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-Origin2,538,910
Percentage of websites that use Access-Control-Allow-Origin header2.66%
Total discovered header valuesMore than 10,000
Header uses directivesYes
Header values are unique or randomNo
Most popular in the country US

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

  • *
  • null

Access-Control-Allow-Origin Directives

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

DirectiveShareWebsites countUnique Values
*86.44%2,194,5961
null0.27%6,9651

Connected technologies

Technologies that utilize the header

Loadmill, category Dev Tools, total 38 websites

Distribution by websites popularity

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

Top 10k sites1,271 websites
Top 100k sites10,533 websites
Top 1m sites76,770 websites

Websites utilizing Access-Control-Allow-Origin

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

See full domain list
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Geographical Distribution

Header usage distribution by websites across the globe.






Common header values

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

Header valueValue prevalence
*86.28%
https://developer.cimpress.io2.65%
https://app.hu-manity.co0.66%
*.iyp.tw0.53%
https://img-fl.nccdn.net0.31%
null0.27%
cdn.kotisivukone.fi0.25%
https://pixieset.com0.23%
http://gammatesting.jdseller.com0.15%
https://s7.addthis.com0.12%
https://admin.thebase.in0.11%
https://park.101datacenter.net0.10%
undefined0.08%
https://imgur.com0.08%
cross-origin0.08%
https://pixieset.com/0.07%
https://img-to.nccdn.net0.06%
https://www.matthies.de0.06%
none0.05%
http://localhost:30000.05%