Access-Control-Allow-Origin

HTTP response header

Allows restricted resources on a web page to be requested from another domain outside the domain from which the first resource was served (Indicates whether the response can be shared.)

Header usage statistics

Access-Control-Allow-Origin response header information and usage statistics.

Websites using header Access-Control-Allow-Origin 487,111
Percentage of websites that use Access-Control-Allow-Origin header 4.26%
Total discovered header values 22,179
Header uses directives Yes
Header values are unique or random No
Most popular in the country United States of America

Access-Control-Allow-Origin Directives (2 total)

  • *
  • null

Access-Control-Allow-Origin Directives

Access-Control-Allow-Origin directives value information and usage statistics

Directive Share Websites count Unique Values
* 43.98% 214,223 1
null <0.1% 157 1

Distribution by websites popularity

Access-Control-Allow-Origin detection in the top websites by popularity

Top 10k sites 942 websites
Top 100k sites 4,099 websites
Top 1m sites 35,166 websites

Websites utilizing Access-Control-Allow-Origin

List of websites that use Access-Control-Allow-Origin header

Domain Country Rank Contacts
itunes.apple.com United States of America 22
lh3.googleusercontent.com United States of America 39
i.imgur.com United States of America 41
1.bp.blogspot.com United States of America 48
www.cnn.com United States of America 74
maxcdn.bootstrapcdn.com United States of America 77
See full domain list

Geographical Distribution

Header usage distribution by websites across the globe.






Common header values

List of top common Access-Control-Allow-Origin header values

Header value Value prevalence
* 57.33%
none 35.53%
cdn.kotisivukone.fi 0.08%
https://academic.oup.com 0.08%
https://img-fl.nccdn.net 0.07%
http://www.wishpond.com, https://www.wishpond.com 0.07%
http://lgportal.ddns.net 0.07%
https://pixieset.com 0.06%
https://imgur.com 0.05%
https://ws-paylands.paynopain.com 0.05%
http://localhost:3000 0.05%
null 0.04%
http://beliskin.com 0.04%
https://gc.synxis.com 0.03%
https://park.101datacenter.net 0.03%
undefined 0.03%
cms.unimelb.edu.au 0.03%
http://bcz.com 0.02%
domain 0.02%
https://prod1.evo.cloud 0.02%