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opto4u.com screenshot

Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

opto4u.com

opto4u your source for optomecanics and optics - Opto4U

Page Load Speed

2.4 sec in total

First Response

450 ms

Resources Loaded

1.7 sec

Page Rendered

255 ms

opto4u.com screenshot

About Website

Welcome to opto4u.com homepage info - get ready to check Opto4U best content right away, or after learning these important things about opto4u.com

Thanks to our 30 years of experience in optic and laser industry, we are able to service and supply the most demanding applications required by complex industrial and scientific projects.

Visit opto4u.com

Key Findings

We analyzed Opto4u.com page load time and found that the first response time was 450 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

opto4u.com performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value5.3 s

21/100

25%

SI (Speed Index)

Value4.8 s

68/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.005

100/100

15%

TTI (Time to Interactive)

Value3.5 s

92/100

10%

Network Requests Diagram

opto4u.com

450 ms

grid_prestashop.css

100 ms

global.css

192 ms

blockpermanentlinks.css

197 ms

blockviewed.css

198 ms

Our browser made a total of 62 requests to load all elements on the main page. We found that all of those requests were addressed to Opto4u.com and no external sources were called. The less responsive or slowest element that took the longest time to load (620 ms) belongs to the original domain Opto4u.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 58.3 kB (18%)

Content Size

331.7 kB

After Optimization

273.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Opto4u.com main page is 331.7 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. 25% of websites need less resources to load. Images take 209.5 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 39.7 kB

  • Original 47.4 kB
  • After minification 43.2 kB
  • After compression 7.7 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 39.7 kB or 84% of the original size.

Image Optimization

-3%

Potential reduce by 6.6 kB

  • Original 209.5 kB
  • After minification 202.9 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. Opto4U images are well optimized though.

JavaScript Optimization

-12%

Potential reduce by 6.8 kB

  • Original 56.0 kB
  • After minification 55.5 kB
  • After compression 49.1 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 6.8 kB or 12% of the original size.

CSS Optimization

-27%

Potential reduce by 5.1 kB

  • Original 18.8 kB
  • After minification 18.8 kB
  • After compression 13.7 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. Opto4u.com needs all CSS files to be minified and compressed as it can save up to 5.1 kB or 27% of the original size.

Requests Breakdown

Number of requests can be reduced by 40 (66%)

Requests Now

61

After Optimization

21

  • Images
  • JavaScript
  • CSS

The browser has sent 61 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Opto4U. 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 15 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

opto4u.com

opto4u.com

450 ms

grid_prestashop.css

grid_prestashop.css

100 ms

global.css

global.css

192 ms

blockpermanentlinks.css

blockpermanentlinks.css

197 ms

blockviewed.css

blockviewed.css

198 ms

blockcart.css

blockcart.css

198 ms

blockcurrencies.css

blockcurrencies.css

199 ms

blockmyaccount.css

blockmyaccount.css

198 ms

blockuserinfo.css

blockuserinfo.css

286 ms

favoriteproducts.css

favoriteproducts.css

287 ms

homefeatured.css

homefeatured.css

293 ms

editorial.css

editorial.css

294 ms

productscategory.css

productscategory.css

293 ms

mailalerts.css

mailalerts.css

294 ms

superfish-modified.css

superfish-modified.css

381 ms

bx_styles.css

bx_styles.css

379 ms

jquery-1.7.2.min.js

jquery-1.7.2.min.js

589 ms

jquery.easing.js

jquery.easing.js

398 ms

tools.js

tools.js

389 ms

ajax-cart.js

ajax-cart.js

395 ms

treeManagement.js

treeManagement.js

473 ms

favoriteproducts.js

favoriteproducts.js

472 ms

productscategory.js

productscategory.js

485 ms

jquery.serialScroll.js

jquery.serialScroll.js

493 ms

hoverIntent.js

hoverIntent.js

493 ms

superfish-modified.js

superfish-modified.js

565 ms

jquery.bxSlider.min.js

jquery.bxSlider.min.js

567 ms

homeslider.js

homeslider.js

582 ms

shinedotted.png

shinedotted.png

99 ms

header-background.jpg

header-background.jpg

100 ms

logo-1.jpg

logo-1.jpg

99 ms

opto4u_cata15.jpg

opto4u_cata15.jpg

95 ms

France.png

France.png

99 ms

Italy.png

Italy.png

95 ms

Germany.png

Germany.png

189 ms

aa4d810c5dcc09f851f32bb2d571dc84.jpg

aa4d810c5dcc09f851f32bb2d571dc84.jpg

374 ms

e61847ec97c080b885196a19ae233353.jpg

e61847ec97c080b885196a19ae233353.jpg

388 ms

OP_Cal_2024_smol.JPG

OP_Cal_2024_smol.JPG

389 ms

800-nm-flat-mirror.jpg

800-nm-flat-mirror.jpg

195 ms

kinematic-open-mirror-mount-with-2-adjusters-optics-o-25-254-mm.jpg

kinematic-open-mirror-mount-with-2-adjusters-optics-o-25-254-mm.jpg

195 ms

optics-cleaning-kit.jpg

optics-cleaning-kit.jpg

283 ms

rigid-frame-.jpg

rigid-frame-.jpg

293 ms

stage.jpg

stage.jpg

293 ms

casters-for-breadboard-support-frame.jpg

casters-for-breadboard-support-frame.jpg

377 ms

flip-mount.jpg

flip-mount.jpg

390 ms

350-1100-nm-flat-mirror.jpg

350-1100-nm-flat-mirror.jpg

390 ms

kinematic-mirror-mount-with-3-adjusters-optics-o-125-127-mm.jpg

kinematic-mirror-mount-with-3-adjusters-optics-o-125-127-mm.jpg

466 ms

kinematic-lens-mirror-mount-with-4-adjusters-optics-o-25-25-4-mm.jpg

kinematic-lens-mirror-mount-with-4-adjusters-optics-o-25-25-4-mm.jpg

474 ms

block_languages_top_p_bg.png

block_languages_top_p_bg.png

477 ms

cart.gif

cart.gif

476 ms

login.gif

login.gif

477 ms

search.gif

search.gif

476 ms

arrow_right_2.png

arrow_right_2.png

547 ms

arrow_right_2.png

arrow_right_2.png

545 ms

arrow_right_1.png

arrow_right_1.png

523 ms

bg_bt.gif

bg_bt.gif

524 ms

bg_bt_2.gif

bg_bt_2.gif

525 ms

footer-background.jpg

footer-background.jpg

526 ms

arrows-ffffff.png

arrows-ffffff.png

595 ms

shadow.png

shadow.png

602 ms

open-close.png

open-close.png

619 ms

gray_pager.png

gray_pager.png

620 ms

Accessibility Review

opto4u.com accessibility score

75

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.

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

Form elements do not have associated labels

Best Practices

opto4u.com best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

opto4u.com SEO score

62

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

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Opto4u.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 Opto4u.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

opto4u.com

Open Graph description is not detected on the main page of Opto4U. 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: