chroma.com website review

About 260 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 1.5 s faster on a phone.

4 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.1 s.

Your mobile performance score is 63 (desktop: 95). Pages that score under 90 lose visitors before the first paint.

13 images could be 409 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 350 ms faster on a phone.

About 112 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 450 ms faster on a phone.

3 third-party services load with your homepage (FoxyCart, Matomo and JSDelivr CDN), adding 243 KiB and 150 ms of main-thread time.

2 long tasks block the main thread while loading, the longest for 124 ms. During a long task the page ignores taps.

Desktop scores 95 but mobile only 63. 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.

9 KiB could be saved by minifying CSS.

3 files are served with short cache lifetimes, so returning visitors download them again (8 KiB).

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.

Your largest element takes 8.7 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “hero about fluorescence ebook new”.

The page becomes fully interactive after 8.8 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.

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

Real visitors wait 3.3 s for the largest content to appear (75th percentile). Good is under 2.5 s.

Real visitors see the first content after 2.7 s (75th percentile). Good is under 1.8 s.

Real visitors wait 1.7 s for your server to start answering (75th percentile). Good is under 800 ms.

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

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' tap response (inp) went from 176 ms to 166 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' largest content (lcp) went from 3.1 s to 3.3 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

12 images further down the page (575 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.

7 images (486 KiB) are 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 0.39 g of CO₂e: 46.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

53 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

All page content should be contained by landmarks: 5 elements on the page fail this check, rated moderate by axe-core.

1 visible link has no text or label, so screen readers cannot say where it goes.

Headings skip levels (h2 → h4 and h2 → h4), which makes the page harder to scan with a screen reader.

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

Your title is 96 characters, so Google will cut it off around 60: “Optical Filters, Custom & OEM Filter Design, Imaging Systems & Products - Chroma Technolo…”.

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

20 links have no real href, so search engines can't follow them.

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

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

The homepage links to 285 pages on chroma.com and 6 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.

/products, /products/filters/filter-types, /products/filters/all-filters, /products/filters/astronomy, /products/filters/astronomy/lrgb and /products/filters/astronomy/narrowband 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 119 found) and read each the way a search engine does.

5 of 13 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

2 errors were logged to the browser console while the page loaded, for example “Access to XMLHttpRequest at 'https://cdn.foxycart.com/secure.chroma.com/responsive_styles.1724471010.css' from origin '…”.

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.

1 link go through two or more redirects, for example https://www.twitter.com/ChromaVT/.

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.

chroma.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.

chroma.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.

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

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

No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

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

Your phone number appears as text but isn't a tel: link, so phone visitors can't tap to call.

There is no form on the homepage, so every lead has to click through to another page first.

There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.

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 708 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.

Opening the homepage sets 4 cookies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 4 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.