Next.Js Server-Side Rendering Static Site Generation

Jhansi Pothuru

Wed Sep 27 2023

Jhansi Pothuru

In the ever-evolving world of web development, two buzzwords you're likely to come across are Server-Side Rendering (SSR) and Static Site Generation (SSG). Both of these techniques are powerful ways to build web applications with Next.js, a popular React framework. But how do you decide which one is right for your business?

In this blog, we'll break down the pros and cons of SSR and SSG in Next.js to help you make an informed choice based on your specific needs.

What's the Difference Between SSR and SSG?

Before diving into the comparison, let's clarify what SSR and SSG actually mean.

Server-Side Rendering (SSR): With SSR, web pages are generated on the server and then sent to the client. This means that when a user requests a page, the server processes the request, fetches the necessary data, and generates the HTML on the fly before sending it to the browser.

Static Site Generation (SSG): In contrast, SSG generates HTML pages during the build process, not at runtime. This means that the HTML for all pages is pre-rendered before your site goes live, and each user receives a pre-rendered page when they visit your site.

Now, let's explore the advantages and disadvantages of each approach:

Pros and Cons of Server-Side Rendering (SSR):


1. SEO-Friendly: SSR is excellent for SEO because search engines can easily crawl and index your pages. The content is available in the initial HTML response, making it accessible to search engine bots.

2. Dynamic Content: SSR is ideal for websites with frequently changing data, such as news sites or e-commerce platforms. Users always see the latest content.

3. Improved User Experience: Since the server initially renders the page, users get a faster initial load and can start interacting with your website sooner.


1. Slower Initial Load: While SSR offers a faster time to the first byte, the initial load can be slower compared to SSG because the server needs to generate the HTML dynamically.

2. Server Load: Handling SSR can put a significant load on your server, especially during traffic spikes, which may require additional resources.

Pros and Cons of Static Site Generation (SSG):


1. Blazing-Fast Loading: SSG delivers pre-rendered HTML pages, resulting in lightning-fast initial loads. Users see content almost instantly.

2. Cost-Effective: Static sites can be hosted inexpensively since there's no need for server-side processing or databases.

3. High Scalability: SSG sites can handle traffic spikes effortlessly, thanks to their cacheable nature and reduced server load.


1. Limited Real-time Data: SSG is not suitable for websites that require real-time data updates because the HTML is generated during the build process.

2. SEO Considerations: While SSG is generally SEO-friendly, it may require extra effort for dynamic content updates or metadata management.

When to Choose Server-Side Rendering (SSR)?

1. Real-Time Data: Opt for SSR when your website relies heavily on real-time data. This includes applications like stock market dashboards, messaging apps, or collaborative tools where the latest information is critical. SSR ensures that users always see up-to-date content.

2. Interactivity: If your web application requires a high level of interactivity, such as live chats, online gaming, or real-time collaboration features, SSR is the way to go. It allows for dynamic updates and instant user interactions.

3. Frequently Changing Content: SSR is ideal for websites with content that changes frequently. News websites, social media platforms, and e-commerce sites that frequently update product listings benefit from SSR's ability to serve the latest information on every request.

4. Personalization: If your site offers user-specific content or personalized recommendations that change with each visit, SSR can dynamically tailor the content to each user.

Suggested: Next.js vs Nuxt.js vs Gatsby: Key Features and Differences

When to Choose Static Site Generation (SSG)?

1. Blazing-Fast Performance: Choose SSG when you prioritize speed and want a website with lightning-fast initial load times. This is especially crucial for ensuring a smooth user experience, reducing bounce rates, and improving SEO.

2. Lower Hosting Costs: SSG can significantly reduce hosting costs because it doesn't require server-side processing. This makes it an excellent choice for startups and small businesses with budget constraints.

3. High Scalability: SSG websites can handle traffic spikes without breaking a sweat. If your website experiences fluctuating traffic levels or expects sudden surges in visitors, SSG is a reliable choice.

4. Content-Focused Platforms: SSG shines when your website primarily serves content, such as blogs, news sites, portfolios, or marketing pages. Content can be pre-rendered during the build process, ensuring speedy delivery to users.

5. Improved Security: Since there's no server-side code execution in SSG, it can offer enhanced security by reducing potential attack vectors. This is important for websites that handle sensitive information.


In the SSR vs SSG breakdown, there's no one-size-fits-all answer. Your choice should align with your specific business needs. Consider your content, interactivity, SEO requirements, and budget when deciding between Server-Side Rendering and Static Site Generation with Next.js. By making an informed choice, you can ensure that your web application performs optimally and meets your users' expectations.

Remember, Next.js offers the flexibility to mix and match these approaches within a single application, allowing you to harness the best of both worlds. Evaluate your priorities, and your website will grow, no matter which path you choose to take

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SSR vs SSG in Next.js

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