Your site stays on Wix. A DNS change routes traffic through WebSpeed, which optimizes each page on its way to the visitor — nothing is installed, and the editor keeps working as it does now. That route matters here, because Wix gives you no server, no build step and no access to the markup it emits, which is why most Wix speed advice ends at "use fewer apps". We measured what is actually on the critical path across 30 Wix sites; the same four things came back on every one of them.
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Each one is independent and can be switched off for your domain — nothing here is all-or-nothing.
Blocking scripts are deferred and inline body scripts are held until rendering is done, then run in order. Same behaviour, out of the way of the first paint.
The origins your page genuinely uses get their DNS, TCP and TLS work started early, so the fetch itself is all that's left when the browser gets there.
The largest above-the-fold image is preloaded at high priority; everything below the fold waits until it approaches the viewport.
Below-the-fold sections are skipped until they're needed, so a long page costs about what its first screen costs.
We read each image's true aspect ratio server-side and write it into the markup, so the browser reserves the right box before the file lands and the text stops jumping.
Maps, videos and social embeds stop loading their whole third-party payload with the page and wait until the visitor scrolls near them.
An optimization you cannot undo is a risk, not a feature. Each of these is a decision you keep after the site is live on WebSpeed.
Each one is independent. If something doesn't suit your Wix theme, it can be disabled for your domain alone and everything else keeps working.
On a tuned profile we measure each optimization against your own pages and drop the ones that do not earn their place there.
Your audit page re-runs both measurements on demand, so "did it help" stays a number you can pull rather than a claim you have to take.
WebSpeed sits in front of your site, not inside it. Revert the DNS record and your original site serves again, unchanged — nothing to uninstall.
In progress: a dashboard where you flip these yourself and follow each page's scores over time. Today it is a message to us and we apply it to your domain.
Measured, not assumed — this is what our filter logs recorded across the Wix sites we have audited, ranked by how many of them had something to fix.
Measured across 32 Wix audits · snapshot 2026-09-09
97%of sites
Not a handful of Wix sites — 31 of the 32 we audited had scripts the browser had to stop and run before it could carry on building the page. On a phone, each one is dead time on a screen that is still blank.
97%of sites
Script blocks sitting in the body execute as the browser works through the markup, so drawing stops every time one runs. This is the platform's own runtime and the apps you added, not something you can reorder in the editor.
97%of sites
Wix serves your page from one origin and its media, fonts and app code from several others. The browser only discovers those the moment it needs them, then pays for DNS, TCP and TLS before a single useful byte moves.
100%of sites
Layout and paint run over the full length of the page before anyone has scrolled. On a long Wix page most of that rendering cost is spent on sections the visitor may never reach.
Stored audits — the original page against the same page served through WebSpeed, on mobile and desktop. Not a demo build: these are the sites as they ship.
Real Google Lighthouse audits, original vs. WebSpeed Fast. The ring is the mobile PageSpeed after; “faster” is the Speed-Index ratio; “lighter” and CO₂ (≈0.15 g/MB per visit, Sustainable Web Design v4) come from the measured byte reduction. SEO / conversion / bounce are projections from the measured LCP improvement, not guarantees. Scores are per-page; yours will differ.
* Core Web Vitals are a Google ranking signal; the biggest lift is leaving the “Poor” zone (score < 50), scaled here by device search share.
** Akamai / SOASTA (2017): a 100 ms delay cost 7% of conversions across ~10 billion retail visits; scaled here to the measured improvement.
*** Akamai / SOASTA (2017): a two-second delay raised bounce rate by 103%; scaled to the measured improvement, site-specific.
Core Web Vitals have been a confirmed Google ranking signal since 2021. The biggest win is leaving the "Poor" band, where faster competitors get preferred.
— Google Search CentralConversion tracks load time closely — on Akamai’s retail numbers a delay of just 100 ms cost 7% of conversions. Shaving seconds is the cheapest funnel work available.
