Tools & Wizards About Us

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 67

    Accessibility

    Visual factors better than
    that of 32% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

voltimum.pt

Voltimum, a fonte central de informação para o sector

Page Load Speed

4.5 sec in total

First Response

341 ms

Resources Loaded

3.8 sec

Page Rendered

367 ms

About Website

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

Comunicação para profissionais do sector eléctrico e iluminação - desenvolvimentos técnicos, produtos, legislação, seminários, formação, app e videos

Visit voltimum.pt

Key Findings

We analyzed Voltimum.pt page load time and found that the first response time was 341 ms and then it took 4.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

voltimum.pt performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

14/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

20/100

25%

SI (Speed Index)

Value10.4 s

8/100

10%

TBT (Total Blocking Time)

Value3,830 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.098

90/100

15%

TTI (Time to Interactive)

Value21.0 s

1/100

10%

Network Requests Diagram

voltimum.pt

341 ms

www.voltimum.pt

431 ms

fbevents.js

317 ms

js

767 ms

comment_notify.css

713 ms

Our browser made a total of 148 requests to load all elements on the main page. We found that 3% of them (4 requests) were addressed to the original Voltimum.pt, 55% (81 requests) were made to D20g1hcwzqzdjk.cloudfront.net and 31% (46 requests) were made to Dpydhb3wsr746.cloudfront.net. The less responsive or slowest element that took the longest time to load (1 sec) relates to the external source Dpydhb3wsr746.cloudfront.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 160.5 kB (23%)

Content Size

702.8 kB

After Optimization

542.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Voltimum.pt main page is 702.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. Images take 360.6 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 95.5 kB

  • Original 120.3 kB
  • After minification 113.3 kB
  • After compression 24.8 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 95.5 kB or 79% of the original size.

Image Optimization

-12%

Potential reduce by 44.9 kB

  • Original 360.6 kB
  • After minification 315.7 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. Obviously, Voltimum needs image optimization as it can save up to 44.9 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-1%

Potential reduce by 1.4 kB

  • Original 110.0 kB
  • After minification 110.0 kB
  • After compression 108.6 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

-17%

Potential reduce by 18.7 kB

  • Original 112.0 kB
  • After minification 111.8 kB
  • After compression 93.3 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. Voltimum.pt needs all CSS files to be minified and compressed as it can save up to 18.7 kB or 17% of the original size.

Requests Breakdown

Number of requests can be reduced by 98 (67%)

Requests Now

146

After Optimization

48

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 146 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Voltimum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 74 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

voltimum.pt accessibility score

67

Accessibility Issues

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

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

voltimum.pt best practices score

67

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

User Experience

Impact

Issue

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

voltimum.pt SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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

    PT

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Voltimum.pt can be misinterpreted by Google and other search engines. Our service has detected that Portuguese is used on the page, and it matches the claimed language. Our system also found out that Voltimum.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 Voltimum. 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: