avionicinstruments.com website review

3 files block the first paint until they finish downloading. Deferring or inlining them could save about 2.4 s.

7 files are served with short cache lifetimes, so returning visitors download them again (9.4 MB).

8 third-party services load with your homepage (website-files.com, Embedly and cloudfront.net and others), adding 10.4 MB and 288 ms of main-thread time.

website-files.com costs a phone 98 ms of main-thread work and 9.6 MB 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.

Your mobile performance score is 75 (desktop: 72). Pages that score under 90 lose visitors before the first paint.

About 417 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 150 ms faster on a phone.

The page has 1,708 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

Vimeo costs a phone 41 ms of main-thread work and 523 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.

2 images could be 115 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 150 ms faster on a phone.

8 long tasks block the main thread while loading, the longest for 132 ms. During a long task the page ignores taps.

About 53 KiB of CSS is downloaded but never applied on this page.

Polyfills for old browsers add 10 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.

5 KiB could be saved by minifying CSS.

The page becomes fully interactive after 10.7 s. Good is under 3.8 s.

The first text or image appears after 3.3 s on a phone. Good is under 1.8 s.

Your largest element takes 4.2 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the element shown below.

Visually, the page fills in at 3.7 s (Speed Index). Good is under 3.4 s.

12 images have no width and height attributes, so the layout jumps as each one loads.

Scripts block taps and scrolling for 209 ms in total while the page loads. Good is under 200 ms.

Chrome's UX Report (opens in a new tab) has too little real-visitor traffic for this site, so the figures here are lab measurements from Google's test phone on a throttled 4G connection.

Your homepage downloads 10.6 MB in 50 requests on a phone: media 9.3 MB (2), scripts 774 KiB (13) and images 229 KiB (11). Under 2 MB keeps phones on slow connections fast.

1 image (36 KiB) is JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

By the Sustainable Web Design model, a visit to your homepage emits about 3.01 g of CO₂e: 360.6 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

<html> element must have a lang attribute: 1 element on the page fails this check, rated serious by axe-core.

All page content should be contained by landmarks: 11 elements on the page fail this check, rated moderate by axe-core.

The page has no <main> landmark, so screen-reader users cannot jump straight to the content.

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.

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

The <html> element has no lang attribute, so screen readers may read the page in the wrong voice and accent.

No meta description, so Google writes its own snippet from whatever text it finds.

Your title is only 4 characters: “Home”. Between 30 and 65 characters leaves room to say what you do and for whom.

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

There are 11 <h1> headlines (“Request Quotation”, “Career Application” and “Request Quotation”). One clear main headline is easier for people and search engines.

No canonical URL, so duplicate versions of the homepage (with or without www, with tracking parameters) can split ranking signals.

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

Open Graph is missing og:description, so shared links fall back to guesses.

No twitter:card tag. X falls back to Open Graph, which is incomplete here.

The homepage links to 282 pages on avionicinstruments.com and 7 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.

/markets/other, /markets/military-modifications, /markets/commercial-completions, /markets/commercial-rotocraft, /markets/large-commercial-transport and /markets/business-regional-aircraft and 8 others all use the title “Avionic”. Search engines can't tell which page to show for a search, so each competes with the others.

/legal/privacy-policy, /markets/other, /markets/military-modifications, /markets/commercial-completions, /markets/commercial-rotocraft and /markets/large-commercial-transport and 9 others have no meta description, so Google writes the search snippet from whatever text it finds.

We fetched 15 pages linked from your homepage (of 67 found) and read each the way a search engine does.

2 third-party cookies are set on load; browsers are restricting these, so whatever relies on them breaks.

The page uses 1 deprecated browser API that will stop working in future browsers (“Unload event listeners are deprecated and will be removed.”).

2 errors were logged to the browser console while the page loaded, for example “Failed to load resource: net::ERR_FAILED”.

Chrome logged issues while loading the page (“Cookie”).

Large scripts ship without source maps.

No Content-Security-Policy header, the main browser-side defence against injected scripts.

Neither X-Frame-Options nor a CSP frame-ancestors policy is set, so any site can embed yours in a frame.

X-Content-Type-Options: nosniff is missing, so browsers may guess file types.

No Referrer-Policy header, so full URLs can leak to the sites you link to.

No Permissions-Policy header to switch off camera, microphone and location for embedded content.

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

avionicinstruments.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.

avionicinstruments.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.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

Social proof on the homepage: 4 testimonial or review blocks. Pairing it with named testimonials or customer logos makes it far more convincing.

Your longest form asks for 16 fields (15 required). Every extra field lowers completion.

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 572 words of visible text.

We found no DKIM key on the selectors the big email providers use. If you send through one of them, turning on DKIM signing improves delivery.

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 (measured from a US location before any click). A consent tool (CookieYes) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 4 cookies, 2 of them by other companies (measured from a US location before any click).

Loading the homepage contacts 13 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.