Tools & Wizards About Us
chemtoolbox.free.fr screenshot

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

chemtoolbox.free.fr

ChemToolBox, the swiss army knife of the lab worker

Page Load Speed

1.1 sec in total

First Response

276 ms

Resources Loaded

812 ms

Page Rendered

60 ms

chemtoolbox.free.fr screenshot

About Website

Visit chemtoolbox.free.fr now to see the best up-to-date Chem Tool Box Free content for France and also check out these interesting facts you probably never knew about chemtoolbox.free.fr

ChemToolBox, the swiss army knife of the lab worker, is the essential software of the scientist, containing numerous data very useful in a laboratory.

Visit chemtoolbox.free.fr

Key Findings

We analyzed Chemtoolbox.free.fr page load time and found that the first response time was 276 ms and then it took 872 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

chemtoolbox.free.fr performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.6 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.5 s

100/100

25%

SI (Speed Index)

Value0.6 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value0.6 s

100/100

10%

Network Requests Diagram

chemtoolbox.free.fr

276 ms

clickheat.js

163 ms

chemtoolbox.free.fr

172 ms

ban1.jpg

258 ms

fr.png

170 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that 75% of them (6 requests) were addressed to the original Chemtoolbox.free.fr, 25% (2 requests) were made to St.free.fr. The less responsive or slowest element that took the longest time to load (321 ms) relates to the external source St.free.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 12.1 kB (24%)

Content Size

50.4 kB

After Optimization

38.3 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Chemtoolbox.free.fr main page is 50.4 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only 5% of websites need less resources to load. Images take 42.5 kB which makes up the majority of the site volume.

HTML Optimization

-57%

Potential reduce by 2.0 kB

  • Original 3.6 kB
  • After minification 3.5 kB
  • After compression 1.5 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 2.0 kB or 57% of the original size.

Image Optimization

-17%

Potential reduce by 7.1 kB

  • Original 42.5 kB
  • After minification 35.5 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, Chem Tool Box Free needs image optimization as it can save up to 7.1 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

-70%

Potential reduce by 3.0 kB

  • Original 4.3 kB
  • After minification 3.4 kB
  • After compression 1.3 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 3.0 kB or 70% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

6

After Optimization

6

  • AJAX
  • Images
  • JavaScript

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chem Tool Box Free. According to our analytics all requests are already optimized.

Network Requests Diagram

chemtoolbox.free.fr

chemtoolbox.free.fr

276 ms

clickheat.js

clickheat.js

163 ms

chemtoolbox.free.fr

chemtoolbox.free.fr

172 ms

ban1.jpg

ban1.jpg

258 ms

fr.png

fr.png

170 ms

uk.png

uk.png

171 ms

phpmyvisites.js

phpmyvisites.js

321 ms

phpmyvisites.php

phpmyvisites.php

215 ms

Accessibility Review

chemtoolbox.free.fr accessibility score

84

Accessibility Issues

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

<object> elements do not have alternate text

Best Practices

chemtoolbox.free.fr best practices score

67

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

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

chemtoolbox.free.fr SEO score

75

Search Engine Optimization Advices

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 Chemtoolbox.free.fr 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 Chemtoolbox.free.fr 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

chemtoolbox.free.fr

Open Graph description is not detected on the main page of Chem Tool Box Free. 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: