CSS max-height

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

Syntax

Possible Values

length
Specifies a maximum value for height as a length value (for example 300px). Negative values are illegal.
percentage
Specifies a maximum value for height as a percentage of the height of the containing block. Negative values are illegal. If the containing block's height is negative, the used value is zero.
available
Equal to the containing block height minus the current element's margin, border, and padding.
min-content
The min-content height.
max-content
The max-content height.
fit-content
Same as max-content.
none
Specifies that there's no limit on the height of the box.

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

Initial Value
none
Applies To
All elements except non-replaced inline elements, table columns, and column groups
Inherited?
No
Media
Visual
Animatable
Yes (see example)

Example Code

Here are some examples of valid max-height values:

Official Specifications