Report Summary

  • 21

    Performance

    Renders faster than
    40% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 95% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 91

    SEO

    Google-friendlier than
    71% of websites

cityofchicago.org

City of Chicago

Page Load Speed

880 ms in total

First Response

90 ms

Resources Loaded

501 ms

Page Rendered

289 ms

cityofchicago.org screenshot

About Website

Click here to check amazing City Of Chicago content for United States. Otherwise, check out these important facts you probably never knew about cityofchicago.org

Welcome to the official City of Chicago Website. The source for information about City services, departments, programs and initiatives, and officials for Chicago residents, businesses, and visitors.

Visit cityofchicago.org

Key Findings

We analyzed Cityofchicago.org page load time and found that the first response time was 90 ms and then it took 790 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

cityofchicago.org performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.2 s

8/100

10%

LCP (Largest Contentful Paint)

Value8.5 s

1/100

25%

SI (Speed Index)

Value6.9 s

34/100

10%

TBT (Total Blocking Time)

Value2,140 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.047

99/100

15%

TTI (Time to Interactive)

Value18.7 s

3/100

10%

Network Requests Diagram

cityofchicago.org

90 ms

www.cityofchicago.org

40 ms

en.html

39 ms

cssshadows.css

6 ms

jquery.js

11 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 88% of them (36 requests) were addressed to the original Cityofchicago.org, 5% (2 requests) were made to S7.addthis.com and 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (101 ms) relates to the external source S7.addthis.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.3 MB (61%)

Content Size

2.2 MB

After Optimization

848.3 kB

In fact, the total size of Cityofchicago.org main page is 2.2 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. 60% of websites need less resources to load. Javascripts take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 93.6 kB

  • Original 121.7 kB
  • After minification 103.6 kB
  • After compression 28.0 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 18.1 kB, which is 15% 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 93.6 kB or 77% of the original size.

Image Optimization

-28%

Potential reduce by 177.4 kB

  • Original 635.2 kB
  • After minification 457.8 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, City Of Chicago needs image optimization as it can save up to 177.4 kB or 28% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-73%

Potential reduce by 929.2 kB

  • Original 1.3 MB
  • After minification 1.1 MB
  • After compression 342.2 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 929.2 kB or 73% of the original size.

CSS Optimization

-87%

Potential reduce by 137.2 kB

  • Original 157.5 kB
  • After minification 112.8 kB
  • After compression 20.3 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. Cityofchicago.org needs all CSS files to be minified and compressed as it can save up to 137.2 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (39%)

Requests Now

38

After Optimization

23

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of City Of Chicago. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

cityofchicago.org accessibility score

98

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

Best Practices

cityofchicago.org best practices score

83

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

Page has valid source maps

SEO Factors

cityofchicago.org SEO score

91

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

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cityofchicago.org 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 Cityofchicago.org 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 City Of Chicago. 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: