Access optical-center.eu. Optical Center le meilleur de l'optique en Ligne

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

39/100

10%

LCP (Largest Contentful Paint)

Value11.4 s

0/100

25%

SI (Speed Index)

Value13.7 s

2/100

10%

TBT (Total Blocking Time)

Value11,630 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value18.1 s

3/100

10%

www.optical-center.fr

728 ms

icon

99 ms

https3modules_FrontEnd_listCss.css

792 ms

css

99 ms

css2

99 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Optical-center.eu, 13% (9 requests) were made to Fonts.gstatic.com and 8% (6 requests) were made to J2.optical-center.fr. The less responsive or slowest element that took the longest time to load (3.8 sec) relates to the external source I2.optical-center.fr.

Content Size

1.2 MB

After Optimization

914.0 kB

In fact, the total size of Optical-center.eu main page is 1.2 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. 70% of websites need less resources to load. Images take 867.7 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 116.9 kB

Original 138.6 kB
After minification 137.8 kB
After compression 21.7 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 116.9 kB or 84% of the original size.

Image Optimization

-16%

Potential reduce by 140.0 kB

Original 867.7 kB
After minification 727.8 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, Optical Center needs image optimization as it can save up to 140.0 kB or 16% 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 493 B

Original 93.8 kB
After minification 93.8 kB
After compression 93.3 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

-12%

Potential reduce by 9.7 kB

Original 80.9 kB
After minification 80.9 kB
After compression 71.2 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. Optical-center.eu needs all CSS files to be minified and compressed as it can save up to 9.7 kB or 12% of the original size.

Requests Now

After Optimization

The browser has sent 60 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Optical Center. 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 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

ARIA IDs are not unique

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.

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

These items highlight common accessibility best practices.

High

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

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

FR
Language Claimed

FR
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Optical-center.eu can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and it matches the claimed language. Our system also found out that Optical-center.eu 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

optical-center.eu

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Optical Center le meilleur de l'optique en Ligne

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

www.optical-center.fr

icon

https3modules_FrontEnd_listCss.css

css

css2

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

www.optical-center.fr

icon

https3modules_FrontEnd_listCss.css

css

css2

instafeed.min.js

iframe_api

jquery-3.4.1.min.js

jssor.slider-22.2.10.mini.js

https3tpl_frontend_js_facebox.js

https3modules_FrontEnd_listJs.js

lazyload.min.js

jquery.jcarousel.min.js

sdk.js

jquery.nivo.slider.pack.3.2.js

https3tpl_frontend_js_jquery.mousewheel.min.js

https3tpl_frontend_js_jquery.sliderkit.1.9.1.pack.js

https3includes_scripts_jquery.jcarousel.min.js

https3tpl_frontend_js_swiper.min.js

left-alignment.png

logo-oc-blanc-fr.svg

france.svg

down-arrow.svg

icon-search.svg

icon-store.svg

FR-1080x1080-offre-janvier-220522.png

icon-shopping-bag.svg

switzerland.svg

Spin.gif

icon-user.svg

glasses-shape-rectangle.svg

glasses-shape-square.svg

glasses-shape-oval.svg

glasses-shape-rond.svg

glasses-shape-vintage.svg

glasses-shape-aviator.svg

glasses-shape-butterfly.svg

glasses-shape-clubmaster.svg

glasses-shape-cateye.svg

glasses-shape-hexagonale.svg

facebook-icon-blanc.svg

instagram-icon-blanc.svg

pinterest-icon-blanc.svg