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Free HTML Mixed Content Checker

Instantly check any HTTPS page for insecure HTTP resources. Secure your HTTPS site and avoid SEO penalties with the HTML Mixed Content Checker – your instant tool to detect and resolve insecure HTTP resources that trigger browser warnings, damage user trust, and harm rankings. Scan your site in seconds to identify unsafe scripts, images, or stylesheets loading over HTTP, which undermine SSL/TLS encryption and risk Google’s “Not Secure” alerts. Built for developers and SEO teams, this tool simplifies compliance by pinpointing mixed content errors that slow page speed, break secure sessions, or deter visitors. Proactively fix vulnerabilities, preserve HTTPS integrity, and ensure seamless browsing experiences – eliminate mixed content risks faster and keep your site search-engine-safe.

Check for Mixed Content Issues

Enter a URL below to check if an HTTPS page is loading any insecure resources (images, scripts, CSS, etc.) via HTTP. Mixed content can break your SSL and negatively impact user trust and security.

Checking URL…

Why Mixed Content is Bad for SEO and Security

Mixed content occurs when an HTTPS page loads some resources (like images, videos, stylesheets, scripts) over an insecure HTTP connection. This is a security risk because:

  • Sensitive data might be exposed via the insecure resources.
  • An attacker could potentially manipulate the HTTP resources, even on an otherwise secure page.
  • Browsers often display warnings or block insecure resources, negatively impacting user experience and potentially breaking page functionality or layout.
  • Search engines prefer secure (HTTPS) websites, and mixed content issues can undermine your site’s perceived security and trustworthiness.

It’s essential to ensure all resources on an HTTPS page are also loaded via HTTPS or are relative URLs.

How to Use This Tool

  1. Enter the full HTTPS URL (starting with https://) that you want to check into the input field.
  2. Click the “Check for Mixed Content” button.
  3. The tool will fetch the page and analyze its HTML content for any resources explicitly linked using the insecure http:// protocol.
  4. The results area will display a summary status and a list of any insecure resources found, or a message if the page is not HTTPS or no issues were detected.

Fix mixed content warnings by updating the URLs of insecure resources to use https:// or scheme-relative URLs (starting with //), or load them from a secure source.