Mixed content checker
Find insecure HTTP resources loaded on your HTTPS pages.
A mixed content checker loads an HTTPS page and identifies any resources, such as images, scripts, stylesheets, or iframes, that are still requested over insecure HTTP. These references undermine the page's security, trigger browser warnings, and can cause active content to be blocked outright. A clean result means every asset is served securely and the padlock stays intact. Because a single edit can reintroduce an insecure link, it's worth re-checking after changes.
Frequently asked questions
Why is mixed content a problem?
Insecure resources on a secure page can be intercepted or altered in transit, so browsers warn users or block active mixed content like scripts entirely. It breaks both security and the visible padlock.
What's the difference between active and passive mixed content?
Passive content like images is displayed with a warning, while active content like scripts and iframes is usually blocked because it can compromise the whole page.
How do I fix mixed content?
Change the resource URLs from http:// to https:// (or protocol-relative //), and make sure the host actually serves them over HTTPS. The checker lists each offending URL so you can find them fast.
How can I find mixed content without scanning each page?
Set a Content-Security-Policy with upgrade-insecure-requests to auto-rewrite HTTP asset URLs to HTTPS, and use report-uri/report-to to collect violations the browser sees across real traffic.
Where does mixed content usually creep in?
Hardcoded http:// URLs in templates, an old CMS database, third-party widgets and ad tags, and email or CDN links are the usual sources. Anything pulled in over HTTP on an HTTPS page counts.
Does mixed content affect SEO?
Indirectly — browser warnings and blocked resources hurt user trust and can break functionality, which affects engagement. Search engines also favor cleanly secure pages.
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