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Security guide5 min

How to fix mixed content after moving to HTTPS

Understand why mixed content appears, why it weakens trust, and how to remove insecure assets properly.

A website can show the padlock and still load insecure resources in the background. That is what mixed content is, and it can quietly break trust and functionality.

For developers, agencies, and site owners who already use HTTPS but still see browser warnings or insecure assets.

What mixed content means

Mixed content happens when a secure page loads scripts, images, fonts, or other assets over HTTP.

Browsers treat that as a trust problem because the page is no longer fully protected end to end.

Why it happens

Mixed content often survives migrations because old templates, database values, plugins, or hardcoded assets keep referencing HTTP.

  • Hardcoded asset URLs
  • Old CMS content
  • Legacy third-party embeds
  • Redirect assumptions instead of direct secure URLs

How to remove it properly

Replace insecure asset URLs with HTTPS, update templates and stored content, and remove third-party resources that do not support secure delivery.

After that, recheck the page in real browsers and audit important templates, not just one URL.

Why it should stay monitored

Mixed content can reappear after content imports, plugin changes, or new embeds. Teams often assume the migration solved it forever, but production websites keep changing.

Mixed content checklist
  • No insecure assets are loaded on HTTPS pages
  • Templates do not hardcode HTTP URLs
  • Old content has been updated to secure asset links
  • Third-party embeds support HTTPS
  • Important templates have been checked, not just one page
  • Recurring checks are in place after deployments or content imports