdef-filter-blur

Browser compatibility

BCD tables only load in the browser

See also

The other <filter-function> functions available to be used in values of the filter and backdrop-filter properties include: