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Mixed Content Checker

Mixed content occurs when an HTTPS page loads resources (images, scripts, stylesheets, iframes) over insecure HTTP. Browsers display security warnings or block resources entirely, breaking page functionality. Google has flagged HTTPS as a ranking signal since 2014, and mixed cont

Keyword Tools
Finds HTTP-loaded resources (img, script, iframe, etc.) inside HTTPS pages - these trigger "Not Secure" warnings.

Mixed content occurs when an HTTPS page loads resources (images, scripts, stylesheets, iframes) over insecure HTTP. Browsers display security warnings or block resources entirely, breaking page functionality. Google has flagged HTTPS as a ranking signal since 2014, and mixed cont

This free Mixed Content Checker from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.

How to use the Mixed Content Checker

  1. Enter your seed keyword or phrase.
  2. Pick the country or language if the tool supports targeting.
  3. Click the action button to run the search.
  4. Export the results to CSV, or copy them into your spreadsheet.

What you can do with the Mixed Content Checker

  • Find low-competition long-tail keywords for new content.
  • Audit a page for keyword density and over-optimisation.
  • Build content briefs around real search queries.
  • Plan PPC campaigns with realistic search-volume data.

Why use KX Toolkit's Mixed Content Checker

  • Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
  • Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
  • Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
  • Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
  • One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.

Tips for the best results

Combine 2-3 different keyword tools - autocomplete, density and competition - for a complete picture before publishing.

Related Keyword Tools

If you find this tool useful, explore the full Keyword Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.

What is mixed content and why is it a problem?
Mixed content occurs when an HTTPS page loads resources (images, scripts, stylesheets, iframes) over insecure HTTP. Browsers display security warnings or block resources entirely, breaking page functionality. Google has flagged HTTPS as a ranking signal since 2014, and mixed content undermines that signal. Pages with mixed content also show the dreaded broken padlock icon, eroding user trust and conversion rates measurably even without browsers blocking the resources.
Does mixed content directly affect rankings?
Indirectly but significantly. Google does not penalize for mixed content per se, but the user experience degradation (broken images, blocked scripts, browser warnings) hurts engagement metrics that feed back into ranking algorithms. Worse, browsers increasingly block mixed content by default, breaking page functionality entirely. A page with broken interactivity due to mixed content cannot rank well no matter how good the content is. Always achieve full HTTPS purity.
How do I find mixed content on a large site?
Browser dev tools console flags mixed content errors per page, but auditing thousands of URLs requires automated scanning. The mixed content checker crawls pages and reports HTTP resources by URL. Common culprits: hardcoded HTTP image paths in old blog posts, third-party widgets that have not migrated to HTTPS, embedded videos from legacy sources, and font CDN references from before HTTPS was universal. Database-level find-and-replace often clears legacy content quickly.
What is passive versus active mixed content?
Passive mixed content (images, audio, video) does not directly compromise security but breaks the secure padlock and may not load. Active mixed content (scripts, iframes, stylesheets) can compromise the entire page security and is blocked by all modern browsers by default. Both must be fixed for full HTTPS, but active mixed content is urgent because the page silently breaks for most users. Audit active first, then sweep passive systematically.
Can I use Content-Security-Policy to fix mixed content automatically?
Yes, the upgrade-insecure-requests directive automatically rewrites HTTP resource requests to HTTPS at the browser level. Add Content-Security-Policy: upgrade-insecure-requests to your HTTP response headers. This is a great safety net for legacy content you cannot easily rewrite, but the underlying URLs should still be fixed for cleanliness. Browsers without modern CSP support will still see mixed content, so do not rely on CSP alone for older browser users.
After migrating to HTTPS, how often should I scan for mixed content?
Monthly for active sites, especially after content imports, plugin updates, or third-party widget changes. New mixed content sneaks in via embeds (old YouTube or Vimeo URLs), affiliate links to non-HTTPS sites, and pasted email signatures. Add the checker to your release pipeline so any deployment introducing mixed content fails build. The cost of one scan is trivial compared to user-facing security warnings on production after a regression.

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