CSS max-width

The CSS max-width property is used to constrain the width of an element. The element can render at any size up to the max-width, depending on its contents.

Syntax

Possible Values

none

Specifies that there's no limit on the width of the box.

length

Specifies a maximum value for width as a length value (for example 300px). Negative values are illegal.

percentage

Specifies a maximum value for width as a percentage of the width of the containing block. Negative values are illegal. If the containing block's width is negative, the used value is zero.

min-content

The intrinsic minimum width of the content.

max-content

The intrinsic preferred width of the content.

fit-content(length-percentage)

Uses the fit-content formula with the available space replaced by the specified argument.

stretch

Expands the element's width to fill the available space of its containing block.

In addition, all CSS properties also accept the following CSS-wide keyword values as the sole component of their property value:

initial

Represents the value specified as the property's initial value.

inherit

Represents the computed value of the property on the element's parent.

unset

This value acts as either inherit or initial, depending on whether the property is inherited or not. In other words, it sets all properties to their parent value if they are inheritable or to their initial value if not inheritable.

General Information

Example Code

Here are some examples of valid max-width values:

Official Specifications

• CSS Box Sizing Module Level 3 (W3C Editor's Draft)
• CSS Level 2.1 (W3C Recommendation 07 June 2011)