Tools & Wizards About Us

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

krass-optik.de

Brillen, Sonnenbrillen & Kontaktlinsen online kaufen | KRASS Optik

Page Load Speed

8 sec in total

First Response

224 ms

Resources Loaded

6.9 sec

Page Rendered

845 ms

About Website

Welcome to krass-optik.de homepage info - get ready to check KRASS Optik best content right away, or after learning these important things about krass-optik.de

Modische Brillen, coole Sonnenbrillen und Kontaktlinsen online in Sehstärke bestellen ✔ Brillen und Sonnenbrillen online anprobieren ✔ Erstklassiger Service in über 80 Filialen ✔

Visit krass-optik.de

Key Findings

We analyzed Krass-optik.de page load time and found that the first response time was 224 ms and then it took 7.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

krass-optik.de performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

66/100

10%

LCP (Largest Contentful Paint)

Value27.1 s

0/100

25%

SI (Speed Index)

Value14.0 s

1/100

10%

TBT (Total Blocking Time)

Value1,050 ms

25/100

30%

CLS (Cumulative Layout Shift)

Value0.059

98/100

15%

TTI (Time to Interactive)

Value32.2 s

0/100

10%

Network Requests Diagram

krass-optik.de

224 ms

www.krass-optik.com

504 ms

calendar.min.css

90 ms

styles.min.css

271 ms

leaflet.min.css

264 ms

Our browser made a total of 141 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Krass-optik.de, 96% (136 requests) were made to Krass-optik.com and 1% (1 request) were made to App.usercentrics.eu. The less responsive or slowest element that took the longest time to load (5.4 sec) relates to the external source Krass-optik.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 972.1 kB (14%)

Content Size

6.8 MB

After Optimization

5.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Krass-optik.de main page is 6.8 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. 45% of websites need less resources to load. Images take 6.1 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 141.7 kB

  • Original 176.3 kB
  • After minification 162.4 kB
  • After compression 34.6 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 141.7 kB or 80% of the original size.

Image Optimization

-13%

Potential reduce by 823.8 kB

  • Original 6.1 MB
  • After minification 5.3 MB

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, KRASS Optik needs image optimization as it can save up to 823.8 kB or 13% 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 6.5 kB

  • Original 451.0 kB
  • After minification 451.0 kB
  • After compression 444.5 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

-0%

Potential reduce by 99 B

  • Original 58.4 kB
  • After minification 58.4 kB
  • After compression 58.3 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. Krass-optik.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 121 (89%)

Requests Now

136

After Optimization

15

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 136 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KRASS Optik. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 118 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

krass-optik.de accessibility score

77

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

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

krass-optik.de best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

krass-optik.de SEO score

92

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

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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

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

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