cbs.com website review

12 files are served with short cache lifetimes, so returning visitors download them again (31.2 MB).

About 1.3 MB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 5.8 s faster on a phone.

5 files block the first paint until they finish downloading. Deferring or inlining them could save about 4.0 s.

About 412 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 1.5 s faster on a phone.

Your mobile performance score is 43 (desktop: 61). Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

A phone's processor spends 6.7 s on main-thread work while loading, 3.5 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (Google CDN, paramount.com and Other Google APIs/SDKs and others), adding 35.3 MB and 1.4 s of main-thread time.

paramountplus.com costs a phone 0 ms of main-thread work and 33.7 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.

Google CDN costs a phone 699 ms of main-thread work and 733 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.

8 images could be 408 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.

paramount.com costs a phone 638 ms of main-thread work and 12 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 43 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 350 ms faster on a phone.

17 long tasks block the main thread while loading, the longest for 346 ms. During a long task the page ignores taps.

cbsstatic.com costs a phone 0 ms of main-thread work and 846 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.

27 KiB JavaScript is shipped twice across bundles. Google estimates it would make the page about 150 ms faster on a phone.

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.

The first text or image appears after 12.2 s on a phone. Good is under 1.8 s.

Your largest element takes 17.8 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “NFL on CBS”.

Visually, the page fills in at 12.2 s (Speed Index). Good is under 3.4 s.

The page becomes fully interactive after 18.7 s. Good is under 3.8 s.

Over the last 25 four-week periods to 2026-10-03, real Chrome visitors' tap response (inp) went from 129 ms to 161 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-03, real Chrome visitors' largest content (lcp) went from 1.9 s to 2.7 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Scripts block taps and scrolling for 488 ms in total while the page loads. Good is under 200 ms.

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

Your homepage downloads 37.4 MB in 64 requests on a phone: media 33.7 MB (4), scripts 1.4 MB (9) and other files 987 KiB (28). Under 2 MB keeps phones on slow connections fast.

10 images (674 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 10.59 g of CO₂e: 1271.0 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Images must have alternative text: 3 elements on the page fail this check, rated critical by axe-core.

Some list items are not inside a list.

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

1 form field has no label, so screen readers announce an empty box and autofill guesses.

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

Elements with visible text labels do not have matching accessible names. (3 elements).

Your title is 74 characters, so Google will cut it off around 60: “CBS TV Network Primetime, Daytime, Late Night and Classic Television Shows”.

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

There are 6 <h1> headlines (“”, “” and “”). One clear main headline is easier for people and search engines.

The homepage links to 59 pages on cbs.com and 42 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.

/live-tv/stream/cbs-news, /live-tv/stream/48-hours-channel, /live-tv/stream/judge-judy-channel, /live-tv/stream/hot-bench-channel, /live-tv/stream/golazo and /live-tv/stream/inside-edition and 3 others have no <title>, so Google invents the link text in results.

/live-tv/stream/cbs-news, /live-tv/stream/tveverywhere, /live-tv/stream/sports, /live-tv/stream/48-hours-channel, /live-tv/stream/judge-judy-channel and /live-tv/stream/hot-bench-channel and 7 others have no <h1> headline, so visitors and search engines get no clear main topic.

We fetched 15 pages linked from your homepage (of 20 found) and read each the way a search engine does.

4 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”.

Requests the geolocation permission on page load.

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

Large scripts ship without source maps.

No Strict-Transport-Security header, so browsers may still try plain http first on a return visit.

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

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.

cbs.com is registered until Dec 2026. Make sure auto-renew is on and the card on file is current.

cbs.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.

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

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

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 233 words of visible text; thin pages give Google and first-time buyers little to go on.

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

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 cbs.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 Amazon Ads, Comscore and Meta Pixel (measured from a US location before any click). A consent tool (Ketch) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 27 cookies (measured from a US location before any click).

Loading the homepage contacts 24 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.