The CSS align-items property aligns flex items of the current flex line the same way as justify-content but in the perpendicular direction.

Initial valuestretch
Applies toflex containers
Computed valueas specified
Canonical orderthe unique non-ambiguous order defined by the formal grammar

See Using CSS flexible boxes for more properties and information.


/* Align to cross-start */
align-items: flex-start;

/* Align to cross-end */
align-items: flex-end;

/* Center items in the cross-axis */
align-items: center;

/* Align the items' baselines */
align-items: baseline;

/* Stretch the items to fit */
align-items: stretch;

/* Global values */
align-items: inherit;
align-items: initial;
align-items: unset;


The cross-start margin edge of the flex item is flushed with the cross-start edge of the line.
The cross-end margin edge of the flex item is flushed with the cross-end edge of the line.
The flex item's margin box is centered within the line on the cross-axis. If the cross-size of the item is larger than the flex container, it will overflow equally in both directions.
All flex items are aligned such that their baselines align. The item with the largest distance between its cross-start margin edge and its baseline is flushed with the cross-start edge of the line.
Flex items are stretched such as the cross-size of the item's margin box is the same as the line while respecting width and height constraints.

Formal syntax

flex-start | flex-end | center | baseline | stretch


Specification Status Comment
CSS Flexible Box Layout Module
The definition of 'align-items' in that specification.
Last Call Working Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 21.0-webkit 20.0 (20.0)[1] 11.0 [2] 12.10 7.0-webkit 
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 4.4 ? 20.0 (20.0)[1] Not supported 12.10 7.0-webkit

[1] To activate flexbox support in Firefox 18 and 19, the user has to visit about:config and change the value of the layout.css.flexbox.enabled preference to true. Multi-line flexbox has been supported since Firefox 28.

[2] In Internet Explorer 10-11 (but not 12+), if column flex items have align-items: center; set on them and their content is too large, they will overflow the bounds of their container. See Flexbug #2 for more info.

See also

Document Tags and Contributors

 Last updated by: Sebastianz,