How to Speed Up a WPBakery Site Without Rebuilding It

WPBakery has been around for years, and it still ships bundled with a lot of premium themes. If you bought a theme from ThemeForest at some point, chances are it came with WPBakery baked in. Somewhere along the way, it also picked up a reputation for making sites slow.

There’s some truth to that. But here’s what most people get wrong: you rarely need to rebuild the whole thing in another builder to fix it. Usually the problem isn’t WPBakery. It’s how the site gets delivered to visitors.

And that part you can fix in a few minutes, without touching a single page.

Why WPBakery sites feel slow

It helps to know what’s actually going on before you try to fix anything.

WPBakery loads its own CSS and JavaScript so all those rows, columns, and elements render the way you designed them. The browser has to work through those files before it can paint the page, and that pushes back the moment your visitor sees anything.

Images are another common culprit. WPBakery makes it far too easy to drop a full-resolution photo into a background or an image element. That 4MB hero shot gets pulled down in full on every visit, and more often than not it’s the heaviest thing on the page by a wide margin.

Caching is the other big one. When there’s no caching in place, WordPress builds the entire page again for every single visitor. It queries the database, runs the PHP, stitches together the HTML, and loads all those shortcode assets from scratch each time. That’s a lot of wasted work, and your visitors wait through it. Plugin-level caching handles this without any server configuration, and it often holds its own against server-side caching like NGINX or Varnish.

Addons pile on top of this too. If your theme bundles extra WPBakery elements, or you installed an addon pack for one specific slider, you can end up loading CSS and JS for things that aren’t even on the page.

None of this is really about the layout you built, though. It all comes down to how the page is processed and served, which happens to be the part you can fix without rebuilding anything.

What you don’t need to do

Let’s get the scary stuff out of the way first, because the usual advice makes this sound like a weekend-eating project.

You’re not rebuilding your pages in another builder. You’re not editing your theme’s CSS by hand. No separate CDN account to set up, no .htaccess file to wrestle with, no Critical CSS to generate manually. The fix below doesn’t touch your content or your database at all. Your pages stay exactly as they are. Only the delivery changes.

What you actually want is a performance layer that sits in front of your WPBakery site and handles caching, image optimization, Critical CSS, and CDN delivery for you. That’s FastPixel.

The one-plugin fix: FastPixel

FastPixel is an all-in-one WordPress performance plugin from the ShortPixel team. It takes care of caching, image optimization, CSS/JS Optimization, Critical CSS, CDN delivery, and more, all from a simple interface.

It’s built to work out of the box. Rather than making you dig through dozens of caching and optimization settings, you activate the plugin, pick the Fast preset, and let it handle everything from there.

For a WPBakery site, that mix does a lot of good:

• Caching stores optimized versions of your pages, so WordPress doesn’t have to rebuild them from scratch for every visitor. That’s exactly the overhead that drags shortcode-heavy builders down.
• Image optimization compresses your images, serves them as WebP and AVIF, and resizes them to the visitor’s screen. No more 4MB backgrounds.
• Critical CSS pulls out the styles needed for the top of the page and inlines them, then defers the rest. The browser can start painting right away instead of waiting on WPBakery’s stylesheets.
• CDN delivery comes built in, so assets load from somewhere close to each visitor rather than from one origin server.

You don’t set any of these up one by one, either. The whole thing really is three steps.

Step 1: Activate the plugin

Install FastPixel from your WordPress dashboard like you would any other plugin, then activate it.

That’s it for this step. No DNS to change, no nameservers to repoint, no separate account to configure before your site is covered. The moment it’s active, FastPixel starts working with your site as it already is.

Step 2: Choose the Fast preset

Open the FastPixel settings and pick the Fast preset.

The presets bundle FastPixel’s CSS and JavaScript optimization into a single choice, so you don’t have to make sense of every individual toggle. Fast applies a balanced set of optimizations that suits most WPBakery sites well. There’s no need to tweak dozens of performance settings yourself, FastPixel applies the recommended ones for you.

Choose Fast, save, and let it take over from there.

Step 3: Confirm your pages show green “Cached” status

This final step confirms that FastPixel has finished optimizing your pages.

Once FastPixel is on, your pages get processed automatically in the background. You can watch their status right from the FastPixel dashboard. When a page turns green and reads Cached, it’s ready, it’s now being served as an optimized, cached version instead of getting rebuilt on every visit.

Keep an eye on the pages that matter most: your homepage, your main landing pages, your popular posts. Once those are all showing green, you know your optimization is live.

A few things to check after setup

FastPixel does the heavy lifting, but a couple of quick checks help you get the most from it.

Test before and after. Run your key pages through Google PageSpeed Insights or GTmetrix before you turn FastPixel on, then again once they’ve cached. Do a few runs and go by the average rather than one score, since results move around a bit on their own. Keep an eye on Largest Contentful Paint and Total Blocking Time especially, those are where WPBakery sites usually struggle, and where caching and Critical CSS make the clearest difference.

Then just browse your site for a minute. Click through your key pages and confirm everything looks the way it should. It’s a quick check, and it’s worth doing after any performance optimization.

One more thing worth knowing: if you edit a page later, FastPixel refreshes its cache on its own. Your changes show up without any manual work on your end.

Conclusion

WPBakery’s slow reputation isn’t really about the builder. It comes down to caching, images, and render-blocking assets, and every one of those is a delivery problem, not a layout problem.

So no, you don’t have to rebuild your WPBakery site to make it fast. Activate FastPixel, choose the Fast preset, wait for your pages to go green, and you’re done.