Access cbs4denver.com. CBS Colorado - Breaking News, Sports, First Alert Weather & Community Journalism

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

62/100

10%

LCP (Largest Contentful Paint)

Value10.7 s

0/100

25%

SI (Speed Index)

Value19.4 s

0/100

10%

TBT (Total Blocking Time)

Value6,380 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.107

88/100

15%

TTI (Time to Interactive)

Value51.7 s

0/100

10%

cbs4denver.com

135 ms

denver.cbslocal.com

23 ms

36 ms

b045ff853a4e0f5e83a6f3bbea-prod.js

143 ms

door.min.css

6 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Cbs4denver.com, 30% (21 requests) were made to Assets1.cbsnewsstatic.com and 25% (17 requests) were made to Assets3.cbsnewsstatic.com. The less responsive or slowest element that took the longest time to load (377 ms) relates to the external source Assets1.cbsnewsstatic.com.

Content Size

8.2 MB

After Optimization

7.2 MB

In fact, the total size of Cbs4denver.com main page is 8.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only a small number of websites need less resources to load. Images take 7.4 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 276.2 kB

Original 342.7 kB
After minification 297.4 kB
After compression 66.5 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 45.4 kB, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 276.2 kB or 81% of the original size.

Image Optimization

-5%

Potential reduce by 392.9 kB

Original 7.4 MB
After minification 7.0 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. CBS 4denver images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 207 B

Original 74.1 kB
After minification 74.1 kB
After compression 73.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-77%

Potential reduce by 264.1 kB

Original 343.1 kB
After minification 342.3 kB
After compression 78.9 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Cbs4denver.com needs all CSS files to be minified and compressed as it can save up to 264.1 kB or 77% of the original size.

Requests Now

After Optimization

The browser has sent 61 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CBS 4denver. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cbs4denver.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Cbs4denver.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

cbs4denver.com

Open Graph data is detected on the main page of CBS 4denver. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

CBS Colorado - Breaking News, Sports, First Alert Weather & Community Journalism

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

cbs4denver.com

denver.cbslocal.com

b045ff853a4e0f5e83a6f3bbea-prod.js

door.min.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

cbs4denver.com

denver.cbslocal.com

b045ff853a4e0f5e83a6f3bbea-prod.js

door.min.css

wxwidget.loader.js

widget.js

main.js

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