Content-Security-Policy

HTTP response header

CSP provides a standard method for website owners to declare approved origins of content that browsers should be allowed to load on that website

Header usage statistics

Content-Security-Policy response header information and usage statistics.

Websites using header Content-Security-Policy 755,119
Percentage of websites that use Content-Security-Policy header 6.95%
Total discovered header values 219,167
Header uses directives Yes
Header values are unique or random No
Most popular in the country United States of America

Content-Security-Policy Directives (26 total)

  • base-uri
  • block-all-mixed-content
  • child-src
  • connect-src
  • default-src
  • font-src
  • form-action
  • frame-ancestors
  • frame-src
  • img-src
  • manifest-src
  • media-src
  • object-src
  • plugin-types
  • prefetch-src
  • referrer
  • report-to
  • report-uri
  • sandbox
  • script-src
  • script-src-attr
  • style-src
  • style-src-attr
  • trusted-types
  • upgrade-insecure-requests
  • worker-src

Content-Security-Policy Directives

Content-Security-Policy directives value information and usage statistics

Directive Share Websites count Unique Values
upgrade-insecure-requests 30.17% 227,851 72
block-all-mixed-content 12.71% 95,958 44
default-src <0.1% 658 8
frame-ancestors <0.1% 278 3
base-uri <0.1% 62 3
object-src <0.1% 53 1
sandbox <0.1% 50 1
frame-src <0.1% 37 1
report-uri <0.1% 33 7
child-src <0.1% 17 2
media-src <0.1% 17 1
worker-src <0.1% 14 1
manifest-src <0.1% 10 1
plugin-types <0.1% 10 1
report-to <0.1% 9 1
prefetch-src <0.1% 7 1
script-src <0.1% 7 3
connect-src <0.1% 6 3
style-src <0.1% 3 2
trusted-types <0.1% 3 1
form-action <0.1% 2 2
img-src <0.1% 2 1
referrer <0.1% 2 1
script-src-attr <0.1% 2 1
style-src-attr <0.1% 2 1
font-src <0.1% 1 1

Connected technologies

Technologies that utilize the header

Vimeo, category Video Players, total 186,505 websites
AddThis, category Widgets, total 139,285 websites
PayPal, category Payment Processors, total 91,146 websites
Drift, category Live Chat, total 15,952 websites
Tealium, category Tag Managers, total 6,896 websites
Contentful, category Content Management System, total 3,678 websites
Afterpay, category Payment Processors, total 3,455 websites
Heap, category Analytics, total 3,042 websites
BazaarVoice, category Analytics, total 2,183 websites
Scene7, category Content Management System, total 756 websites

Distribution by websites popularity

Content-Security-Policy detection in the top websites by popularity

Top 10k sites 1,842 websites
Top 100k sites 11,244 websites
Top 1m sites 68,929 websites

Websites utilizing Content-Security-Policy

List of websites that use Content-Security-Policy header

Domain Country Rank Contacts
www.facebook.com Ireland 2
twitter.com United States of America 3
instagram.com United States of America 7
www.instagram.com Ireland 7
www.linkedin.com United States of America 9
plus.google.com United States of America 12
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 Content-Security-Policy header values

Header value Value prevalence
frame-ancestors 'self' 17.75%
block-all-mixed-content; frame-ancestors 'none'; upgrade-insecure-requests; 13.34%
upgrade-insecure-requests 13.00%
upgrade-insecure-requests; 6.83%
default-src 'none'; style-src 'unsafe-inline'; img-src data:; connect-src 'self' 1.62%
upgrade-insecure-requests; default-src https: data:; script-src https: data: 'unsafe-inline' 'unsafe-eval'; style-src https: blob: 'unsafe-inline'; 1.21%
block-all-mixed-content 0.81%
frame-ancestors https://my.bigcartel.com; 0.63%
frame-ancestors 'self'; 0.52%
block-all-mixed-content; frame-ancestors *; upgrade-insecure-requests; 0.51%
frame-ancestors 'self' websitebuilder.godaddy.com websitebuilder.secureserver.net 0.46%
frame-ancestors 'self' https://*.granicus.com http://*.granicus.com https://platform.civicplus.com https://account.civicplus.com https://analytics.civicplus.com; img-src * data:; worker-src * data: blob: 'unsafe-eval' 'unsafe-inline'; script-src * about: 0.42%
frame-ancestors 'none' 0.41%
script-src 'self' 0.39%
default-src https: data: 'unsafe-inline' 'unsafe-eval' 0.37%
frame-ancestors 'self' https://*.webflow.com http://*.webflow.com http://*.webflow.io http://webflow.com https://webflow.com 0.37%
frame-ancestors 'self' ; 0.34%
frame-ancestors 'self'; upgrade-insecure-requests 0.33%
frame-ancestors 'none'; 0.31%
upgrade-insecure-requests; report-uri /__csp-collector/index 0.27%