The Difference between HTTP & HTTPS and HSTS Support and Their Effect on SEO

In the ever-evolving landscape of the internet, where websites compete for attention and visibility, Search Engine Optimization (SEO) has become a crucial aspect of online success. SEO encompasses a wide range of strategies and techniques to improve a website’s ranking on search engine result pages (SERPs). One fundamental factor that can influence SEO is the choice between HTTP and HTTPS, along with the implementation of HSTS support. In this blog, we’ll explore the difference between HTTP and HTTPS, delve into what HSTS support means, and discuss their collective impact on SEO.

Understanding HTTP and HTTPS

To comprehend the significance of HTTP, HTTPS, and HSTS support, let’s start with the basics.

HTTP (Hypertext Transfer Protocol):

HTTP is the standard protocol used for transmitting data between a web server and a user’s web browser. It is the foundation of data communication on the World Wide Web. When you visit a website that begins with “http://,” you’re using a connection based on HTTP.

HTTPS (Hypertext Transfer Protocol Secure):

HTTPS is the secure version of HTTP. It employs encryption to protect the data exchanged between a user’s browser and the web server. When you visit a website that starts with “https://,” you’re using a secure and encrypted connection. This encryption is achieved using technologies like SSL (Secure Sockets Layer) or its successor, TLS (Transport Layer Security).

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Key Differences between HTTP and HTTPS

  1. Security: The primary difference is security. HTTP transmits data in plain text, making it vulnerable to interception by malicious parties. In contrast, HTTPS encrypts the data, ensuring that it remains confidential and secure during transmission.
  2. Data Integrity: HTTPS provides data integrity, meaning that the data sent from the server to the browser cannot be tampered with during transit. This prevents potential modifications by attackers.
  3. Trustworthiness: Browsers indicate the security level of a website to users through visual cues. Secure websites with HTTPS display a padlock icon in the address bar, instilling trust and confidence in visitors.
  4. SEO Impact: Search engines like Google consider HTTPS as a ranking factor. Websites using HTTPS are more likely to receive a ranking boost compared to their HTTP counterparts.

The Role of HSTS Support

Now, let’s introduce HSTS and understand how it complements HTTPS.

HSTS (HTTP Strict Transport Security):

HSTS is a web security policy mechanism that helps protect websites from certain types of attacks, such as SSL stripping and man-in-the-middle attacks. It instructs web browsers to interact with a website using only secure HTTPS connections, even if the user types “http://” in the address bar. HSTS is implemented through response headers sent by the web server.

Benefits of HSTS:

  1. Enhanced Security: HSTS mitigates the risk of downgrading attacks where an attacker tries to force a user’s connection to HTTP. This ensures that all interactions remain secure.
  2. Improved SEO: Just like HTTPS, HSTS can positively impact SEO rankings. Search engines recognize and reward websites that prioritize security.
  3. User Experience: HSTS provides a better user experience by automatically redirecting users to the secure version of a website, reducing the chances of encountering security warnings or errors.

Effect on SEO

Now that we’ve covered the basics let’s explore how these elements affect SEO.

1. Ranking Boost with HTTPS:

In 2014, Google announced that it would consider HTTPS as a ranking factor. Websites using HTTPS receive a slight boost in search engine rankings compared to HTTP websites. This ranking signal is part of Google’s commitment to promoting a safer and more secure web. While the impact of HTTPS on SEO may not be the most significant factor, it’s still an important one, especially in competitive niches.

2. Trust and User Experience:

Websites using HTTPS and displaying the padlock icon in the address bar convey trust to users. Visitors are more likely to engage with and trust secure websites, leading to higher user satisfaction and potentially longer time spent on the site. Positive user experiences can indirectly impact SEO Singapore by reducing bounce rates and increasing dwell time.

3. HSTS and Security:

Implementing HSTS adds an extra layer of security to your website, ensuring that all connections remain secure. This not only protects your users but also sends a strong signal to search engines that your website prioritizes security. While HSTS itself may not directly impact rankings, it contributes to the overall trustworthiness of your site.

4. Mobile-First Indexing:

Google has transitioned to a mobile-first indexing approach, where it primarily uses the mobile version of a website for ranking and indexing. HTTPS is crucial for mobile websites, as it ensures that data transmitted between mobile devices and servers is secure. Mobile-friendliness and security are now integral parts of SEO.

5. Avoiding Penalties:

Google may penalize websites that engage in unsafe practices, such as collecting sensitive data on non-secure HTTP pages. Such penalties can have a severe negative impact on SEO rankings. Implementing HTTPS and HSTS helps you avoid these penalties.


In the modern digital landscape, where user trust and online security are paramount, adopting HTTPS and HSTS support is not only a best practice but also an SEO advantage. Secure websites not only protect user data but also enhance user trust and satisfaction, indirectly influencing SEO rankings. As search engines continue to prioritize security, it’s essential for website owners to stay ahead by prioritizing HTTPS and considering HSTS implementation. The combined effect of HTTPS and HSTS on SEO is a win-win situation, benefiting both website owners and their visitors.

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