Tools & Wizards About Us

Report Summary

  • 31

    Performance

    Renders faster than
    51% of other websites

  • 61

    Accessibility

    Visual factors better than
    that of 27% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 57

    SEO

    Google-friendlier than
    20% of websites

blackbox.co.uk

Black Box - Network Connectivity Provider - UK and Ireland

Page Load Speed

2.9 sec in total

First Response

144 ms

Resources Loaded

2.7 sec

Page Rendered

130 ms

About Website

Click here to check amazing Black Box content for United States. Otherwise, check out these important facts you probably never knew about blackbox.co.uk

Black Box Technology Product Solutions. Everything you need for your data network, buy it at Black Box.

Visit blackbox.co.uk

Key Findings

We analyzed Blackbox.co.uk page load time and found that the first response time was 144 ms and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

blackbox.co.uk performance score

31

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value8.9 s

1/100

25%

SI (Speed Index)

Value6.4 s

41/100

10%

TBT (Total Blocking Time)

Value900 ms

31/100

30%

CLS (Cumulative Layout Shift)

Value0.079

94/100

15%

TTI (Time to Interactive)

Value10.2 s

25/100

10%

Network Requests Diagram

144 ms

bootstrap.min.css

92 ms

All.css

185 ms

prettyPhoto.css

277 ms

style.css

812 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 74% of them (42 requests) were addressed to the original Blackbox.co.uk, 7% (4 requests) were made to Image.providesupport.com and 5% (3 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (893 ms) belongs to the original domain Blackbox.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 177.0 kB (16%)

Content Size

1.1 MB

After Optimization

909.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Blackbox.co.uk main page is 1.1 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. 40% of websites need less resources to load. Images take 616.4 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 37.0 kB

  • Original 47.8 kB
  • After minification 44.4 kB
  • After compression 10.8 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 37.0 kB or 77% of the original size.

Image Optimization

-3%

Potential reduce by 16.2 kB

  • Original 616.4 kB
  • After minification 600.3 kB

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. Black Box images are well optimized though.

JavaScript Optimization

-26%

Potential reduce by 74.6 kB

  • Original 283.9 kB
  • After minification 283.9 kB
  • After compression 209.3 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 74.6 kB or 26% of the original size.

CSS Optimization

-36%

Potential reduce by 49.2 kB

  • Original 138.3 kB
  • After minification 138.3 kB
  • After compression 89.1 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. Blackbox.co.uk needs all CSS files to be minified and compressed as it can save up to 49.2 kB or 36% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (58%)

Requests Now

55

After Optimization

23

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 55 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Black Box. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

blackbox.co.uk accessibility score

61

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[role]s do not have all required [aria-*] attributes

High

ARIA IDs are not unique

Names and labels

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.

Impact

Issue

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

High

[lang] attributes do not have a valid value

Best Practices

blackbox.co.uk best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

blackbox.co.uk SEO score

57

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blackbox.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Blackbox.co.uk 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

Open Graph description is not detected on the main page of Black Box. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: