Mixed Content Checker Tool Online

Last updated: Jul 12, 2026

Scan an HTTPS page for insecure HTTP resources that can trigger browser warnings, break trust, and weaken SEO performance.

Enter an HTTPS URL to scan for mixed content:

How the Mixed Content Checker Works

The tool fetches the page HTML and looks for insecure resources that are loaded from HTTP URLs.

HTTPS validation, the checker confirms the tested page is served over HTTPS.
Resource extraction, it scans images, scripts, stylesheets, iframes, video, audio, object tags, and inline CSS url() references.
Insecure URL detection, any resource that starts with http:// is flagged as mixed content.
Grouped reporting, results are shown by resource type so developers can fix the right template or asset path.

Why Mixed Content Matters

HTTPS is only as strong as the resources loaded into the page. Insecure assets can create security warnings and visual breakage.

Trust, users notice browser warnings and broken lock icons.
Security, HTTP scripts and iframes can be tampered with in transit.
Conversion, checkout, lead forms, and booking flows should never show insecure content warnings.
Technical SEO, pair this check with the Security Headers Checker and SSL Certificate Checker.

Mixed Content Fix Table

Issue	Fix
HTTP image URL	Upload the image to HTTPS hosting or update the source URL to https://.
HTTP script	Replace the script with a secure source. Never ignore insecure JavaScript.
HTTP stylesheet	Serve CSS from the same HTTPS domain or a trusted HTTPS CDN.
Old embed code	Replace legacy iframe or object embeds with current HTTPS embed snippets.

For a broader cleanup plan, use our technical SEO audit guide.

Mixed Content Types Reference

Not all mixed content is treated the same. Browsers split insecure HTTP resources on an HTTPS page into two categories. Active mixed content can alter the entire page, so browsers block it. Passive mixed content cannot run code, so browsers usually load it but downgrade the security indicator or show a warning. Knowing the category tells you how urgent each fix is.

Type	Examples	Browser behavior
Active mixed content	Scripts (<script>), stylesheets (<link rel="stylesheet">), iframes, XHR / fetch requests, and font resources loaded over HTTP.	Blocked. These can change or take over the whole page, so browsers refuse to load them on an HTTPS page. The resource simply fails.
Passive mixed content	Images (<img>), audio, and video sources loaded over HTTP.	Warned. Usually still loaded (and increasingly auto-upgraded to HTTPS), but the lock icon is downgraded or a warning is shown.

Migrating to HTTPS or chasing down stubborn insecure assets across templates? Our website maintenance services clean up mixed content, redirects, and SSL so every page loads securely.

Next steps

Mixed Content Checker related tools and articles

Continue with the closest follow-up checks and guides based on this tool's topic, crawl intent, and optimization workflow.

Security Headers Checker

SSL Certificate Checker

Redirect Checker

Technical SEO Audit: What to Check and How to Fix It

Benefits of Static Websites: Speed, Security, and SEO in 2026

Static vs Dynamic Websites: Differences and Which to Choose

Mixed Content Checker: FAQ

What counts as mixed content in this report?

On an HTTPS page, any extracted resource URL that resolves to http:// is listed as insecure. The report includes the resource type and absolute URL plus a count of all resource references it found.

Which resource references are scanned?

It reads src or data attributes on img, script, iframe, source, video, audio, and object tags, stylesheet link href values in either common attribute order, and url() references appearing anywhere in the returned HTML.

Which mixed-content requests can the checker miss?

It does not execute JavaScript, render the page, inspect network requests, parse srcset, open external stylesheets, follow CSS imports, or inspect iframe documents. Runtime calls and insecure URLs inside downloaded CSS or scripts can therefore be absent.

Why does an HTTP page return “Not an HTTPS page”?

Mixed-content blocking applies when a secure page requests insecure subresources. The tool stops before scanning an HTTP page because the first priority is moving the document itself to HTTPS.

Does zero issues guarantee the browser has no mixed content?

No. It means no http:// references matched this static HTML scan. Confirm with the browser console and Network panel while exercising important interactions, routes, lazy loading, media, and third-party widgets.

How should I fix an insecure resource?

Prefer an HTTPS URL from the same trusted provider, update hard-coded template or CMS values, and clear relevant caches. Do not merely change the scheme unless you have verified the resource is available and correct over HTTPS.

Why might the scan differ from my browser?

The page is fetched from Web Aloha's server without your cookies or session. Redirects, CDN location, consent state, authentication, bot handling, and client-side execution can produce a different set of resources.

What page data is sent during a mixed-content check?

The submitted URL is sent to Web Aloha's server so it can fetch and scan the public HTML. The endpoint does not include application logic that stores the page body or report, although infrastructure logs may record requests.

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