Report Summary

  • 7

    Performance

    Renders faster than
    21% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 76

    SEO

    Google-friendlier than
    35% of websites

zon.pt

NOS - 5G, Internet, Telemóvel, Televisão e Telefone

Page Load Speed

7.1 sec in total

First Response

331 ms

Resources Loaded

6.5 sec

Page Rendered

287 ms

zon.pt screenshot

About Website

Click here to check amazing Zon content for Portugal. Otherwise, check out these important facts you probably never knew about zon.pt

Liga-te à rede 5G com os nossos tarifários móveis ou pacotes de Internet e televisão. Internet fixa e móvel, loja online com smartphones e muito mais.

Visit zon.pt

Key Findings

We analyzed Zon.pt page load time and found that the first response time was 331 ms and then it took 6.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

zon.pt performance score

7

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.3 s

1/100

10%

LCP (Largest Contentful Paint)

Value25.9 s

0/100

25%

SI (Speed Index)

Value13.5 s

2/100

10%

TBT (Total Blocking Time)

Value4,340 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.297

40/100

15%

TTI (Time to Interactive)

Value23.0 s

1/100

10%

Network Requests Diagram

www.nos.pt

331 ms

particulares

214 ms

home.aspx

218 ms

screen.min.css

276 ms

init.js

333 ms

Our browser made a total of 66 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Zon.pt, 11% (7 requests) were made to Cdn.nos.pt and 6% (4 requests) were made to Webcare.byside.com. The less responsive or slowest element that took the longest time to load (3.7 sec) relates to the external source Webcare.byside.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 888.9 kB (37%)

Content Size

2.4 MB

After Optimization

1.5 MB

In fact, the total size of Zon.pt main page is 2.4 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. 65% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 184.9 kB

  • Original 215.7 kB
  • After minification 200.3 kB
  • After compression 30.8 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 184.9 kB or 86% of the original size.

Image Optimization

-1%

Potential reduce by 18.4 kB

  • Original 1.3 MB
  • After minification 1.2 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. Zon images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 442.3 kB

  • Original 624.0 kB
  • After minification 617.2 kB
  • After compression 181.7 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 442.3 kB or 71% of the original size.

CSS Optimization

-86%

Potential reduce by 243.3 kB

  • Original 282.8 kB
  • After minification 281.9 kB
  • After compression 39.5 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. Zon.pt needs all CSS files to be minified and compressed as it can save up to 243.3 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (53%)

Requests Now

60

After Optimization

28

The browser has sent 60 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zon. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

zon.pt accessibility score

74

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

[aria-hidden="true"] elements contain focusable descendents

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

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

zon.pt best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

zon.pt SEO score

76

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

Mobile Friendly

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/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    PT

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zon.pt can be misinterpreted by Google and other search engines. Our service has detected that Portuguese 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 Zon.pt 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 Zon. 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: