English
Magyar
Did you know that from October 2026, Google Chrome version 154 will, by default, display a warning on any public website that does not use end-to-end encryption? Even if you have installed an SSL certificate, if the browser address bar still displays the ‘not secure’ message or the missing padlock icon, your visitors’ trust will be immediately undermined. This highlights the fact that fixing the ‘mixed content’ error is not merely a minor technical tweak, but is essential to a website’s survival in the increasingly strict world of modern browsers. You may well feel the uncertainty caused by technical code changes, but a secure user experience is no longer a matter for compromise.
In this guide, you’ll learn how to identify and permanently fix mixed content errors to ensure your website remains secure and SEO-friendly. We don’t settle for treating the symptoms, as the real solution lies in cleaning up the source code and the database, rather than using dynamic rewriting. We’ll walk you through the key diagnostic steps, WordPress-specific solutions and server-side configurations. Our aim is to ensure the green padlock appears consistently on every subpage, thereby protecting your SEO rankings and your users’ data.
What is a ‘mixed content’ error and why does it appear after SSL?
A mixed content error occurs when a website served via a secure HTTPS protocol attempts to load resources that are delivered via an unencrypted HTTP connection. This phenomenon fundamentally undermines the security of the website. Mixed content compromises the integrity of end-to-end encryption. It is of no use to the site having a valid certificate if certain elements leave the door open to attackers. The security vulnerability that arises in such cases enables man-in-the-middle attacks, where traffic can be intercepted or altered.
The most common causes of this error are static URLs left in the database, outdated template files or incorrectly configured external scripts. It is common for the website’s engine to still load images or style sheets using the old, insecure links. When rectifying the “mixed content” error, it is precisely these hidden remnants that must be tracked down and updated. By 2026, modern browsers will handle such cases extremely strictly and will immediately alert the user if the connection cannot be considered fully secure.
Passive vs. Active mixed content: What’s the difference?
Browsers react differently depending on the type of mixed content. Passive content includes images, videos and audio files. These pose a lower immediate risk, but the absence of the padlock icon undermines visitors’ trust. In contrast, active content, such as JavaScript files, CSS style sheets or iframes, poses a critical security risk. These are now blocked by browsers almost without exception. Active content is more dangerous because attackers can use it to run malicious code, steal session cookies or obtain sensitive user data. One of the most effective defence mechanisms is the use of the Content Security Policy (CSP), which helps to restrict authorised sources.
How can visitors recognise the error?
For visitors, the error becomes apparent in the form of visual warnings. By 2026, Chrome and Firefox will label pages containing mixed content as ‘Not secure’. Instead of the familiar green padlock, we will often see a grey icon or a yellow exclamation mark. Safari is even stricter and, by default, blocks all such resources, which can cause the page to break. It is important to understand that the presence of an SSL certificate alone does not guarantee success. If the source code is not clean, the browsers’ protective mechanisms will kick in, which impairs both the user experience and conversion rates.
Why is fixing mixed content critical from an SEO and security perspective?
By 2026, website security will no longer be merely an optional extra, but the cornerstone of basic functionality and visitor trust. When a user opens your site and the browser immediately displays a warning in the address bar, credibility vanishes in an instant. Based on an analysis of industry data and user behaviour, around 85 per cent of visitors immediately leave websites where they encounter a warning indicating a security risk. This drastic drop-off directly undermines conversion rates and business results. Fixing the ‘mixed content’ error must therefore be a top priority for any conscientious website owner planning for the long term in the online space.
The relationship between SEO and HTTPS in 2026
Google’s search engine treats the HTTPS protocol as a ranking factor, but the requirements are now much stricter than they were a few years ago. Browser updates coming into effect in 2026, particularly the release of Chrome 154 in October, will make the enforcement of secure connections the default for all public websites. If Googlebot encounters mixed content during indexing, the integrity of the page is compromised, which may put it at a disadvantage in search results. Core Web Vitals metrics and security compliance go hand in hand; an incorrectly configured HTTPS environment can result in slower loading times and technical errors. To maintain stability, it is essential to have a professional web hosting service capable of meeting modern security requirements.
Security risks: What every website owner needs to know
For those interested in the technical details, Mozilla’s guide to mixed content provides a deeper insight into the various risk levels. The most dangerous scenario is the presence of active mixed content, where attackers can modify scripts that are loaded unencrypted. During such a man-in-the-middle attack, session cookies can be stolen, allowing attackers to gain access to users’ accounts, or they may even inject malicious code into the page. This not only puts visitors at risk but also raises serious GDPR compliance concerns, as maintaining the integrity of encryption is the legal responsibility of the website operator. Fixing the ‘mixed content’ error is therefore not merely an aesthetic issue, but a fundamental data protection obligation.
The ever-accelerating update cycle of web browsers – such as the fortnightly cycle introduced with version 152 of Microsoft Edge – means that the response time to security vulnerabilities has been reduced. If a website’s structure contains outdated links, modern security mechanisms will simply block the affected elements, which can cause the site to break. To maintain a professional online presence, it is worth regularly checking the source code and, if necessary, seeking expert help with configuration.
How to identify mixed content errors? (Debugging guide)
Fixing a ‘mixed content’ error always starts with identifying the exact source. It’s not enough to know that the padlock icon is missing; we also need to see the specific files that are causing the problem. The quickest way to do this is to use your browser’s developer tools. Open the page in question, then press the F12 key or the Ctrl+Shift+I shortcut. A comprehensive control panel will then appear; clicking on the ‘Console’ tab will immediately reveal any red or yellow error messages.
Look for lines beginning with ‘Mixed Content: The page at… was loaded over HTTPS’. These entries show exactly which images, scripts or style sheets are being loaded via an unencrypted HTTP connection. The file path at the end of the message helps you identify whether the content comes from your own server or an external source. As Google’s web.dev article on mixed content highlights, browsers treat these links as a security risk, so you need to list every single element during debugging.
Debugging with the browser’s developer tools
The ‘Security’ tab in Chrome DevTools provides a more comprehensive overview of the website’s status. Here you can view the certificate’s validity and the details of the secure connection. If there is too much information in the console, use the filter and enter the word ‘mixed’. This will ensure that only the relevant warnings remain visible. If you want to see the source of an element directly in the code, you can search for the incorrect URL on the ‘Elements’ tab. Here, you’ll often find that a hardcoded link is causing the problem, which needs to be fixed in the template files.
Bulk checks and automated tools
For larger websites, checking page by page is slow and inefficient. In such cases, it is worth using the Screaming Frog SEO Spider software, which is capable of crawling the entire website. The program lists mixed content errors separately in the ‘Security’ report, making it easier to carry out system-wide corrections. If you do not require such an in-depth analysis, the online tools Why No Padlock or Jitbit SSL Check also provide an excellent service. These cloud-based scanners generate a quick report on the most critical errors. If you’re working with specialised server configurations or a unique environment, it’s worth having a look around our knowledge base, where you’ll find further technical assistance with troubleshooting.
Fixing mixed content errors: for WordPress and custom websites
Instead of treating the symptoms, the source of the error must be eliminated to ensure long-term stability. Many people make the mistake of relying on plugins such as Really Simple SSL. Whilst these tools may seem convenient, they merely rewrite the links dynamically at the moment of loading. This places an unnecessary load on the server, slows down the site, and if the extension is disabled, the problem returns immediately. The ‘mixed content’ error can only be considered permanently fixed once all links in both the database and the source code have been switched to the HTTPS protocol.
A step-by-step guide to cleaning your WordPress database
The most critical part of the process is the backup. Before making any changes to the database, create a full backup via the cPanel hosting control panel. To carry out the fix, we recommend using the Better Search Replace plugin, which is capable of replacing old URLs in bulk. In the settings, enter the search term (http://sajatdomain.hu) and the new format (https://sajatdomain.hu). Always run a ‘Dry Run’ (test run) first. This will show you how many tables and rows contain links to be modified, without actually rewriting them. Only carry out the actual replacement if the figures seem reasonable.
Manual fixes and .htaccess settings
For bespoke websites, manually checking the source code is essential. The problem is often caused by background images embedded in CSS files or API calls hard-coded into JavaScript files. These need to be corrected in the header.php, footer.php and stylesheet files. For server-side enforcement, use the .htaccess file, which automatically redirects all HTTP requests to the secure HTTPS protocol. As a modern solution, it is also worth configuring the Content Security Policy (CSP) header. The ‘upgrade-insecure-requests’ directive instructs the browser to attempt to fetch unencrypted resources automatically via HTTPS before blocking them.
Managing external sources
External scripts or widgets that do not support HTTPS can cause problems. If an old weather widget or currency converter is only available via HTTP, browsers will block it. In this case, you have two options: find a more modern alternative, or try hosting the script locally on your own server. If you use a CDN service, such as Cloudflare, check the SSL/TLS settings. We recommend using ‘Full (Strict)’ mode for end-to-end encryption. For secure and fast performance, choose a professional web hosting plan that supports the latest security protocols.
How can you prevent errors with aWh hosting and SSL settings?
Prevention is always a more effective and cost-efficient solution than rectifying technical problems after they have arisen. In a properly configured server environment, the majority of security vulnerabilities are patched before visitors even notice them. aWh’s systems have been designed so that the use of secure protocols is not a burden, but a default service. Rather than fixing the ‘mixed content’ error, it is worth placing the emphasis on correct default settings and modern development practices.
Automated SSL management in the aWh environment
The cornerstone of continuous protection is the AutoSSL feature available on aWh’s cPanel hosting interface. This technology automatically handles the application for, installation and renewal of certificates, so you don’t have to worry about downtime caused by expiry dates. By enabling the ‘Force HTTPS Redirect’ option under the ‘Domains’ menu in the cPanel control panel, you can enforce an encrypted connection with a single click. This server-side setting ensures that all requests are routed via the secure channel. Should you encounter a ‘mixed content’ warning in a specific environment despite these settings, our expert support team will provide dedicated assistance in pinpointing the source of the issue.
Developer ‘best practice’ solutions
The linking methods used when building a website fundamentally determine its future stability. The safest method is to use relative paths. Instead of hard-coding the full URL into the code (for example, http://domain.hu/images/logo.png), use the shorter, relative format (/images/logo.png). This solution is protocol-independent, so it will continue to work flawlessly even after the switch to SSL. Although protocol-relative links (//domain.hu/script.js) were common in the past, by 2026, pure HTTPS or relative paths will be the industry standard.
For more complex projects or bespoke software requirements, a KVM VPS offers the greatest freedom. Here, you have full access to the server’s configuration files, allowing you to fine-tune security headers and encryption protocols. Regular audits built into the development process and keeping the CMS (such as WordPress) up to date are essential. Testing carried out in the staging environment ensures that updates do not cause unexpected errors on the live site. Careful development combined with a stable hosting service guarantees that fixing ‘mixed content’ errors will not waste your time in the future.
Take action today to ensure your website’s security and its SEO future!
By 2026, website security will no longer be merely an isolated technical detail, but the cornerstone of business credibility. We have seen that rectifying the ‘mixed content’ error is essential for maintaining visitor trust and stabilising search engine optimisation rankings. A thorough clean-up of the source code and database, combined with server-side enforcement, guarantees flawless HTTPS operation. Remember, due to the increasingly strict regulations of modern browsers, delaying action can result in a direct loss of traffic and serious security risks.
To maintain stability, choose a partner whose technological expertise and automated systems take the burden of security configurations off your shoulders. With over 10 years’ experience and an expert English-speaking support team, aWh supports its customers in overcoming even the most complex technical challenges. Free AutoSSL comes as standard with all our plans, so you’ll never have to worry about certificate renewals. Our robust infrastructure ensures that your website always complies with the latest industry standards.
Switch to secure and fast aWh web hosting, where managing SSL is a breeze!
Start the repairs today and ensure your website continues to run smoothly and professionally in the future!
Our knowledge base article describes the steps to be taken on aWh’s hosting service: What is mixed content, and how can I fix it?
Frequently Asked Questions about mixed content
Why does Chrome say the connection isn’t completely secure?
Chrome displays this warning because, although the homepage itself loads via the HTTPS protocol, certain elements are delivered via an unencrypted HTTP connection. Unless this ‘mixed content’ error is rectified, it poses a security risk, as the integrity of the encryption is compromised. This is how the browser protects users from man-in-the-middle attacks. From 2026, Chrome may even block such elements by default to ensure complete security.
Is installing a plugin enough to fix the mixed content error?
No, plugins often only provide a temporary solution to the problem. Although there are tools available for dynamically rewriting links, these can slow down the site and place an unnecessary load on the server. To achieve a stable and permanent result, the links must be changed to HTTPS in the database and the source code. This ensures that the website remains secure for all visitors in the future, even without the need for external software.
Can a mixed content error cause a website to crash?
Yes, mixed content can cause serious operational issues with a website’s structure. Whilst images usually only cause the padlock icon to disappear, active mixed content elements, such as JavaScript files, are immediately blocked by modern browsers. If a critical function or a CSS file responsible for the design fails to load, the page layout may break or certain buttons may become completely unusable for users.
How can I fix mixed content if I’m not using WordPress?
For custom websites, a manual source code audit and database operations are required to resolve the issue. Search the code for internal links beginning with ‘http://’ and replace them with ‘https://’ or relative paths. In the database, you can run bulk replacement commands on the tables using phpMyAdmin. It is also advisable to configure global HTTPS redirection in the .htaccess file to strengthen server-side security and ensure consistency.
Does mixed content affect the speed of my website?
Yes, mixed content can have a negative impact on loading times and the user experience. Browsers use extra resources to identify and handle insecure requests every time a page loads. If the server has to constantly handle redirects due to incorrectly specified links, this increases response times. A clean HTTPS structure is not only more secure but also enables more efficient serving, which improves Core Web Vitals metrics.
What should I do if I get a mixed content error because of an external image?
First, check whether the external resource is accessible via the HTTPS protocol in your browser. If so, simply replace the link in the source code with the secure version. If the external server does not support encryption, the best solution is to download the image and host it locally on your own secure server. This gives you full control over the resource and permanently removes the security warning from the page.
How does the .htaccess file help to enforce HTTPS?
The .htaccess file defines server-side rules for managing traffic in Apache-based environments. With a properly written code snippet, you can force all unencrypted HTTP requests to be automatically redirected to the secure HTTPS version. This acts as a sort of safety net, catching any requests that have accidentally remained on HTTP. On aWh’s hosting plans, this setting helps to maintain a consistent and secure user experience across all subpages.
Can this error be avoided even with a free SSL certificate?
Yes, the free AutoSSL certificate is perfectly suited to maintaining a secure connection and providing encryption. A mixed content error does not depend on the type of certificate, but on the correctness of the website’s internal links. Whether you’re using a free or paid SSL, the website’s code must be clean. aWh provides free AutoSSL with every hosting plan, which renews automatically, so all you need to focus on is the integrity of your content.