New: AI driven optimization with reports on Agentic Browsing gaps too.
AI engine Agentic Browsing Why speed matters Why us How it works Pricing FAQ
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AI powered optimization · one script in your <head>

Make your site faster for humans. Readable for agents. Without touching your code.

Website Speedy works out how your pages should load: what to defer, what to paint first, what to hold back. It applies that on every visit and re-tunes itself as your site changes. That work is graded twice now, because PageSpeed Insights scores your pages for agents as well as people.

// speed score, Core Web Vitals and agent readiness in about 30 seconds. No signup.

★★★★★ Rated 5 stars across Trustpilot, Capterra and G2 · 20,000+ sites
Works on
pagespeed_insights.report · bigbuda.ca after Website Speedy
Performance · scored 0 to 100
96
Mobilewas 30
99
Desktopwas 65
0.039
CLSwas 0.457

Agentic Browsing

0/3→3/3
✓ Layout stability (CLS) fixed for you
! Accessibility tree audit + fix list
! llms.txt audit + fix list
One click integrations for every major platform
What you get

A faster site pays you back in six ways

Four of them you already know. Two of them did not exist eighteen months ago, because your page now has a third audience: software acting on a person's behalf.

For people ↑

More conversions

Faster pages mean fewer drop offs between landing and checkout, so more of the traffic you already pay for turns into orders.

For people ↓

Lower bounce rate

Visitors leave slow pages before they load. A quicker first paint keeps them on the site long enough to engage.

For search SEO

Stronger rankings

Core Web Vitals (LCP, INP and CLS) are a confirmed part of Google's ranking systems, and a real edge when you and a competitor are otherwise close.

For ads ROAS

Better ad efficiency

Google and Meta reward fast landing pages with lower CPC and CPM, so the same ad budget reaches further.

For agents CLS

Agents click the right thing

Agents screenshot pages and calculate click targets. A layout that jumps mid read makes them tap the wrong button, or give up. Layout stability is one of the three checks Google's Agentic Browsing category grades.

For agents Accessibility Tree

Agents can read your page

Agents parse the accessibility tree rather than your visuals, because it is far cheaper than reasoning over raw HTML. Unlabelled buttons and images of text are invisible to them. Website Speedy audits your tree and hands you the exact fix list.

What's new · live now

The optimization is decided by a model now, not by a fixed rule set

Every site is a different mess. The old engine applied the same optimizations to every page and hoped the defaults fit. The new one works out what your pages need, then keeps adjusting by analyzing your real visitors.

Before

One rule set, applied identically to your homepage, your collection pages and your checkout. Tuned once, by hand, if at all.

Now

A strategy chosen for your specific site, informed by what your real visitors experienced last week. It gets better without you touching anything.

01

It picks a strategy per page type

A product page, a blog post and a filtered collection page fail for completely different reasons. The engine reads the structure of each template and decides what to defer, what to hold, and how aggressive to be, instead of applying one global config.

// why it matters: aggressive defaults break some pages and under serve others
02

It identifies your critical content with a model

Working out which element is the LCP, and what genuinely has to be visible first, used to be guesswork baked into a fixed set of rules that treated every site the same. The model looks at the rendered page and identifies what the visitor came to see, so that gets painted first and everything else waits its turn.

// why it matters: LCP is the metric most sites lose their score on
03

It learns from real visitor data and re-tunes

Lab scores and field data disagree constantly. The engine watches what real visitors on real devices and connections actually experienced, then adjusts its own settings for your site. Add an app, redesign a template, run a sale: it re-tunes instead of decaying.

// why it matters: a one time config starts rotting the day it ships
04

It shows you where you fail the agentic checks, and how to fix them

For the parts that are not ours to fix automatically, the engine tells you exactly what an AI agent cannot use on your page: which controls have no label, which text is trapped in an image, which ARIA roles are invalid (ARIA stands for Accessible Rich Internet Applications), what your llms.txt is missing. Each one comes with the specific change to make, ranked by impact.

// pairs with the CLS fix, which is applied for you
The fifth score

PageSpeed Insights now grades your site for AI agents

Google added an Agentic Browsing category to Lighthouse 13.3 in May 2026, and PageSpeed Insights picked it up within two weeks. It sits next to Performance, Accessibility, Best Practices and SEO, and it asks one question none of those do: if an AI agent landed on this page with a task, could it understand the page and complete it?

pagespeed.web.dev · categories
94Performance
97Accessibility
100Best Practices
100SEO
2/3Agentic Browsing

// it reports a pass ratio, not a score out of 100
// it is marked "under development", so the audits will change
// it does not feed into your Performance or SEO score
// WebMCP, the fourth audit, reads "not applicable" in the PageSpeed lab

01

Layout stability (CLS)

Agents take screenshots and compute click coordinates. If your layout shifts while they are reading it, they click the wrong element or abandon the task. Same metric as Core Web Vitals, now with a second job.

Website Speedy fixes this automatically
02

Accessibility tree

Checks that interactive elements carry programmatic labels, that ARIA roles (Accessible Rich Internet Applications, the labels that tell software what an element is) are valid, and that every clickable thing has text an agent can reference. A site can score 100 on SEO and still fail this, because an unlabelled <div onclick> simply does not exist to an agent.

We tell you what is broken and how to fix it
03

llms.txt at your domain root

A hand authored map of your site: what it is, what matters, where to read more. Without it, an agent reverse engineers your structure on every single visit. Missing entirely, malformed, or stuffed like a 2007 meta keywords tag: all three fail, and all three fail quietly.

We tell you what is wrong and exactly what to publish
// the honest version

We are not going to promise you a 3/3. Website Speedy fixes one of the three checks outright, layout stability, and that is the one most sites fail. The other two it diagnoses: for the accessibility tree it tells you which controls an agent cannot use and what to change, and for llms.txt it tells you what is missing or malformed along with exactly what to publish. Those fixes live in your markup and at your domain root, not inside a script that patches things at audit time. The category itself is young and explicitly experimental, so treat a green ratio as a signal that you are ahead, not as a ranking lever. What is not speculative: the same rendering work that lifts your Core Web Vitals is what makes your page legible to agents. You were always going to do it. It just counts twice now.

Real customer results

Before and after, on live stores

Real PageSpeed Insights scores from customer sites, measured before Website Speedy was installed and after.

discountelectronics.com BigCommerce
Before
45Mobile
81Desktop
→
After
73Mobile
97Desktop
LCP 2.5s to 0.1sTBT 3944ms to 12msCLS 0.878 to 0.231
abcaudio.co.uk Wix
Before
46Mobile
85Desktop
→
After
88Mobile
98Desktop
LCP 1.9s to 0.3sTBT 1580ms to 18msCLS 0.987 to 0.224
afterstory.co Shopify
Before
48Mobile
87Desktop
→
After
75Mobile
99Desktop
LCP 1.8s to 0.2sTBT 1340ms to 15msCLS 0.545 to 0.200
bigbuda.ca Webflow
Before
30Mobile
65Desktop
→
After
96Mobile
99Desktop
LCP 2.7s to 0.6sTBT 1530ms to 18msCLS 0.457 to 0.039
Illustrative example

What the agentic side of that looks like

The Agentic Browsing category does not return a score out of 100, so it does not belong in the same dial as Performance. It returns a pass ratio across three checks, and the honest version has three states rather than two: what you score today, what you score the moment you install, and what you score once you have shipped the fixes we hand you.

Before
0/3
x CLS 0.31, layout shifts
x 14 unlabelled controls
x no llms.txt at root
→
Day one, automatic
1/3
✓ CLS 0.02, stable
! 14 fixes listed and ranked
! llms.txt drafted for you
→
Once you ship the list
3/3
✓ CLS 0.02, stable
✓ controls labelled
✓ llms.txt published
Why speed matters

Google rewards fast sites. So do your customers, and now so do their agents.

Page speed used to shape two things: where you rank, and whether the visitor stays long enough to buy. There is a third now. Here is what the data actually says.

It is a real ranking signal

Core Web Vitals (LCP, INP and CLS) are a confirmed part of Google's ranking systems. They will not outrank great content, but when you and a competitor are otherwise close, the faster page wins.

A tiebreaker, not magic, but a measurable edge

It moves revenue, directly

Google's own web.dev case studies make the link plain. Rakuten 24 found that good LCP scores drove a 53% increase in revenue per visitor and a 33% lift in conversion rate.

+53% revenue per visitor, Rakuten 24, web.dev

The third audience is already here

Operator, Computer Use, Project Mariner, Perplexity and ChatGPT's browse mode visit sites on a person's behalf. A growing share of the requests hitting your server are software, and Google has now made their needs measurable in the same tool you already open every week.

Agentic Browsing, live in PageSpeed since May 2026

Want the full breakdown? Read Google's own guide to Core Web Vitals and search, or Chrome's Agentic Browsing scoring documentation.

// the shift in search

As AI answers more searches, every visit you earn is worth more

AI Overviews and assistants now handle a growing share of queries, which means fewer and higher intent visits reaching your site, some of them arriving as an agent working through a task rather than a person browsing. Website Speedy does not get you cited by AI. That is a different game, and anyone selling you both in one box is overselling. What it does is make sure that whoever arrives, human or agent, hits a page that renders fast and holds still long enough to be used. When traffic gets scarcer, wasting it gets more expensive.

"Isn't this just a CDN or a caching plugin?"

No, and on most platforms those are not even an option

CDNs and caching plugins make your page arrive faster. Website Speedy changes how the browser renders it once it gets there, which is the layer both Core Web Vitals and Agentic Browsing are actually measuring. Two different jobs, and which ones you can even use depends on your platform.

If you are on a hosted platform

You usually cannot run a caching plugin or a full CDN at all

Hosted platforms manage their own infrastructure, so you do not get the server access a caching plugin needs, or full control over a CDN layer. The standard speed toolkit is mostly off the table. Website Speedy works entirely from the front end, which is why it is a dependable option where those solutions cannot reach.

Shopify Wix Squarespace BigCommerce Webflow Ecwid HubSpot

→ For platforms like these, Website Speedy is the practical way to move Core Web Vitals, and the CLS check agents are graded on.

If you are on WordPress or custom hosting

You can run both, because they work on different layers

Already using a CDN or a caching plugin? Keep them. They handle delivery: edge servers, cached HTML, compression. Website Speedy handles what happens in the browser: render blocking CSS, third party script execution, load order, the largest visible element, and whether the layout holds still while it all arrives. It runs alongside your existing stack, not instead of it.

→ Complementary by design, so there is no need to remove anything you already use.

Q. "If my site is already cached and behind a CDN, why does it still score badly, for humans and for agents?"

Because caching and CDNs solve delivery, getting the same file to the visitor quickly. They do not change what the browser does next: waiting on render blocking stylesheets, executing heavy third party scripts before showing content, or loading every image at once and shoving the layout around as they land. That is the rendering layer, and it is where LCP, INP and CLS are won or lost. It is also, not coincidentally, where the agentic checks live. An agent does not care how fast your HTML left the edge, it cares whether the button is where it was two hundred milliseconds ago. Website Speedy works on exactly that layer, which is why it can still move your scores on a site that is already "optimized".

What it does CDN (for example Cloudflare) Caching plugin Website Speedy
Serves files from a closer or faster source Yes Partial Not its job
Caches and compresses your HTML and assets Partial Yes Not its job
Defers render blocking CSS in the browser No Limited Yes
Holds and async reinjects third party scripts No Limited Yes
Prioritizes the largest visible element (LCP) No No Yes
Stabilizes layout shift (CLS) No No Yes
Audits the accessibility tree agents read No No Yes, with a fix list
Works on locked down hosted platforms Limited Usually no Yes

// CDNs and caching plugins are good at delivery. Website Speedy is built for the rendering layer they do not touch, the one both Google and AI agents are grading.

"How is this different from the other speed apps?"

Most speed tools stop where the human audience stops

Optimizing images, deferring scripts and caching pages is a solved category with several good products in it. The gap is not there. The gap is that none of them tell you anything about the audience Google started grading in May 2026.

Capability Bundled speed apps (NitroPack and similar) Caching or optimization plugin Agency or developer retainer Website Speedy
Lazy loading, script deferral, asset optimization Yes Yes Yes Yes
Works on locked down hosted platforms Varies by platform Usually no Bounded by the platform Yes, front end only
Optimization strategy chosen per template by a model Preset profiles Manual config Manual, once Yes
Re-tunes itself from how real visitors experience the site No No Only if you pay again Yes
Reports your Agentic Browsing failures No No No Yes
Tells you what to publish in llms.txt No No If you brief them Yes
Ongoing cost after the work is done Subscription Subscription Hourly, every time Subscription, cancel anytime

// The speed rows are table stakes and we will not pretend otherwise. The agentic rows are where the difference currently sits.
// Competitor columns describe publicly documented feature sets at the time of writing. Verify before you rely on them, because this category moves quickly.

"Can't I just hire a developer for this?"

A developer covers the basics. Website Speedy goes further, automatically, and on every page load.

Hiring a dev to speed up your Shopify, Wix or BigCommerce store is real work and it helps. But it is a one time job with a hard ceiling, and that ceiling got lower the moment your page acquired a third audience that re-reads it on every visit.

A one off developer job

The static, structural fixes

Useful, visible work, the surface layer of a speed audit:

  • ✓Compress and resize images
  • ✓Remove unused apps and theme bloat
  • ✓Minify CSS and JavaScript files
  • ✓Tidy up the theme's Liquid or template code
  • ✓Defer a handful of known scripts by hand
Where the ceiling is
  • xIt is a one time snapshot that decays the next time you add an app or edit the theme
  • xIt is bounded by the platform, since a dev cannot restructure Shopify's own checkout scripts or app injections
  • xIt cannot adapt per page load, with no logic that reacts to what apps inject after the job is done
  • xLayout shift is the first thing to come back. One new app that injects a banner and your CLS, and your agentic check, regress silently
Website Speedy, a DIY tool

The same groundwork, plus the runtime layer

Everything a dev's checklist achieves, then the part they fundamentally cannot:

  • ✓Lazy loads images, iframes, scripts and CSS automatically
  • ✓Defers render blocking stylesheets and third party scripts
  • +Picks a strategy per template, so your product page and your blog get different treatment, decided by a model rather than one global config
  • +Runs on every page view and re-tunes from real field data, so optimization does not decay when you add an app
  • +Watches the DOM in real time, catching and deferring resources apps inject after load, before they shove your layout
  • +Holds the layout still, which is what keeps the agentic check passing month after month
  • +Audits the accessibility tree and your llms.txt, so your dev fixes the right five things instead of guessing
  • +Works where devs are blocked, since it is entirely front end and platform lock down is not a wall
No ongoing dev hours
  • ✓Set up once in about five minutes, with no code to maintain
  • ✓Manual expert review available if a site needs extra tuning
How it works

Three steps to a faster site, and what runs under the hood

Setup takes minutes. Behind the scenes, the engine applies eight loading optimizations that target the real reasons browsers feel slow, plus the layout instability that trips up agents.

1

Connect your site

Sign up, submit your key URLs, and add Website Speedy through your platform's app store or a single header snippet. No plugins, no refactor.

2

The AI works out your strategy

It reads each template, picks the right optimization profile, and applies it on every page view, then re-tunes as real visitor data comes back.

3

Your scores climb

Re-test on PageSpeed Insights, GTmetrix or Lighthouse. Most sites reach 90+ on desktop and 70+ on mobile, and your agent readiness report lands in the dashboard.

The eight levers the AI operates

These are the optimizations available on every site. What changes per template, how aggressively each one is applied and in what order, is what the engine decides for you.

01
Lazy loading everything

Images, iframes, videos, scripts and stylesheets load only when needed, as the visitor scrolls toward them, with space reserved so nothing jumps.

// stops the browser downloading the whole page at once
02
Render blocking CSS deferral

Stylesheets that force the browser to wait are delayed, so content appears first and full styling follows.

// visitors stop staring at a blank screen
03
Third party script deferral

Analytics, tag managers and pixels are held back, then reinjected with async so they never block first paint.

// other people's code stops slowing your page
04
LCP focused prioritization

The main visible element is identified so the browser can paint it first, holding other media back briefly.

// the thing that matters most shows up first
05
Layout shift containment

Dimensions are reserved for deferred media and late injected elements, so content does not jump as the page fills in.

// CLS stays low, for readers and for agents
06
Real time resource interception

A MutationObserver watches the page build. New scripts or images injected mid load are caught and held back.

// nothing sneaks in to bloat the initial load
07
Interaction based loading

Nothing extra loads until the visitor scrolls, taps or moves the mouse. That first interaction triggers the rest.

// the page stays light until someone uses it
08
Agent readiness audit

Your accessibility tree is scanned for unlabelled controls, invalid ARIA and images of text, and your llms.txt is checked for structure and validity. Both are reported as a ranked fix list in the dashboard.

// we find them and write the fix, you ship it
⚖

A note on testing integrity: testing tools, search engines and AI agents all expect to get the same page a real visitor gets. Everything above changes how resources load for everyone. It never shows a tester or a bot a different experience than a customer. That is also why we report accessibility tree problems rather than patching labels at runtime, because a label that only exists during an audit helps nobody.

Live in about five minutes

No build step. No plugins to maintain. No code to rewrite. If you would rather not touch the header yourself, the support team will set it up for you.

  • Sign up, or add the app from your platform's app store
  • Install the script provided
  • Website Speedy handles the rest, automatically
your site header
<!-- Paste once into your site header. -->
<script src="https://cdn.websitespeedy.com/ws.min.js" async></script>
<script src="https://cdn.websitespeedy.com/ws-agent.min.js" defer></script>
<script>window.wsKey = "YOUR-SITE-KEY";</script>

// from here, the browser will:
//  lazy load images, iframes, scripts and CSS
//  defer render blocking stylesheets
//  hold third party scripts, then async reinject
//  prioritize the main visible element
//  reserve space so the layout never jumps
//  wait for first interaction to load the rest
Pricing

Flexible plans for every business

Every paid plan includes the full AI optimization engine and the agent readiness report. Plans differ on monthly page views and support, not on which optimizations you get.

1 month free on yearly
Bigger than these plans?

Unlimited page views, subdomains, on premise installs and volume pricing

Tell us what you are running and we will put together a plan around it. Dedicated account manager, custom onboarding, a 24 hour speed fix warranty and volume based discounts.

14 day money back guarantee, no questions asked

14 day money back guarantee

Install it, measure it, and if the numbers do not move the way you expected, ask for your money back within 14 days. No questions asked.

All prices in USD. Cancel anytime, no contract and no minimum term.
Page views are counted by how often the Website Speedy script loads on your site.

Success stories

Faster pages, measured in revenue

Speed scores are the start. Here is what happened to the businesses behind them, within a single month of optimizing.

Born Outdoor
Outdoor gear · Wix
+167%orders
+101%gross sales
+33%conversion rate
+83%revenue

A slow site was losing shoppers before checkout. After optimization the store loaded faster and turned visitors into customers.

Certified MPT
Testing equipment · BigCommerce
+30%order rate
+55.8%revenue
+26.5%conversion rate
+19.7%avg order value

Slow load times were hurting Google rankings. Site performance improved by over 40%, lifting both traffic and on page engagement.

Hashtag Eyewear
Eyewear retail · Shopify
+21%gross sales
+6%orders
↓bounce rate
↑mobile speed

High ad spend was being wasted on a slow site. Faster pages and a smoother mobile experience recovered lost sales.

As seen on

Business Insider AP News NewsBreak Digital Journal The Globe and Mail

Over 20,000 signups for the Website Speedy AI PageSpeed Optimizer · 5 star rated on Trustpilot, Capterra and SourceForge

Questions

What teams ask before installing

Three concrete jobs, all live today. It reads each of your templates and picks an optimization strategy for that page type rather than applying one global config. It identifies the critical content and LCP element from the rendered page, so the right thing gets painted first. And it watches real visitor field data and re-tunes its own settings as your site changes. On the agentic side it also diagnoses what an AI agent cannot use on your page and tells you how to fix it.

Not on its own, and we will not claim otherwise. We fix layout stability (CLS) automatically, which is the check most sites fail. The other two we diagnose: you get a ranked list of the accessibility tree problems agents hit, and a report on what your llms.txt is missing along with what to publish. Those changes belong in your markup and at your domain root. Most sites gain a check the day they install, and reach 3/3 once the fix list is actioned.

Not today. Google describes the category as experimental and it does not feed into your Performance, Accessibility, Best Practices or SEO scores. Treat it as an early signal rather than a ranking lever. The underlying work still pays off immediately, though, because CLS is a Core Web Vital and fixing it moves a metric that does count.

No. The same script will run the new engine. You will see it all in your new dashboard soon, without any reinstall or config change.

Yes. It is a DIY tool built for founders, marketers and developers alike. You submit your URLs, install it through your platform's app store or a single header snippet, and optimization runs automatically. If you would like help, the support team can set it up for you.

Yes, anywhere you can add a header script. That includes Shopify, Wix, BigCommerce, Webflow, Squarespace, WordPress, Ecwid, HubSpot, Duda and fully custom sites.

No. Website Speedy defers and reorders how resources load, it does not delete content. Everything still arrives, it just arrives in a smarter order, with space reserved so the layout does not jump and the rest loading on the first interaction.

It depends on your site, but most websites reach 90+ on desktop and 70+ on mobile. If you do not see the expected results, the team performs a manual review and makes further adjustments at no extra charge.

Your PageSpeed score improves immediately. Google's ranking signals, though, are based on real visitor data collected over a rolling window, so Core Web Vitals improvements in Search Console typically take about four to six weeks to show.

They keep working. Third party scripts are deferred, then reinjected with async after a short delay, so tracking continues to run without blocking your first paint.

Yes. Website Speedy only analyzes performance and loading times. It does not access or store sensitive information like login details or personal data.

Find out what people and agents can't use on your site

One free scan returns your speed score, your Core Web Vitals, and the list of things an AI agent cannot read or click on your pages. No signup, no credit card.

Free scan · no credit card required · 14 day money back guarantee on paid plans