stdDeviation

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The stdDeviation attribute defines the standard deviation for the blur operation.

You can use this attribute with the following SVG elements:

Example

html
<svg viewBox="0 0 480 200" xmlns="http://www.w3.org/2000/svg">
  <filter id="gaussianBlur1">
    <feGaussianBlur stdDeviation="1" />
  </filter>
  <filter id="gaussianBlur2">
    <feGaussianBlur stdDeviation="5" />
  </filter>
  <filter id="gaussianBlur3" x="-30%" y="-30%" width="160%" height="160%">
    <feGaussianBlur stdDeviation="10" />
  </filter>

  <circle cx="100" cy="100" r="50" style="filter: url(#gaussianBlur1);" />
  <circle
    cx="100"
    cy="100"
    r="50"
    style="filter: url(#gaussianBlur2); transform: translateX(140px);" />
  <circle
    cx="100"
    cy="100"
    r="50"
    style="filter: url(#gaussianBlur3); transform: translateX(280px);" />
</svg>

Usage notes

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

If two numbers are provided, the first number represents a standard deviation value along the x-axis. The second value represents a standard deviation along the y-axis. If one number is provided, then that value is used for both X and Y.

A negative value is forbidden. A value of zero disables the effect of the given filter primitive (i.e., the result is the filter input image). If stdDeviation is 0 in only one of X or Y, then the effect is that the blur is only applied in the direction that has a non-zero value.

Specifications

Specification
Filter Effects Module Level 1
# element-attrdef-fegaussianblur-stddeviation

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
stdDeviation

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Full support
Full support