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-Origin2,178,090
Percentage of websites that use Access-Control-Allow-Origin header2.61%
Total discovered header valuesMore than 10,000
Header uses directivesYes
Header values are unique or randomNo
Most popular in the country United States

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
*89.68%1,953,2231
null0.33%7,2291

Connected technologies

Technologies that utilize the header
Omni CMS, category Content Management System, total 2,009 websites
Loadmill, category Build CI Systems, total 37 websites

Access-Control-Allow-Origin header usage distribution by website popularity



Geographical Distribution

Header usage distribution by websites across the globe.



Websites utilizing Access-Control-Allow-Origin

List of websites that use Access-Control-Allow-Origin header
DomainCountryRankContacts
www.hugedomains.com United States14
maxcdn.bootstrapcdn.com United States26
static.parastorage.com United States31
static.wixstatic.com United States33
siteassets.parastorage.com United States34
cdn.jsdelivr.net United States42
See full domain list

Common header values

List of top common Access-Control-Allow-Origin header values
Header valueValue prevalence
*89.45%
null0.33%
https://img-fl.nccdn.net0.30%
cdn.kotisivukone.fi0.25%
https://developer.cimpress.io0.17%
https://app.hu-manity.co0.16%
http://gammatesting.jdseller.com0.16%
https://pixieset.com0.15%
https://admin.thebase.com0.12%
https://platform-api.sharethis.com0.12%
https://verwaltung.web-agentur.ch0.12%
https://park.101datacenter.net0.11%
https://cdn.asicentral.com https://commonmedia.asicentral.com https://media.asicdn.com https://media-asicdn.azureedge.net https://googleads.g.doubleclick.net0.09%
https://imgur.com0.09%
none0.07%
https://www.matthies.de0.07%
https://img-to.nccdn.net0.06%
https://*.hottgenroth.de0.05%
https://10to8.com0.05%
cross-origin0.05%