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

See Using CSS flexible boxes for more properties and information.


Formal syntax: flex-start | flex-end | center | baseline | stretch
align-items: flex-start
align-items: flex-end
align-items: center
align-items: baseline
align-items: stretch

align-items: inherit


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.




Specification Status Comment
CSS Flexible Box Layout Module Candidate Recommendation  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 21.0-webkit 18.0 (18.0) (behind a pref) [1]
20.0 (20.0)
11.0 12.10 7.0-webkit 
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 4.4 ? ? Not supported 12.10 7.0-webkit

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

See also

Document Tags and Contributors

Last updated by: Sheppy,