After installing an SSL certificate on your WordPress site, you might expect everything to load securely. But instead, you see browser warnings about “Mixed Content”—a sign that some elements are still being loaded over HTTP instead of HTTPS.
This guide will walk you through what causes mixed content errors and how to fix them quickly on your WordPress site.
What is Mixed Content?
Mixed content occurs when a page served over HTTPS includes resources (like images, scripts, or stylesheets) loaded over HTTP. This compromises security and can result in browser warnings like:
- “This site has insecure content”
- “Connection is not fully secure”
Step-by-Step: How to Fix Mixed Content Errors in WordPress
1. Update WordPress and Site URL Settings
- Log into your WordPress admin panel
- Go to **Settings > General**
- Make sure both the **WordPress Address (URL)** and **Site Address (URL)** use `https://` instead of `http://`
- Click Save Changes
2. Use a Plugin to Force HTTPS
The easiest way to resolve mixed content is to use a plugin.
Recommended: **Really Simple SSL**
- Install and activate from **Plugins > Add New**
- The plugin will auto-detect SSL and fix mixed content errors automatically
- It also handles .htaccess rules and redirects
3. Search and Replace URLs in the Database
If you previously uploaded content over HTTP, those links need to be updated.
Use the plugin **Better Search Replace**:
- Install and activate it
- Search for `http://yourdomain.com` and replace with `https://yourdomain.com`
- Select all tables and run the replacement (try a dry run first)
4. Manually Fix Hardcoded URLs
Some themes and plugins may hardcode URLs in PHP or HTML files.
- Access your site files via **cPanel > File Manager** or FTP
- Search your theme and plugin files for `http://` and change them to `https://`
Tip: Use a code editor like VS Code to quickly find and update URLs.
5. Check Image, Script, and CSS Links
Open your site in a browser and use Developer Tools (F12 or right-click > Inspect > Console). It will show which resources are being blocked due to mixed content.
Update the source of those resources to use `https://` or relative URLs (`//yourdomain.com`), or re-upload them if needed.
6. Force HTTPS via .htaccess
You can enforce HTTPS for all traffic by editing your `.htaccess` file.
- In cPanel, go to **File Manager > public_html**
- Edit `.htaccess` and add this code at the top:
```
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
</IfModule>
```
7. Clear Caches
After making changes, clear any caching plugins and your browser cache.
- Clear plugin cache (e.g., WP Super Cache, W3 Total Cache)
- Clear your CDN cache (if using Cloudflare or similar)
Final Thoughts
Mixed content errors can hurt your site's SEO and security. By updating URLs, using plugins like Really Simple SSL, and enforcing HTTPS, you can solve these issues and offer a fully secure experience to visitors.
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