avio.com website review

Your mobile performance score is 48 (desktop: 93). Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

A phone's processor spends 4.6 s on main-thread work while loading, 2.8 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (Google CDN, Google Tag Manager and Accessibe Accessibility Overlay and others), adding 1.5 MB and 1.7 s of main-thread time.

About 803 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 450 ms faster on a phone.

9 files block the first paint until they finish downloading. Deferring or inlining them could save about 900 ms.

Google CDN costs a phone 716 ms of main-thread work and 351 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

Google Tag Manager costs a phone 444 ms of main-thread work and 308 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

20 long tasks block the main thread while loading, the longest for 335 ms. During a long task the page ignores taps.

Accessibe Accessibility Overlay costs a phone 286 ms of main-thread work and 243 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

11 files are served with short cache lifetimes, so returning visitors download them again (105 KiB).

3 images could be 84 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

About 32 KiB of CSS is downloaded but never applied on this page.

Desktop scores 93 but mobile only 48. A gap that wide usually means heavy scripts and images that hit phones hardest.

Polyfills for old browsers add 9 KiB JavaScript that modern phones do not need.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

The page becomes fully interactive after 16.7 s. Good is under 3.8 s.

The first text or image appears after 4.2 s on a phone. Good is under 1.8 s.

Scripts block taps and scrolling for 1.1 s in total while the page loads. Good is under 200 ms.

Your largest element takes 4.4 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “Avio is a leader in space propulsion, with more than 1,500 …”.

Visually, the page fills in at 6.2 s (Speed Index). Good is under 3.4 s.

Real visitors see the first content after 2.3 s (75th percentile). Good is under 1.8 s.

Real visitors wait 1.4 s for your server to start answering (75th percentile). Good is under 800 ms.

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' tap response (inp) went from 110 ms to 123 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 3.5 MB in 109 requests on a phone: scripts 2.1 MB (56), other files 744 KiB (14) and fonts 275 KiB (7). Under 2 MB keeps phones on slow connections fast.

1 image is downloaded at several times the size a phone draws it, for example avio_manual.jpg at 1,699 px wide, shown at 390 px. Resized copies would save about 31 KiB.

4 images further down the page (132 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 1.00 g of CO₂e: 120.5 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

2 buttons have no accessible name, so screen readers announce just “button”.

1 text element doesn't have enough contrast against the background to read easily, especially outdoors on a phone.

1 frame has no title, so screen-reader users cannot tell what it contains.

1 tap target is too small or too close together to hit reliably with a finger.

3 images have no alt text, which hurts accessibility and image search.

All page content should be contained by landmarks: 27 elements on the page fail this check, rated moderate by axe-core.

Document should not have more than one contentinfo landmark: 1 element on the page fails this check, rated moderate by axe-core.

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination: 1 element on the page fails this check, rated moderate by axe-core.

5 visible links have no text or label, so screen readers cannot say where they go.

2 form fields have no label, so screen readers announce an empty box and autofill guesses.

Headings skip levels (h1 → h3), which makes the page harder to scan with a screen reader.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

Your meta description is 179 characters; Google truncates after about 160, so the end of your pitch is cut.

2 links use generic text like “click here” or “learn more”, which tells Google nothing about the page behind them.

No twitter:card tag. X falls back to Open Graph, which is set, so this is minor.

The homepage links to 72 pages on avio.com and 25 external pages.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

There is no /llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

/what-we-do has no <h1> headline, so visitors and search engines get no clear main topic.

We fetched 15 pages linked from your homepage (of 27 found) and read each the way a search engine does.

1 error was logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_FAILED”.

1 link from your homepage to your own site is broken, for example https://www.avio.com/media-hub/news (404).

HSTS is set, but max-age is 180 days; one year is the recommended minimum.

There is no /.well-known/security.txt telling researchers how to report a security problem to you.

avio.com has no CAA record, so any certificate authority may issue a certificate for it. A CAA record naming your provider (for example letsencrypt.org) closes that door.

avio.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

Your homepage shows a map but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.

A local customer looking to call finds no phone number on the homepage. Add one, ideally as a tap-to-call link.

The homepage shows no opening hours. If customers visit or call, show when.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 952 words of visible text.

Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.

Before a visitor clicks anything, the page loads Google Analytics and Google Tag Manager (measured from a US location before any click). A consent tool (OneTrust) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 1 cookie (measured from a US location before any click).

Loading the homepage contacts 12 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.