Server-Side Rendering vs Client-Side Rendering: Which Is Best for SEO

Are you planning to create a website from the ground up? Successfully implementing one requires considering numerous factors, including the critical choice between server-side vs client-side rendering. Since page rendering significantly influences both user experience and SEO, it’s essential to grasp the advantages and disadvantages of each method, particularly when to use server-side rendering vs client-side rendering.

This article dives deeper into these concepts, offering a thorough client-side vs server-side rendering comparison to help you make an informed decision about the best rendering method for your needs.

Client-Side vs Server-Side Rendering Explained

Rendering is the process by which HTML, CSS, and JavaScript are transformed into visual content displayed in the browser, as explained in documentation describing how browsers render webpages to create the webpages that users view. The specific rendering approach used dictates how your browser retrieves, handles, and presents the page after you enter a URL. They are broadly divided into two main categories: server-side rendering and client-side rendering.

Client-side rendering refers to the process where the browser uses JavaScript to build the HTML content and user interface elements directly on the user’s device. In contrast, server-side rendering generates the content on the server and delivers the fully rendered page to the user’s browser, without relying on JavaScript execution on the client side.

Client-side rendering process | Source: 

With client-side rendering, when a user accesses a URL, the server responds with a basic HTML file. The browser then uses JavaScript to retrieve the necessary data from the server and display the full content on the page. Therefore, when should to use client-side rendering? This approach is best suited for developing dynamic websites and single-page applications where content is frequently updated. To improve performance in CSR, it’s essential to eliminate render-blocking resources by optimizing JavaScript and CSS delivery. Using tools like lazy-loading and deferred scripts can enhance load times and overall user experience.

Server-side rendering process | Source: 

In server-side rendering vs client-side rendering, the former is the most common approach, which has been widely used over the years. As the webpage contents are generated on the server, this technique is well-suited for static web applications, such as e-commerce platforms, landing pages, etc., where SEO and page load speeds are important.

Implementing a Content Delivery Network (CDN) can further optimize SSR by ensuring faster delivery of assets to users across different geographic regions. One of the key CDN benefits is reduced latency, which contributes to quicker initial loads and improved search engine rankings.

Client-side rendering: Pros & Cons

Before deciding when to use client-side rendering, let’s start by understanding the pros and cons offered by this approach.

Client-side rendering: Pros

• Minimal server load

In a server-side vs client-side rendering comparison, client-side rendering handles most of the UI rendering within the browser, while the server delivers only a basic HTML structure. This approach reduces server workload and can lead to quicker page load times.

• Rich user experience

Among the key benefits of client-side rendering is its ability to deliver a highly interactive and dynamic browsing experience for users. This allows users to view updated content instantly without needing to refresh the entire page.

• Improved Conversions

CSR offers a dynamic web experience that influences the user journey, making them stay longer. This often leads to higher conversion rates that can indirectly help improve SEO rankings.

Client-side rendering: Cons

• Longer initial loading time

One of the cons of CSR is its longer page loading times when compared with SSR. This happens because the client browser has to download all the required JavaScript files before rendering. Until it gets done, users will see a blank page. Implementing code splitting and lazy-loading strategies can reduce initial server response time.

• Crawling & indexing problems

In the initial page load, the server only provides a minimal HTML content version, and the rest has to be rendered by the client side. This situation makes it difficult for crawlers to understand the webpage contents of the pages properly and index them.

• Caching is dependent on JavaScript

With client-side rendering, the browser is unable to completely cache the page content until the JavaScript has finished running and the interface is fully loaded. This significantly affects performance, particularly for users who have slower devices or unreliable network connections.

Server-side rendering: Pros & Cons

Now that you are aware of the perks of CSR, let’s dive into the benefits of server-side rendering and see how it has become the widely used rendering technique. 

Server-side rendering: Pros

• Improved page loading experience

With server-side rendering, most of the work to process and generate the page happens on the server, so loading screens are unnecessary. Users get the complete content immediately without having to wait for JavaScript to load and run. This offers an instantaneous loading experience without delay, hence why businesses prefer them in a client vs server-side rendering comparison.

• Increased performance on slower devices

As most of the heavy lifting is done by the server, the client side requires only minimal power to browse the site. Hence, an SSR approach is favourable for devices with slower network connections

This makes it one of the best benefits of server-side rendering.

Server-side rendering: Cons

• Overwhelming load on the server

A drawback of server-side rendering is the higher demand it places on the server, as it must render the full webpage for every user request. This situation is more common for websites with high traffic or if multiple users are simultaneously requesting access.

• Less dynamic interactions

In the client-side vs server-side rendering scenario, CSR trumps SSR in terms of interactivity. Since the server performs all rendering, any site updates necessitate communication between the client and the server. This can cause delays and unresponsive UI issues.

Major Differences between client-side vs server-side rendering

If you thought that the major difference between client vs server-side rendering is its rendering process, that is just one of the many factors. There are several factors where both approaches differ, and we have compiled a list of them so that you know.

Feature	Client-side rendering	Server-side rendering
Initial Page Load Time	As the web contents are loaded on the client-side browser, this results in a slower initial page load time.	Faster page loading times as the HTML content is rendered fully on the server.
SEO	Struggles with indexing pages as they encounter minimal HTML content on the initial pass.	No indexing issues, as the crawlers see the fully rendered HTML content by the server on the first pass.
User Engagement	Users may abandon the page if it takes too long to load or is broken.	Quicker page loads contribute to reduced bounce rates & increased engagement.
HTTP requests	With data processing handled on the client side, fewer HTTP requests are sent to the server.	The server pre-renders all the webpage content for every request; hence, it requires more HTTP requests.
Server load	Since the heavy lifting of rendering occurs on the client’s end, the server only needs to deliver the initial page, resulting in minimal server load.	As the complete website is rendered on the server side, this results in increased load.

Server-Side Rendering vs Client-Side Rendering: The Better SEO Option

Now that you have learnt both rendering techniques, the most obvious question remains: which is the best option for SEO? That depends on your project goals, audience preferences, and SEO requirements. To make things clearer, let’s understand the scenarios when to use server-side rendering vs client-side rendering.

You should use SSR in the following cases:

• Your site relies on SEO & organic traffic
• You want faster page load times.
• Your site has mostly static content pages
• Your site should load quickly on older devices or slow networks

So, when to use client-side rendering?

• You’re building a highly interactive website.
• You want to implement seamless transitions between webpages.
• You prefer that user interactivity is important than initial SEO performance

To gain a complete grasp of their respective advantages and disadvantages, it’s beneficial to perform a server-side vs client-side rendering comparison. Server-side rendering is all about providing faster page loads, faster crawlability and indexing, and improved user experience. This makes it ideal for websites with static content that does not change frequently.

Whereas in client-side rendering, the processing is done by the JavaScript code on the client side that offers an interactive user interface. CSR is all about providing a rich user experience, engagement and interactivity, and is best suited for websites that update their content frequently. Despite the perks, both approaches have their trade-offs, which should be understood to make a better-informed decision.

Do you wish to learn about client-side vs server-side rendering? GTECH Information Technology will assist you in that aspect, providing innovative insights and advanced digital marketing services and web development solutions. Our team helps you choose the best rendering strategy that enhances your site performance, SEO, and user experience goals.