The align-self CSS property aligns flex items of the current flex line overriding the align-items value. If any of the item's cross-axis margin is set to auto, then align-self is ignored.

The property doesn't apply to block-level boxes, or to table cells.

Syntax

/* Keyword values */ 
align-self: auto; 
align-self: normal; 

/* Positional alignment */ 
/* align-self does not take left and right values */
align-self: center; /* Put the item around the center */ 
align-self: start; /* Put the item at the start */ 
align-self: end; /* Put the item at the end */ 
align-self: self-start; /* Align the item flush at the start */ 
align-self: self-end; /* Align the item flush at the end */ 
align-self: flex-start; /* Put the flex item at the start */ 
align-self: flex-end; /* Put the flex item at the end */ 

/* Baseline alignment */ 
align-self: baseline; 
align-self: first baseline; 
align-self: last baseline; 
align-self: stretch; /* Stretch 'auto'-sized items to fit the container */ 

/* Overflow alignment */ 
align-self: safe center; 
align-self: unsafe center; 

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

Values

auto
Computes to the parent's align-items value.
normal
The effect of this keyword is dependent of the layout mode we are in:
  • In absolutely-positioned layouts, the keyword behaves like start on replaced absolutely-positioned boxes, and as stretch on all other absolutely-positioned boxes.
  • In static position of absolutely-positioned layouts, the keyword behaves as stretch.
  • For flex items, the keyword behaves as stretch.
  • For grid items, this keyword leads to a behavior similar to the one of stretch, except for boxes with an aspect ratio or an intrinsic sizes where it behaves like start.
  • The property doesn't apply to block-level boxes, and to table cells.
self-start
Aligns the items to be flush with the edge of the alignment container corresponding to the item's start side in the cross axis.
self-end
Aligns the items to be flush with the edge of the alignment container corresponding to the item's end side in the cross axis.
flex-start
The cross-start margin edge of the flex item is flushed with the cross-start edge of the line.
flex-end
The cross-end margin edge of the flex item is flushed with the cross-end edge of the line.
center
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.
baseline
first baseline

last baseline
Specifies participation in first- or last-baseline alignment: aligns the alignment baseline of the box’s first or last baseline set with the corresponding baseline in the shared first or last baseline set of all the boxes in its baseline-sharing group.
The fallback alignment for first baseline is start, the one for last baseline is end.
stretch
If the combined size of the items along the cross axis is less than the size of the alignment container and the item is auto-sized, its size is increased equally (not proportionally), while still respecting the constraints imposed by max-height/max-width (or equivalent functionality), so that the combined size of all auto-sized items exactly fills the alignment container along the cross axis.
safe
If the size of the item overflows the alignment container, the item is instead aligned as if the alignment mode were start.
unsafe
Regardless of the relative sizes of the item and alignment container, the given alignment value is honored.

Formal syntax

auto | normal | stretch | <baseline-position> | <overflow-position>? <self-position>

where
<baseline-position> = [ first | last ]? baseline
<overflow-position> = unsafe | safe
<self-position> = center | start | end | self-start | self-end | flex-start | flex-end

Example

HTML

<section>
  <div>Item #1</div>
  <div>Item #2</div>
  <div>Item #3</div>
</section>

CSS

section {
  display: flex;
  align-items: center;
  height: 120px;
  background: beige;
}

div {
  height: 60px;
  background: cyan;
  margin: 5px;
}

div:nth-child(3) {
  align-self: flex-end;
  background: pink;
}

Result

Specifications

Specification Status Comment
CSS Box Alignment Module Level 3
The definition of 'align-self' in that specification.
Working Draft Update to latest syntax definitions.
CSS Flexible Box Layout Module
The definition of 'align-self' in that specification.
Candidate Recommendation Initial definition.

Initial valueauto
Applies toflex items, grid items, and absolutely-positioned boxes
Inheritedno
Mediavisual
Computed valueauto computes to itself on absolutely-positioned elements, and to the computed value of align-items on the parent (minus any legacy keywords) on all other boxes, or start if the box has no parent. Its behavior depends on the layout model, as described for justify-self. Otherwise the specified value.
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Browser compatibility

Support in Flex layout

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 36
Full support 36
Partial support 29
Notes
Notes Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52.
Full support 21
Prefixed
Prefixed Requires the vendor prefix: -webkit-
Edge Full support 12Firefox Full support 20
Notes
Full support 20
Notes
Notes Before Firefox 27, only single-line flexbox is supported.
No support 18 — 20
Disabled
Disabled From version 18 until version 20 (exclusive): this feature is behind the layout.css.flexbox.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
Full support 49
Prefixed
Prefixed Requires the vendor prefix: -webkit-
Full support 48
Prefixed Disabled
Prefixed Requires the vendor prefix: -webkit-
Disabled From version 48: this feature is behind the layout.css.prefixes.webkit preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE Full support 11Opera Full support 12.1Safari No support NoWebView Android Full support 37
Full support 37
Partial support 4.4
Notes
Notes Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52.
Full support Yes
Prefixed
Prefixed Requires the vendor prefix: -webkit-
Chrome Android Full support 36
Full support 36
Partial support 29
Notes
Notes Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52.
Full support 25
Prefixed
Prefixed Requires the vendor prefix: -webkit-
Edge Mobile Full support Yes
Full support Yes
Full support Yes
Prefixed
Prefixed Requires the vendor prefix: -webkit-
Firefox Android Full support YesOpera Android No support NoSafari iOS No support NoSamsung Internet Android ?
start and endChrome ? Edge ? Firefox Full support YesIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android ?
left and rightChrome ? Edge ? Firefox Full support 52IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android Full support 52Opera Android ? Safari iOS ? Samsung Internet Android ?
baselineChrome ? Edge ? Firefox Full support YesIE ? Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android Full support YesOpera Android ? Safari iOS ? Samsung Internet Android ?
first baseline and last baselineChrome ? Edge ? Firefox Full support 52IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android Full support 52Opera Android ? Safari iOS ? Samsung Internet Android ?
stretchChrome ? Edge ? Firefox Full support 52IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android Full support 52Opera Android ? Safari iOS ? Samsung Internet Android ?
safe and unsafeChrome No support NoEdge No support NoFirefox Full support 63IE No support NoOpera No support NoSafari ? WebView Android ? Chrome Android ? Edge Mobile No support NoFirefox Android Full support 63Opera Android ? Safari iOS ? Samsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.
Requires a vendor prefix or different name for use.
Requires a vendor prefix or different name for use.

Support in Grid layout

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 57Edge Full support 16Firefox Full support 52IE Partial support 10
Prefixed Notes
Partial support 10
Prefixed Notes
Prefixed Requires the vendor prefix: -ms-
Notes IE10 and 11 have the property -ms-grid-column-align which acts in a similar way to align-self.
Opera Full support 44Safari Full support 10.1WebView Android Full support 57Chrome Android Full support 52Edge Mobile Full support YesFirefox Android Full support 52Opera Android Full support 44Safari iOS Full support 10.3Samsung Internet Android Full support 6.2

Legend

Full support  
Full support
Partial support  
Partial support
See implementation notes.
See implementation notes.
Requires a vendor prefix or different name for use.
Requires a vendor prefix or different name for use.

See also