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Specifies the width, in pixels, of certain content elements.

Applies to [HTMLImgElement](/html/elements/img)
The **width** attribute specifies the visual width of [img](/html/elements/img), [iframe](/html/elements/iframe), [embed](/html/elements/embed), [object](/html/elements/object), [video](/html/elements/video), [canvas](/html/elements/canvas), and [input[type="image"]](/html/elements/input/type/image) in pixels.

By default, elements will not preserve aspect ratio when width attribute is set, without a height attribute. If a width attribute is set, but no height, an image will scale to preserve its original aspect ratio. If both the width and height are zero, the element should not be intended to be visible by the user.

Width values must be non-negative integers.


<img> with width attribute.

<img src="" height="100" width="150">

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<canvas> with width attribute

<canvas width="200" height="200"></canvas>

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Related specifications

HTML4 Specification
W3C Recommendation