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HTTP Header Security Test - HTTP Observatory | MDN

Created: May 8, 2025, 9:16 a.m. | Seen by us: May 15, 2025, 2:01 p.m.

meta description if known - Test your site’s HTTP headers, including CSP and HSTS, to find security problems and get actionable recommendations to make your website more secure. Test other websites to see how you compare.

Contact Information

Email: None

Phone: None

More Details

  • h1s:
  • h2s:
    • MDN
    • Support
    • Our communities
    • Developers
  • h3s:
  • title: HTTP Header Security Test - HTTP Observatory | MDN
  • emails:
  • gliner:
    • city: []
    • state: []
    • street: []
    • country: []
    • postcode: []
  • robots: None
  • keywords: None
  • og_title: HTTP Header Security Test - HTTP Observatory | MDN
  • addresses:
  • canonical: https://developer.mozilla.org/en-US/observatory
  • text_size: 1936
  • rta_rating: None
  • h1_analysis: missing
  • h2_analysis: 4 found
  • og_site_name: MDN Web Docs
  • url_analysis:
    • URL contains uppercase characters (use lowercase)
  • phone_numbers:
  • summary_issues:
    • URL: URL contains uppercase characters (use lowercase)
    • meta_description: long
    • No obvious responsive CSS (@media, max/min-width) detected in HTML source (may be in external CSS).
    • H1 tag is missing.
  • title_analysis: ok
  • meta_description: Test your site’s HTTP headers, including CSP and HSTS, to find security problems and get actionable recommendations to make your website more secure. Test other websites to see how you compare.
  • canonical_analysis: self-referencing
  • responsive_analysis:
    • score: 5
    • messages_bad: ['No obvious responsive CSS (@media, max/min-width) detected in HTML source (may be in external CSS).']
    • messages_good: ['Recommended viewport tag found.']
  • searchengine_analysis:
    • score: 20
    • messages_bad: ['H1 tag is missing.']
    • messages_good: ['Meta description tag found.', 'Site uses HTTPS.']
  • meta_description_analysis: long

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