atomicfilters.com website review

About 787 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 3.9 s faster on a phone.

13 files are served with short cache lifetimes, so returning visitors download them again (348 KiB).

A phone's processor spends 4.7 s on main-thread work while loading, 2.2 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (Shopify, Clarity and Bold Commerce and others), adding 1.9 MB and 1.1 s of main-thread time.

Your mobile performance score is 51. Pages that score under 90 lose visitors before the first paint.

Shopify costs a phone 487 ms of main-thread work and 1,003 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.

Polyfills for old browsers add 42 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 300 ms faster on a phone.

4 files block the first paint until they finish downloading. Deferring or inlining them could save about 300 ms.

Bold Commerce costs a phone 205 ms of main-thread work and 485 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.

The page has 2,170 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

Google CDN costs a phone 152 ms of main-thread work and 299 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.

1 image could be 14 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 250 ms faster on a phone.

12 long tasks block the main thread while loading, the longest for 244 ms. During a long task the page ignores taps.

About 37 KiB of CSS is downloaded but never applied on this page.

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.

2 KiB could be saved by minifying JavaScript.

Your largest element takes 14.0 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image.

The page becomes fully interactive after 17.8 s. Good is under 3.8 s.

Visually, the page fills in at 8.3 s (Speed Index). Good is under 3.4 s.

The first text or image appears after 3.5 s on a phone. Good is under 1.8 s.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 105 ms to 129 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Scripts block taps and scrolling for 396 ms in total while the page loads. Good is under 200 ms.

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

Your homepage downloads 3.5 MB in 410 requests on a phone: scripts 1.7 MB (129), other files 1.3 MB (235) and fonts 210 KiB (6). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 1.00 g of CO₂e: 120.3 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

7 tap targets are too small or too close together to hit reliably with a finger.

Some lists contain elements other than list items, which screen readers announce wrongly.

All page content should be contained by landmarks: 10 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.

10 text elements don'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 form field has no label, so screen readers announce an empty box and autofill guesses.

ARIA role should be appropriate for the element: 8 elements on the page fail this check, rated minor by axe-core.

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

Your title is 84 characters, so Google will cut it off around 60: “HVAC Air Filters | Pool & Spa Replacements | Carrier, Lennox, Trane – Atomic Filters”.

There are 4 <h1> headlines (“”, “Find Your Exact Filter Replacement — OEM & Compat…” and “4,200+ reviews · filters in stock · Same-day on O…”). One clear main headline is easier for people and search engines.

The homepage links to 431 pages on atomicfilters.com and 2 external pages.

We fetched 15 pages linked from your homepage (of 197 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”.

HSTS is set, but max-age is 91 days; one year is the recommended minimum.

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.

X-XSS-Protection is set to “1; mode=block”; the header is deprecated and can introduce bugs. Use 0 or remove it.

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

atomicfilters.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.

atomicfilters.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.

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.

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

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

The homepage has only about 47 words of visible text; thin pages give Google and first-time buyers little to go on.

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.

DMARC is set to p=none, so mail pretending to be atomicfilters.com is still delivered. Reports are on, so moving to quarantine is the next step.

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 Tag Manager, Meta Pixel and Microsoft Clarity (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 15 cookies, 11 of them by other companies (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 18 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.