Alt-Svc

Read More at MDN DocsView Spec

Safe to Use

Alt-Svc is not safe to use.

It’s supported by 72% of global browsers.

Browsers

ChromeDec 11, 2008v1.0.0
26%100%
100% of Chrome users are running a supported version.
SafariUnknownvpreview
0%0%
There are no users of Safari running a supported version.
EdgeJan 15, 2020v79.0.0
5%100%
There are no users of Edge running a supported version.
FirefoxMay 12, 2015v38.0.0
3%100%
100% of Firefox users are running a supported version.

Version Breakdown

 
Agent
Support
Adoption
Chrome
Dec 11, 2008 v1.0.0
26%100%
100% of Chrome users are running a supported version.
Dec 11, 2008 – Latest
v1.0.0+
26%100%

Full Support

Chrome Android
Unknown v1.0.0
36%100%
100% of Chrome Android users are running a supported version.
Unknown
v1.0.0+
36%100%

Full Support

Edge
Jan 15, 2020 v79.0.0
5%100%
There are no users of Edge running a supported version.
Jan 15, 2020 – Latest
v79.0.0+
5%100%

Full Support

Firefox
May 12, 2015 v38.0.0
3%100%
100% of Firefox users are running a supported version.
May 12, 2015 – Latest
v38.0.0+
3%100%

Full Support

Mar 31, 2015 – May 12, 2015
v37.0.0 – v38.0.0

Partial Support

Only supports draft-04

Firefox for Android
May 12, 2015 v38.0.0
Firefox for Android supports this feature.
May 12, 2015 – Latest
v38.0.0+

Full Support

Mar 31, 2015 – May 12, 2015
v37.0.0 – v38.0.0

Partial Support

Only supports draft-04

Internet Explorer
Unsupported
Internet Explorer does not support this feature.

No Support

 
Quest Browser
Unknown v1.0.0
Quest Browser supports this feature.
Unknown
v1.0.0+

Full Support

Opera
Unknown v1.0.0
1%100%
100% of Opera users are running a supported version.
Unknown
v1.0.0+
1%100%

Full Support

Opera Android
Unknown v1.0.0
Opera Android supports this feature.
Unknown
v1.0.0+

Full Support

Safari
Unknown vpreview
Safari supports this feature.
Unknown
vpreview+

Full Support

Safari on iOS
Unsupported
Safari on iOS does not support this feature.

No Support

Samsung Internet
Apr 27, 2013 v1.0.0
2%100%
100% of Samsung Internet users are running a supported version.
Apr 27, 2013 – Latest
v1.0.0+
2%100%

Full Support

WebView Android
Sep 23, 2008 v1.0.0
WebView Android supports this feature.
Sep 23, 2008 – Latest
v1.0.0+

Full Support

See Also

Contribute