Tools & Wizards About Us
pcjs.org screenshot

Report Summary

  • 97

    Performance

    Renders faster than
    94% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

pcjs.org

PCjs Machines

Page Load Speed

598 ms in total

First Response

28 ms

Resources Loaded

356 ms

Page Rendered

214 ms

pcjs.org screenshot

About Website

Visit pcjs.org now to see the best up-to-date PCjs content for United States and also check out these interesting facts you probably never knew about pcjs.org

PCjs offers a variety of online machine emulators written in JavaScript. Run DOS, Windows, OS/2 and other vintage PC applications in a web browser on your desktop computer, iPhone, or iPad. An assortm...

Visit pcjs.org

Key Findings

We analyzed Pcjs.org page load time and found that the first response time was 28 ms and then it took 570 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

pcjs.org performance score

97

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.7 s

91/100

10%

LCP (Largest Contentful Paint)

Value1.7 s

99/100

25%

SI (Speed Index)

Value1.7 s

100/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.021

100/100

15%

TTI (Time to Interactive)

Value3.6 s

91/100

10%

Network Requests Diagram

pcjs.org

28 ms

www.pcjs.org

95 ms

style.css

15 ms

components.css

24 ms

logo-home.png

29 ms

Our browser made a total of 51 requests to load all elements on the main page. We found that 92% of them (47 requests) were addressed to the original Pcjs.org, 4% (2 requests) were made to Googletagmanager.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (185 ms) belongs to the original domain Pcjs.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 440.7 kB (29%)

Content Size

1.5 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Pcjs.org main page is 1.5 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. 50% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-92%

Potential reduce by 196.0 kB

  • Original 212.1 kB
  • After minification 136.3 kB
  • After compression 16.1 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 75.9 kB, which is 36% 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 196.0 kB or 92% of the original size.

Image Optimization

-17%

Potential reduce by 212.7 kB

  • Original 1.3 MB
  • After minification 1.0 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, PCjs needs image optimization as it can save up to 212.7 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-60%

Potential reduce by 32.0 kB

  • Original 52.9 kB
  • After minification 52.9 kB
  • After compression 20.9 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 32.0 kB or 60% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

46

After Optimization

46

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of PCjs. According to our analytics all requests are already optimized.

Network Requests Diagram

pcjs.org

pcjs.org

28 ms

www.pcjs.org

www.pcjs.org

95 ms

style.css

style.css

15 ms

components.css

components.css

24 ms

logo-home.png

logo-home.png

29 ms

thumbnail.png

thumbnail.png

30 ms

thumbnail.png

thumbnail.png

36 ms

thumbnail.png

thumbnail.png

24 ms

thumbnail.png

thumbnail.png

29 ms

thumbnail.png

thumbnail.png

38 ms

thumbnail.png

thumbnail.png

30 ms

thumbnail.png

thumbnail.png

33 ms

thumbnail.png

thumbnail.png

43 ms

thumbnail.png

thumbnail.png

48 ms

thumbnail.png

thumbnail.png

42 ms

thumbnail.png

thumbnail.png

49 ms

thumbnail.png

thumbnail.png

73 ms

thumbnail.png

thumbnail.png

41 ms

thumbnail.png

thumbnail.png

55 ms

thumbnail.png

thumbnail.png

66 ms

thumbnail.png

thumbnail.png

60 ms

thumbnail.png

thumbnail.png

60 ms

thumbnail.png

thumbnail.png

65 ms

thumbnail.png

thumbnail.png

68 ms

thumbnail.png

thumbnail.png

81 ms

thumbnail.png

thumbnail.png

74 ms

thumbnail.png

thumbnail.png

77 ms

thumbnail.png

thumbnail.png

126 ms

thumbnail.png

thumbnail.png

77 ms

thumbnail.png

thumbnail.png

83 ms

thumbnail.png

thumbnail.png

126 ms

thumbnail.png

thumbnail.png

91 ms

explorer.js

explorer.js

89 ms

js

js

78 ms

thumbnail.png

thumbnail.png

118 ms

thumbnail.png

thumbnail.png

119 ms

thumbnail.png

thumbnail.png

120 ms

thumbnail.png

thumbnail.png

121 ms

thumbnail.png

thumbnail.png

126 ms

thumbnail.png

thumbnail.png

123 ms

thumbnail.png

thumbnail.png

113 ms

thumbnail.png

thumbnail.png

112 ms

thumbnail.png

thumbnail.png

106 ms

thumbnail.png

thumbnail.png

108 ms

thumbnail.png

thumbnail.png

185 ms

thumbnail.png

thumbnail.png

184 ms

analytics.js

analytics.js

39 ms

collect

collect

14 ms

Noto-Sans-700.woff

Noto-Sans-700.woff

17 ms

Noto-Sans-regular.woff

Noto-Sans-regular.woff

10 ms

js

js

14 ms

Accessibility Review

pcjs.org accessibility score

95

Accessibility Issues

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

Links do not have a discernible name

Best Practices

pcjs.org best practices score

75

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

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

pcjs.org SEO score

100

Search Engine Optimization Advices

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

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 Pcjs.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 Pcjs.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

pcjs.org

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