I had lunch with a trusted SEO partner last Friday. A team we’ve worked with for over 8 years that we trust, a solid agency who know their stuff. At some point the conversation moved to implementation and he said:
“Your sites always rank faster than the ones we get from other agencies. Noticeably faster.”
I asked him what he thought the reason was. He said he wasn’t entirely sure, but he’d noticed it consistently across multiple clients. We talked about it for a while, and by the end of lunch we’d landed on the same conclusion: it’s how the sites are built from the ground up.
Is HTML Better for SEO Than JavaScript-Built Sites?
The short answer is yes, in most cases — and it’s the core reason I’ve always insisted on building clean, server-rendered HTML rather than relying on JavaScript to assemble pages in the browser.
When a visitor lands on a page, the content can arrive in one of two ways. Either the server sends a fully formed HTML document — headings, text, structure all present from the start — or it sends a JavaScript framework that fetches and builds the content after the page loads. The first is server-side rendering. The second is what powers most Wix, Squarespace, and AI-built sites.
Google can technically read JavaScript. It even says so. But the reality is messier. Google uses a two-wave indexing process: it crawls pages quickly on the first pass, then queues JavaScript-heavy pages for a second, deferred render. That queue can take days or weeks. During that window, content isn’t indexed, new pages sit waiting, and updates take longer to register.
A server-rendered page sidesteps all of that. Google reads it on the first pass — no queue, no delay.
How Google Actually Reads Your Pages
I think a lot of business owners assume Google sees their website the way a visitor does. It doesn’t. Google’s crawler is essentially reading source code, and how that source code is structured has a direct bearing on how quickly and reliably your content gets indexed.
Google’s own documentation acknowledges that JavaScript rendering is handled as a secondary process. For most websites this means slower indexing and less reliable content discovery — particularly for new pages or frequently updated sections. It’s one of the reasons our website optimisation service always starts with a look at the build quality before touching anything else.
Core Web Vitals matter here too. Google measures how quickly a page loads and becomes interactive, and these scores are a direct ranking factor. A JavaScript-rendered page serving a large bundle before any content appears will nearly always score worse than a lean HTML page. Faster pages rank better and convert better — it’s genuinely worth caring about.
AI Crawlers Don’t Wait Around
Google’s two-wave system is already a problem. But there’s a newer challenge I’ve been paying close attention to: AI-powered search tools — ChatGPT, Perplexity, ClaudeBot and others — are increasingly crawling the web to answer user queries directly.
Most of these crawlers don’t execute JavaScript at all. They read raw HTML, extract structured content, and move on. If your page relies on JavaScript to render its text, those crawlers may see nothing useful.
I wrote about this in more detail in our post on how AI search engines work, and we’ve also looked at whether AI will replace search engines in a broader sense. The short version: AI visibility is becoming as important as Google visibility, and server-rendered HTML gives you a head start on both fronts.
Where DIY AI Builders Fall Down
I’ll be honest — the new wave of AI website builders is genuinely impressive on the surface. Fast, cheap, looks professional within minutes. I understand the appeal.
But looks and performance are different things. These platforms are built on proprietary JavaScript stacks with limited control over how content is served. Some render accessible HTML in certain areas and JavaScript-rendered content in others, which creates inconsistency that’s difficult to diagnose and harder to fix.
There’s also a longer-term cost that doesn’t show up in the monthly subscription fee: slower indexing, weaker Core Web Vitals, reduced AI search visibility, and an architecture you can’t change without rebuilding from scratch. We explored a similar point in our post on replacing SaaS tools with purpose-built solutions — the cheap option often isn’t, once you factor in what you can’t do.
How We Build Sites at Webshape
Every site I build at Webshape starts with clean, server-rendered HTML. No JavaScript dependencies serving your headings. No render queues. No template bloat slowing your Core Web Vitals down.
We hand-code the HTML ourselves — working in WordPress with custom PHP templates and ACF field structures — so the output is lean, structured, and immediately readable by Google and AI crawlers alike. There are no shortcuts in the foundation.
If you’re already live on a platform-built site and wondering why rankings aren’t moving the way you’d expect, the answer is often in the code rather than the content. Our website health check is a good place to start — we look at how your pages are actually rendering, not just how they appear on screen.
→ Get a free website health check
Frequently Asked Questions
What is the best website platform for SEO?
There’s no single platform that wins by default — what matters is how the site is built. Server-rendered HTML, clean code, fast load times, and a logical page structure consistently outperform JavaScript-heavy platforms in Google rankings and Core Web Vitals scores.
Does Google penalise JavaScript websites?
Not explicitly, but it processes them more slowly. JavaScript-rendered pages go into a deferred queue and can take days or weeks longer to index compared to server-rendered HTML pages, which Google reads on the first crawl.
Can Wix or Squarespace rank well on Google?
Some do, particularly on low-competition terms. But both platforms have structural limitations around server-side rendering and technical customisation that make it harder to compete at scale or in more competitive markets.
Why does server-side rendering matter for SEO?
Because Google can read the page immediately, without waiting for JavaScript to execute. That means faster indexing, more reliable content discovery, and better performance scores — all of which feed into rankings.
Will AI search engines affect my website rankings?
Increasingly, yes. Tools like ChatGPT and Perplexity crawl the web to answer queries, and most don’t execute JavaScript. A JavaScript-rendered site may be effectively invisible to them, which matters more and more as AI-powered search grows.
How do I know if my website is server-rendered or JavaScript-rendered?
Disable JavaScript in your browser and reload the page. If the content disappears or breaks, it’s client-side rendered. Google Search Console’s URL Inspection tool will also show you what Googlebot actually sees when it crawls your pages. Our website health check will flag this too.
