Tools & Wizards About Us
sustainablecities.eu screenshot

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 57

    SEO

    Google-friendlier than
    20% of websites

sustainablecities.eu

European Sustainable Cities Platform |  Home

Page Load Speed

3.6 sec in total

First Response

382 ms

Resources Loaded

2.8 sec

Page Rendered

441 ms

sustainablecities.eu screenshot

About Website

Welcome to sustainablecities.eu homepage info - get ready to check Sustainable Cities best content for Spain right away, or after learning these important things about sustainablecities.eu

The European Sustainable Cities Platform was launched in 2016, following the 8th European Conference on Sustainable Cities & Towns in the Basque Country. Supported by the City of Aalborg, Denmark, and...

Visit sustainablecities.eu

Key Findings

We analyzed Sustainablecities.eu page load time and found that the first response time was 382 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

sustainablecities.eu performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

23/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value7.8 s

23/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.664

8/100

15%

TTI (Time to Interactive)

Value9.5 s

30/100

10%

Network Requests Diagram

sustainablecities.eu

382 ms

325 ms

stylesheet_04ae614508.css

98 ms

bootstrap.css

43 ms

font-awesome.css

58 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 83% of them (60 requests) were addressed to the original Sustainablecities.eu, 6% (4 requests) were made to Maxcdn.bootstrapcdn.com and 6% (4 requests) were made to Legal.iclei-europe.org. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Sustainablecities.eu.

Page Optimization Overview & Recommendations

Page size can be reduced by 636.2 kB (20%)

Content Size

3.1 MB

After Optimization

2.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sustainablecities.eu main page is 3.1 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. 55% of websites need less resources to load. Images take 3.0 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 51.6 kB

  • Original 64.6 kB
  • After minification 54.0 kB
  • After compression 13.0 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 10.6 kB, which is 16% 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 51.6 kB or 80% of the original size.

Image Optimization

-19%

Potential reduce by 566.6 kB

  • Original 3.0 MB
  • After minification 2.4 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. Obviously, Sustainable Cities needs image optimization as it can save up to 566.6 kB or 19% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-23%

Potential reduce by 11.9 kB

  • Original 52.8 kB
  • After minification 52.6 kB
  • After compression 40.9 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 11.9 kB or 23% of the original size.

CSS Optimization

-36%

Potential reduce by 6.1 kB

  • Original 16.8 kB
  • After minification 16.8 kB
  • After compression 10.7 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. Sustainablecities.eu needs all CSS files to be minified and compressed as it can save up to 6.1 kB or 36% of the original size.

Requests Breakdown

Number of requests can be reduced by 31 (50%)

Requests Now

62

After Optimization

31

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sustainable Cities. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sustainablecities.eu

sustainablecities.eu

382 ms

325 ms

stylesheet_04ae614508.css

stylesheet_04ae614508.css

98 ms

bootstrap.css

bootstrap.css

43 ms

font-awesome.css

font-awesome.css

58 ms

page_layout.css

page_layout.css

196 ms

content_style.css

content_style.css

290 ms

typo3_tx_cssstyledcontent.css

typo3_tx_cssstyledcontent.css

291 ms

menu.css

menu.css

292 ms

back_to_top_button.css

back_to_top_button.css

292 ms

utility.css

utility.css

294 ms

flexslider.css

flexslider.css

296 ms

twitter_feeds.css

twitter_feeds.css

385 ms

owl.carousel.css

owl.carousel.css

386 ms

owl.theme.css

owl.theme.css

387 ms

eNewsSubscription.css

eNewsSubscription.css

387 ms

header_logo.png

header_logo.png

494 ms

flickr_icon.png

flickr_icon.png

495 ms

header_logo_sticky.png

header_logo_sticky.png

491 ms

Sustainable-Cities-header-TAA-winner-2022.jpg

Sustainable-Cities-header-TAA-winner-2022.jpg

1052 ms

legal_texts.js

legal_texts.js

487 ms

jquery.tools.min.js

jquery.tools.min.js

58 ms

jquery-1.12.4.js

jquery-1.12.4.js

53 ms

bootstrap.js

bootstrap.js

49 ms

window_size_dependencies.js

window_size_dependencies.js

488 ms

back_to_top_button.js

back_to_top_button.js

488 ms

lightbox_utility_contact.js

lightbox_utility_contact.js

568 ms

lightbox_utility_impressum.js

lightbox_utility_impressum.js

573 ms

lightbox_utility_dataprotection.js

lightbox_utility_dataprotection.js

574 ms

jquery.malihu.PageScroll2id.js

jquery.malihu.PageScroll2id.js

576 ms

canvas.js

canvas.js

575 ms

init_accordions.js

init_accordions.js

663 ms

jquery.flexslider.js

jquery.flexslider.js

670 ms

init_flexslider.js

init_flexslider.js

669 ms

owl.carousel.js

owl.carousel.js

674 ms

init_owl-carousel.js

init_owl-carousel.js

673 ms

init_endorsers_counter.js

init_endorsers_counter.js

759 ms

jquery.spincrement.js

jquery.spincrement.js

765 ms

Sustainable-Cities-header-LGD.jpg

Sustainable-Cities-header-LGD.jpg

1155 ms

Sustainable-Cities-header-MM.jpg

Sustainable-Cities-header-MM.jpg

1160 ms

header_post_banner.png

header_post_banner.png

769 ms

1.png

1.png

1523 ms

lisbon.jpg

lisbon.jpg

1055 ms

hannover.jpg

hannover.jpg

963 ms

aalborg_2.jpg

aalborg_2.jpg

1075 ms

seville.jpg

seville.jpg

960 ms

dunkerque.png

dunkerque.png

1167 ms

geneva.jpg

geneva.jpg

961 ms

basque.jpg

basque.jpg

975 ms

mannheim.jpg

mannheim.jpg

977 ms

Bird_big.png

Bird_big.png

978 ms

aalborg_footer.jpg

aalborg_footer.jpg

1051 ms

iclei_footer.jpg

iclei_footer.jpg

978 ms

cor_footer.jpg

cor_footer.jpg

980 ms

eib_footer.jpg

eib_footer.jpg

975 ms

twitter_icon.png

twitter_icon.png

948 ms

header_bg.png

header_bg.png

964 ms

line_white.png

line_white.png

964 ms

footer_post_banner_big.png

footer_post_banner_big.png

969 ms

Montserrat-Regular.ttf

Montserrat-Regular.ttf

1041 ms

Montserrat-Bold.ttf

Montserrat-Bold.ttf

1056 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

32 ms

impressum-generic.html

impressum-generic.html

95 ms

gdpr-generic.html

gdpr-generic.html

190 ms

matomo.js

matomo.js

516 ms

OpenSans-Regular.ttf

OpenSans-Regular.ttf

991 ms

OpenSans-SemiBold.ttf

OpenSans-SemiBold.ttf

986 ms

OpenSans-Bold.ttf

OpenSans-Bold.ttf

986 ms

generic.css

generic.css

199 ms

bg_control_nav.png

bg_control_nav.png

806 ms

button_up.png

button_up.png

809 ms

matomo.php

matomo.php

197 ms

Accessibility Review

sustainablecities.eu accessibility score

59

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

sustainablecities.eu best practices score

58

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

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

SEO Factors

sustainablecities.eu 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

High

robots.txt is not valid

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 doesn't use 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 Sustainablecities.eu 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 Sustainablecities.eu 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

sustainablecities.eu

Open Graph description is not detected on the main page of Sustainable Cities. 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: