Tools & Wizards About Us
chemcd.com screenshot

Report Summary

  • 62

    Performance

    Renders faster than
    76% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 74

    SEO

    Google-friendlier than
    31% of websites

chemcd.com

Chemical Cloud Database

Page Load Speed

9.1 sec in total

First Response

3.1 sec

Resources Loaded

5.9 sec

Page Rendered

150 ms

chemcd.com screenshot

About Website

Click here to check amazing Chemcd content for Iran. Otherwise, check out these important facts you probably never knew about chemcd.com

Chemical Cloud Database(chemcd). We name after ChemCD,adhere to the philosophy Data,continuously integrate all the chemical information into the ChemCD,provide the best Chemical Cloud Database for Che...

Visit chemcd.com

Key Findings

We analyzed Chemcd.com page load time and found that the first response time was 3.1 sec and then it took 6.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

chemcd.com performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value4.4 s

40/100

25%

SI (Speed Index)

Value6.9 s

33/100

10%

TBT (Total Blocking Time)

Value210 ms

88/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value8.0 s

43/100

10%

Network Requests Diagram

www.chemcd.com

3057 ms

font-awesome.min.css

13 ms

bootstrap.min.css

1376 ms

jquery.fancybox.css

726 ms

rs-style.css

461 ms

Our browser made a total of 62 requests to load all elements on the main page. We found that 63% of them (39 requests) were addressed to the original Chemcd.com, 26% (16 requests) were made to Assets.chemcd.cn and 5% (3 requests) were made to Netdna.bootstrapcdn.com. The less responsive or slowest element that took the longest time to load (3.1 sec) belongs to the original domain Chemcd.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 197.2 kB (52%)

Content Size

380.8 kB

After Optimization

183.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemcd.com main page is 380.8 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. 40% of websites need less resources to load. Images take 212.2 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 56.2 kB

  • Original 63.0 kB
  • After minification 45.3 kB
  • After compression 6.8 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. This page needs HTML code to be minified as it can gain 17.7 kB, which is 28% 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 56.2 kB or 89% of the original size.

Image Optimization

-66%

Potential reduce by 140.0 kB

  • Original 212.2 kB
  • After minification 72.2 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, Chemcd needs image optimization as it can save up to 140.0 kB or 66% 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 865 B

  • Original 69.2 kB
  • After minification 69.0 kB
  • After compression 68.3 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

-0%

Potential reduce by 134 B

  • Original 36.3 kB
  • After minification 36.3 kB
  • After compression 36.2 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. Chemcd.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 25 (45%)

Requests Now

56

After Optimization

31

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemcd. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.chemcd.com

www.chemcd.com

3057 ms

font-awesome.min.css

font-awesome.min.css

13 ms

bootstrap.min.css

bootstrap.min.css

1376 ms

jquery.fancybox.css

jquery.fancybox.css

726 ms

rs-style.css

rs-style.css

461 ms

settings.css

settings.css

695 ms

jquery.bxslider.css

jquery.bxslider.css

697 ms

style-chemcd.css

style-chemcd.css

687 ms

chemcdcss.min.css

chemcdcss.min.css

1185 ms

minilogo.png

minilogo.png

638 ms

uk.gif

uk.gif

715 ms

cn.gif

cn.gif

777 ms

head.png

head.png

890 ms

createImage.action

createImage.action

769 ms

createImage.action

createImage.action

702 ms

createImage.action

createImage.action

729 ms

createImage.action

createImage.action

960 ms

createImage.action

createImage.action

947 ms

createImage.action

createImage.action

976 ms

createImage.action

createImage.action

1025 ms

createImage.action

createImage.action

1162 ms

createImage.action

createImage.action

1190 ms

createImage.action

createImage.action

1198 ms

ollbonchem.png

ollbonchem.png

1425 ms

beian.png

beian.png

1437 ms

ad%2Fsyns.png

ad%2Fsyns.png

582 ms

ad%2Fheat.png

ad%2Fheat.png

572 ms

Agilebiochem.png

Agilebiochem.png

581 ms

7.png

7.png

579 ms

4.png

4.png

628 ms

ad%2Fkamel.png

ad%2Fkamel.png

661 ms

6.png

6.png

662 ms

stepup.png

stepup.png

664 ms

adsponsors.gif

adsponsors.gif

660 ms

9.png

9.png

714 ms

2.png

2.png

756 ms

weixin.jpg

weixin.jpg

752 ms

jquery-migrate-1.2.1.min.js

jquery-migrate-1.2.1.min.js

1043 ms

bootstrap.min.js

bootstrap.min.js

14 ms

hover-dropdown.js

hover-dropdown.js

1165 ms

jquery.fancybox.pack.js

jquery.fancybox.pack.js

1195 ms

jquery.themepunch.plugins.min.js

jquery.themepunch.plugins.min.js

1659 ms

jquery.themepunch.revolution.min.js

jquery.themepunch.revolution.min.js

1590 ms

jquery.bxslider.min.js

jquery.bxslider.min.js

1394 ms

app.js

app.js

1424 ms

index.js

index.js

1430 ms

jquery.min.js

jquery.min.js

16 ms

font.css

font.css

716 ms

syncfusion-icons-white.png

syncfusion-icons-white.png

262 ms

cJZKeOuBrn4kERxqtaUH3T8E0i7KZn-EPnyo3HZu7kw.woff

cJZKeOuBrn4kERxqtaUH3T8E0i7KZn-EPnyo3HZu7kw.woff

503 ms

DXI1ORHCpsQm3Vp6mXoaTXhCUOGz7vYGh680lGh-uXM.woff

DXI1ORHCpsQm3Vp6mXoaTXhCUOGz7vYGh680lGh-uXM.woff

463 ms

MTP_ySUJH_bn48VBG8sNSnhCUOGz7vYGh680lGh-uXM.woff

MTP_ySUJH_bn48VBG8sNSnhCUOGz7vYGh680lGh-uXM.woff

239 ms

k3k702ZOKiLJc3WVjuplzHhCUOGz7vYGh680lGh-uXM.woff

k3k702ZOKiLJc3WVjuplzHhCUOGz7vYGh680lGh-uXM.woff

473 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

11 ms

analytics.js

analytics.js

79 ms

up.png

up.png

230 ms

black-opacity.png

black-opacity.png

230 ms

bx_loader.gif

bx_loader.gif

331 ms

left.png

left.png

457 ms

right.png

right.png

458 ms

collect

collect

27 ms

js

js

72 ms

Accessibility Review

chemcd.com accessibility score

77

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

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.

Best Practices

chemcd.com best practices score

75

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

SEO Factors

chemcd.com SEO score

74

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

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 Chemcd.com 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 Chemcd.com 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

chemcd.com

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