— Akamai / SOASTA, 2017Close a two-second gap and bounce rate roughly halves — Akamai measured those same two seconds raising it by 103%. A page that paints early keeps the visit a slow one loses outright.
— Akamai / SOASTA, 2017Transfer weight maps to emissions at roughly 0.15 g of CO₂ per MB. Cutting bytes is the one optimization that shows up on a sustainability report.
— Sustainable Web Design v4Each figure links to the page that publishes it. The studies measure what delay costs; read here as what speed returns. Industry benchmarks, not a guarantee for a specific site — the per-site numbers are the audits above, and yours is a free check away.
Search for Wix speed advice and you find the same three suggestions: install fewer apps, compress your images, turn on Wix’s own optimizer. That advice exists because it is the only advice a Wix owner can act on — not because it is where the time goes.
We measured instead. Across 32 audited Wix sites, four things were true of essentially every one of them, and none of the four is reachable from the editor.
JavaScript is the story on Wix, not CSS. 31 of the 32 sites we audited shipped scripts that block the parser, and 29 had inline scripts executing while the page was still being drawn. That is a different picture from WordPress, where the most common defect we record is a render-blocking head full of stylesheets. On Wix the stylesheets are comparatively tidy; it is the script work that fills the critical path.
Images are a smaller problem here than elsewhere. Wix serves modern formats from its own CDN, and it shows in our logs: we found images missing dimensions on about half the sites, against nine in ten on Webflow. Where Wix leaves room is not the file format — it is priority and ordering.
Wix is the most closed platform we audit, and that is usually described as a limitation of support. It is really a limitation of operations.
Speeding up a page is mostly deferring, reordering and dropping things the platform already emits. Those verbs need access to the markup. On Wix you cannot defer a script the runtime injected, reorder tags you did not write, or drop a connection hint that belongs to an app. So every honest Wix speed guide ends in the same place: use fewer apps, and wait for the platform.
A reverse proxy moves where the work happens. Your Wix site keeps serving the page it always did; WebSpeed receives that page, rewrites its critical path, and hands the result to the visitor. Nothing inside Wix changes, so there is nothing for a platform update to undo and nothing for your team to relearn.
Wix is a harder platform for us than a brochure-style builder, and we would rather you heard that here than discovered it in your own numbers. A large share of a Wix page is drawn by client-side JavaScript, and the more of the page the platform’s own runtime draws, the less there is for us to reorder. Our Wix results are real but more modest than the headline figures elsewhere on this site, and a minority of sites come out flat.
That is exactly why the check is free and takes a minute. You get your own number rather than our average.
It needs nothing but the URL:
No — that is the point. WebSpeed runs in front of your existing site. You keep the editor, the hosting, the apps and your workflow; only what the browser receives changes.
Yes. We never touch the site inside the platform. Your team keeps editing in Wix exactly as before, and every publish flows through unchanged.
Our measurements agree with them on part of it — Wix serves modern image formats and its own CDN, and our image-format work finds less to do here than on self-hosted platforms. What we still measured on nearly every site we audited is the JavaScript on the critical path: scripts that block the parse, and inline scripts that run while the page is drawing. That is what the gains come from.
No, and on Wix you largely could not: the usual route is the proxy, where traffic is routed through WebSpeed with a DNS change and nothing is installed anywhere.
It should not — every optimization here is about when and in what order things load, not about what they are. The audit shows you the before and after so you can check the result yourself before deciding anything.
The before/after check is free to run; it isn’t one of these plans. Choose a plan when you’re ready to make the speed-up permanent — or buy the report once and apply it yourself.
Subscriptions start with a 14-day free trial (Fast and Growth), then run for a minimum of 6 months — you commit only after the trial. Fast is priced by monthly visits; indicative launch pricing.
Buy the Audit once and apply it yourself — the same findings the pipeline acts on, written up as instructions.
Paste your URL for a free PageSpeed comparison on mobile and desktop. No signup, about a minute.
That doesn’t look like a website address. Enter a domain — for example example.com or https://example.com/page.
No signup. See your before/after PageSpeed score in about a minute.
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