Tools & Wizards About Us
janson-de-sailly.fr screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 60

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 77

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

janson-de-sailly.fr

Lycée Janson de Sailly

Page Load Speed

1.2 sec in total

First Response

309 ms

Resources Loaded

671 ms

Page Rendered

195 ms

janson-de-sailly.fr screenshot

About Website

Visit janson-de-sailly.fr now to see the best up-to-date Janson De Sailly content for France and also check out these interesting facts you probably never knew about janson-de-sailly.fr

lycée janson de sailly - Paris. Collège, Lycée, CPGE

Visit janson-de-sailly.fr

Key Findings

We analyzed Janson-de-sailly.fr page load time and found that the first response time was 309 ms and then it took 866 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

janson-de-sailly.fr performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value12.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value18.2 s

0/100

25%

SI (Speed Index)

Value36.9 s

0/100

10%

TBT (Total Blocking Time)

Value650 ms

46/100

30%

CLS (Cumulative Layout Shift)

Value0.781

6/100

15%

TTI (Time to Interactive)

Value20.8 s

2/100

10%

Network Requests Diagram

janson-de-sailly.fr

309 ms

menu.php

101 ms

principal.php

174 ms

pied.html

175 ms

fondjs.jpg

96 ms

Our browser made a total of 10 requests to load all elements on the main page. We found that all of those requests were addressed to Janson-de-sailly.fr and no external sources were called. The less responsive or slowest element that took the longest time to load (309 ms) belongs to the original domain Janson-de-sailly.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.2 kB (19%)

Content Size

6.1 kB

After Optimization

5.0 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Janson-de-sailly.fr main page is 6.1 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. Only 5% of websites need less resources to load. Images take 4.5 kB which makes up the majority of the site volume.

HTML Optimization

-61%

Potential reduce by 709 B

  • Original 1.2 kB
  • After minification 942 B
  • After compression 462 B

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 229 B, which is 20% 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 709 B or 61% of the original size.

Image Optimization

-7%

Potential reduce by 302 B

  • Original 4.5 kB
  • After minification 4.2 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. Janson De Sailly images are well optimized though.

JavaScript Optimization

-40%

Potential reduce by 171 B

  • Original 424 B
  • After minification 385 B
  • After compression 253 B

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 171 B or 40% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

9

After Optimization

9

  • AJAX
  • Images
  • JavaScript

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Janson De Sailly. According to our analytics all requests are already optimized.

Network Requests Diagram

janson-de-sailly.fr

janson-de-sailly.fr

309 ms

menu.php

menu.php

101 ms

principal.php

principal.php

174 ms

pied.html

pied.html

175 ms

fondjs.jpg

fondjs.jpg

96 ms

janson4.gif

janson4.gif

163 ms

banc.gif

banc.gif

163 ms

logo_men.jpg

logo_men.jpg

166 ms

jds1.gif

jds1.gif

188 ms

boutondroit.js

boutondroit.js

106 ms

Accessibility Review

janson-de-sailly.fr accessibility score

60

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.

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

janson-de-sailly.fr best practices score

77

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

janson-de-sailly.fr SEO score

79

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

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

    FR

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Janson-de-sailly.fr can be misinterpreted by Google and other search engines. Our service has detected that French 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 Janson-de-sailly.fr main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

janson-de-sailly.fr

Open Graph description is not detected on the main page of Janson De Sailly. 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: