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iso.fr screenshot

Report Summary

  • 8

    Performance

    Renders faster than
    22% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

iso.fr

Institut Supérieur d'Optique - Devenir un expert en Santé Visuelle - Formation Opticien

Page Load Speed

3.9 sec in total

First Response

277 ms

Resources Loaded

3.3 sec

Page Rendered

311 ms

iso.fr screenshot

About Website

Welcome to iso.fr homepage info - get ready to check Iso best content for France right away, or after learning these important things about iso.fr

Ecoles d'Optique n°1 en France. Nos écoles d'optique vous proposent des formations pour devenir Opticien en temps plein et en alternance

Visit iso.fr

Key Findings

We analyzed Iso.fr page load time and found that the first response time was 277 ms and then it took 3.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

iso.fr performance score

8

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value8.2 s

2/100

25%

SI (Speed Index)

Value9.2 s

13/100

10%

TBT (Total Blocking Time)

Value4,580 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.414

24/100

15%

TTI (Time to Interactive)

Value16.8 s

5/100

10%

Network Requests Diagram

iso.fr

277 ms

www.iso.fr

437 ms

slick.css

154 ms

colorbox.css

160 ms

magnific-popup.css

174 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 60% of them (43 requests) were addressed to the original Iso.fr, 7% (5 requests) were made to Fonts.gstatic.com and 6% (4 requests) were made to Img.youtube.com. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Iso.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.3 MB (52%)

Content Size

2.4 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Iso.fr main page is 2.4 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. 65% of websites need less resources to load. Javascripts take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 160.5 kB

  • Original 203.4 kB
  • After minification 198.2 kB
  • After compression 42.9 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 160.5 kB or 79% of the original size.

Image Optimization

-2%

Potential reduce by 15.6 kB

  • Original 717.5 kB
  • After minification 702.0 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. Iso images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 678.6 kB

  • Original 1.0 MB
  • After minification 1.0 MB
  • After compression 360.0 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 678.6 kB or 65% of the original size.

CSS Optimization

-84%

Potential reduce by 403.5 kB

  • Original 477.7 kB
  • After minification 471.3 kB
  • After compression 74.2 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. Iso.fr needs all CSS files to be minified and compressed as it can save up to 403.5 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 37 (57%)

Requests Now

65

After Optimization

28

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Iso. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

iso.fr

iso.fr

277 ms

www.iso.fr

www.iso.fr

437 ms

slick.css

slick.css

154 ms

colorbox.css

colorbox.css

160 ms

magnific-popup.css

magnific-popup.css

174 ms

bootstrap.3.1.1.min.css

bootstrap.3.1.1.min.css

263 ms

default.css

default.css

182 ms

css

css

25 ms

jquery.min.js

jquery.min.js

8 ms

slick.min.js

slick.min.js

7 ms

jquery.validate.min.js

jquery.validate.min.js

60 ms

additional-methods.min.js

additional-methods.min.js

30 ms

magnific-popup.js

magnific-popup.js

108 ms

jquery.colorbox-min.js

jquery.colorbox-min.js

160 ms

app.js

app.js

166 ms

addthis_widget.js

addthis_widget.js

14 ms

cookieconsent.min.js

cookieconsent.min.js

14 ms

analytics.js

analytics.js

134 ms

fbevents.js

fbevents.js

135 ms

default.jpg

default.jpg

124 ms

default.jpg

default.jpg

120 ms

default.jpg

default.jpg

120 ms

default.jpg

default.jpg

125 ms

header-top-language-english.png

header-top-language-english.png

121 ms

header-top-language-chinese.png

header-top-language-chinese.png

122 ms

header-top-language-french.png

header-top-language-french.png

121 ms

header-top-home.png

header-top-home.png

123 ms

header-top-socials-facebook.png

header-top-socials-facebook.png

123 ms

header-top-socials-youtube.png

header-top-socials-youtube.png

122 ms

header-top-socials-twitter.png

header-top-socials-twitter.png

229 ms

header-top-socials-instagram.png

header-top-socials-instagram.png

228 ms

header-top-socials-linkedin.png

header-top-socials-linkedin.png

228 ms

header-logo.png

header-logo.png

275 ms

header-main-search-icon.png

header-main-search-icon.png

228 ms

99e11f60-86cb-47f0-9d98-4622a742a28e-1024x457.jpg

99e11f60-86cb-47f0-9d98-4622a742a28e-1024x457.jpg

2286 ms

pixel-1d437d-75.png

pixel-1d437d-75.png

276 ms

1_30-1024x457.jpg

1_30-1024x457.jpg

2300 ms

international1.jpg

international1.jpg

2296 ms

PEDAGOGIE-974x457.jpg

PEDAGOGIE-974x457.jpg

2296 ms

homepage-cursus-paramedical-image.png

homepage-cursus-paramedical-image.png

369 ms

Baars_Eyewear1-190x128.jpg

Baars_Eyewear1-190x128.jpg

370 ms

SOLEO_1-e1456747021871-190x128.jpg

SOLEO_1-e1456747021871-190x128.jpg

2283 ms

AnSoStyle_YouTubeuse-190x128.jpg

AnSoStyle_YouTubeuse-190x128.jpg

2284 ms

homepage-agenda-calendar.png

homepage-agenda-calendar.png

2284 ms

homepage-iso-tv.png

homepage-iso-tv.png

2285 ms

homepage-sites-image.jpg

homepage-sites-image.jpg

2286 ms

pixel-071c3a-75.png

pixel-071c3a-75.png

2287 ms

homepage-sites-image-2.jpg

homepage-sites-image-2.jpg

2298 ms

homepage-sites-image-3.jpg

homepage-sites-image-3.jpg

2296 ms

homepage-sites-image-4.jpg

homepage-sites-image-4.jpg

2297 ms

homepage-sites-map.png

homepage-sites-map.png

2298 ms

footer-nav-related-arrow.png

footer-nav-related-arrow.png

2299 ms

header-top-socials-youtube-black.png

header-top-socials-youtube-black.png

2299 ms

qhLM6v31mOs

qhLM6v31mOs

152 ms

k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf

k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf

65 ms

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

66 ms

DXI1ORHCpsQm3Vp6mXoaTYnF5uFdDttMLvmWuJdhhgs.ttf

DXI1ORHCpsQm3Vp6mXoaTYnF5uFdDttMLvmWuJdhhgs.ttf

104 ms

300lo.json

300lo.json

48 ms

homepage-featured-left-arrow.png

homepage-featured-left-arrow.png

2115 ms

homepage-featured-right-arrow.png

homepage-featured-right-arrow.png

2116 ms

ajax-loader.gif

ajax-loader.gif

2115 ms

collect

collect

33 ms

54 ms

sh.8e5f85691f9aaa082472a194.html

sh.8e5f85691f9aaa082472a194.html

28 ms

59 ms

layers.e5ea973510bf60b3db41.js

layers.e5ea973510bf60b3db41.js

15 ms

www-embed-player-vflfNyN_r.css

www-embed-player-vflfNyN_r.css

101 ms

www-embed-player.js

www-embed-player.js

116 ms

Lrq7Jibxdtv2QOPyDSqncpDfQFNs3PE6SoUrUNh2GTU.js

Lrq7Jibxdtv2QOPyDSqncpDfQFNs3PE6SoUrUNh2GTU.js

74 ms

ad_status.js

ad_status.js

45 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

21 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

30 ms

Accessibility Review

iso.fr accessibility score

88

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

iso.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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

iso.fr SEO score

84

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

High

Tap targets are not sized appropriately

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 Iso.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 Iso.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

iso.fr

Open Graph data is detected on the main page of Iso. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: