Tools & Wizards About Us
zzboiler.org screenshot

Report Summary

  • 55

    Performance

    Renders faster than
    72% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

zzboiler.org

industrial steam boiler,industrial steam boiler manufacturer,hot water boiler manufacturer-ZBG Boiler

Page Load Speed

3.1 sec in total

First Response

202 ms

Resources Loaded

2.7 sec

Page Rendered

203 ms

zzboiler.org screenshot

About Website

Click here to check amazing Zz Boiler content. Otherwise, check out these important facts you probably never knew about zzboiler.org

70 years experiences of industrial steam boiler manufacturer and supplier in China, with A1, A2, C3 pressure vessel design and ASME, IBR boiler certificates.

Visit zzboiler.org

Key Findings

We analyzed Zzboiler.org page load time and found that the first response time was 202 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

zzboiler.org performance score

55

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

45/100

10%

LCP (Largest Contentful Paint)

Value9.0 s

1/100

25%

SI (Speed Index)

Value8.9 s

15/100

10%

TBT (Total Blocking Time)

Value180 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.3 s

61/100

10%

Network Requests Diagram

zzboiler.org

202 ms

www.zzboiler.org

179 ms

www.zzboiler.org

354 ms

global.css

297 ms

index.css

324 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 80% of them (33 requests) were addressed to the original Zzboiler.org, 10% (4 requests) were made to Dqt.zoosnet.net and 5% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source Dqt.zoosnet.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 40.8 kB (1%)

Content Size

2.9 MB

After Optimization

2.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zzboiler.org main page is 2.9 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. Images take 2.8 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 20.6 kB

  • Original 26.0 kB
  • After minification 22.0 kB
  • After compression 5.4 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 4.0 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 20.6 kB or 79% of the original size.

Image Optimization

-1%

Potential reduce by 18.1 kB

  • Original 2.8 MB
  • After minification 2.8 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. Zz Boiler images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 528 B

  • Original 46.6 kB
  • After minification 46.6 kB
  • After compression 46.0 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

-23%

Potential reduce by 1.5 kB

  • Original 6.6 kB
  • After minification 6.6 kB
  • After compression 5.1 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. Zzboiler.org needs all CSS files to be minified and compressed as it can save up to 1.5 kB or 23% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (19%)

Requests Now

36

After Optimization

29

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zz Boiler. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

zzboiler.org

zzboiler.org

202 ms

www.zzboiler.org

www.zzboiler.org

179 ms

www.zzboiler.org

www.zzboiler.org

354 ms

global.css

global.css

297 ms

index.css

index.css

324 ms

terminal.php

terminal.php

362 ms

email-decode.min.js

email-decode.min.js

22 ms

jquery.soChange-min.js

jquery.soChange-min.js

364 ms

jquery.bxSlider.min.js

jquery.bxSlider.min.js

311 ms

js

js

58 ms

LsJS.aspx

LsJS.aspx

1260 ms

jquery.min.js

jquery.min.js

378 ms

ico.png

ico.png

412 ms

logo.png

logo.png

22 ms

bann-bg6.jpg

bann-bg6.jpg

302 ms

ban-6.jpg

ban-6.jpg

23 ms

bann-bg1.jpg

bann-bg1.jpg

303 ms

ban-1.jpg

ban-1.jpg

1106 ms

ban-2.jpg

ban-2.jpg

49 ms

ban-3.jpg

ban-3.jpg

26 ms

ban-4.jpg

ban-4.jpg

49 ms

ban-5.jpg

ban-5.jpg

50 ms

icon.png

icon.png

50 ms

df622658296b3bb86453d50b74bab053.jpg

df622658296b3bb86453d50b74bab053.jpg

71 ms

fb4ec15f61e7f5d2a311129ec6f57c67.jpg

fb4ec15f61e7f5d2a311129ec6f57c67.jpg

70 ms

3cadcfdce454b0b80f961bdc553da6ac.jpg

3cadcfdce454b0b80f961bdc553da6ac.jpg

100 ms

c92f70166193e8da34d6f157a4684794.jpg

c92f70166193e8da34d6f157a4684794.jpg

99 ms

bc2beaf1c63143ce46b19f615952662f.jpg

bc2beaf1c63143ce46b19f615952662f.jpg

100 ms

76e7a03644550487eb215c4b680c409f.jpg

76e7a03644550487eb215c4b680c409f.jpg

99 ms

8416d06ba7fab70bbe83a21ae1549bec.jpg

8416d06ba7fab70bbe83a21ae1549bec.jpg

105 ms

4e1f43c5f6e54e103d3d0caa7f278a07.jpg

4e1f43c5f6e54e103d3d0caa7f278a07.jpg

108 ms

e333b958740e8baf7df3dcad2d102f66.jpg

e333b958740e8baf7df3dcad2d102f66.jpg

116 ms

79a0d79e121fc5f7f9eff23c3f17ed05.jpg

79a0d79e121fc5f7f9eff23c3f17ed05.jpg

118 ms

bg_footer.jpg

bg_footer.jpg

139 ms

top.gif

top.gif

118 ms

js

js

57 ms

analytics.js

analytics.js

16 ms

collect

collect

14 ms

JS5.css

JS5.css

219 ms

offline_en.jpg

offline_en.jpg

237 ms

11.gif

11.gif

437 ms

Accessibility Review

zzboiler.org accessibility score

69

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.

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Definition list items are not wrapped in <dl> elements

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

zzboiler.org 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

SEO Factors

zzboiler.org SEO score

69

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

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

zzboiler.org

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