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netzoptiker.de screenshot

Report Summary

  • 6

    Performance

    Renders faster than
    21% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

netzoptiker.de

Lensbest.de - Kontaktlinsen & Pflegemittel online kaufen

Page Load Speed

4.2 sec in total

First Response

396 ms

Resources Loaded

3.3 sec

Page Rendered

481 ms

netzoptiker.de screenshot

About Website

Welcome to netzoptiker.de homepage info - get ready to check Netzoptiker best content for Germany right away, or after learning these important things about netzoptiker.de

Online-Shop für Kontaktlinsen und Pflegemittel ✓ Über 1 Mio. zufriedene Kunden ✓ Kauf auf Rechnung ✓ 30 Tage Geld-zurück-Garantie

Visit netzoptiker.de

Key Findings

We analyzed Netzoptiker.de page load time and found that the first response time was 396 ms and then it took 3.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

netzoptiker.de performance score

6

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

24/100

10%

LCP (Largest Contentful Paint)

Value9.0 s

1/100

25%

SI (Speed Index)

Value8.6 s

17/100

10%

TBT (Total Blocking Time)

Value3,620 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.624

10/100

15%

TTI (Time to Interactive)

Value21.6 s

1/100

10%

Network Requests Diagram

netzoptiker.de

396 ms

netzoptiker.de

441 ms

www.netzoptiker.de

567 ms

www.lensbest.de

878 ms

jquery-3.7.1.min.js

292 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 4% of them (3 requests) were addressed to the original Netzoptiker.de, 68% (49 requests) were made to Res.cloudinary.com and 17% (12 requests) were made to Lensbest.de. The less responsive or slowest element that took the longest time to load (878 ms) relates to the external source Lensbest.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 485.7 kB (27%)

Content Size

1.8 MB

After Optimization

1.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Netzoptiker.de main page is 1.8 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 975.1 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 125.3 kB

  • Original 160.5 kB
  • After minification 159.1 kB
  • After compression 35.3 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 125.3 kB or 78% of the original size.

Image Optimization

-13%

Potential reduce by 122.2 kB

  • Original 975.1 kB
  • After minification 852.9 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. Obviously, Netzoptiker needs image optimization as it can save up to 122.2 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

-38%

Potential reduce by 238.1 kB

  • Original 622.1 kB
  • After minification 622.0 kB
  • After compression 384.0 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 238.1 kB or 38% of the original size.

CSS Optimization

-0%

Potential reduce by 133 B

  • Original 73.0 kB
  • After minification 73.0 kB
  • After compression 72.9 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. Netzoptiker.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 10 (16%)

Requests Now

64

After Optimization

54

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 64 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Netzoptiker. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

netzoptiker.de

netzoptiker.de

396 ms

netzoptiker.de

netzoptiker.de

441 ms

www.netzoptiker.de

www.netzoptiker.de

567 ms

www.lensbest.de

www.lensbest.de

878 ms

jquery-3.7.1.min.js

jquery-3.7.1.min.js

292 ms

global.min.js

global.min.js

379 ms

jquery-migrate-3.3.0.min.js

jquery-migrate-3.3.0.min.js

383 ms

GetExternalizedStrings-Start;pgid=i2FgKDOcOJhSRpX2LrQecS8p0000YpOLKrf9;sid=NpPqOIOneNHrOOWfWnqaritnd4ZyQWei1Gk_1XvAPTZq4A==

GetExternalizedStrings-Start;pgid=i2FgKDOcOJhSRpX2LrQecS8p0000YpOLKrf9;sid=NpPqOIOneNHrOOWfWnqaritnd4ZyQWei1Gk_1XvAPTZq4A==

468 ms

loader.js

loader.js

50 ms

gtm.js

gtm.js

189 ms

payment.png

payment.png

172 ms

visualShoppingTextTool.css

visualShoppingTextTool.css

461 ms

global.min.css

global.min.css

685 ms

empty.gif

empty.gif

154 ms

mobile_ST_Briefkastenfreundliche_Verpackung_B1_V02.gif

mobile_ST_Briefkastenfreundliche_Verpackung_B1_V02.gif

158 ms

mobile_ST_Alcon_Gewinnspiel_2x_Apple_Watch_240315_A1_V02.jpg

mobile_ST_Alcon_Gewinnspiel_2x_Apple_Watch_240315_A1_V02.jpg

156 ms

3er-box_1_2019_B1.jpg

3er-box_1_2019_B1.jpg

156 ms

3er-box_2023_Pflegemittel_A1.jpg

3er-box_2023_Pflegemittel_A1.jpg

156 ms

3er-box_2023_Zubehoer_A1.jpg

3er-box_2023_Zubehoer_A1.jpg

158 ms

3er-box_2019_C1_V05.jpg

3er-box_2019_C1_V05.jpg

157 ms

Kontaktlinsen_Box_Lenscare_A2.jpg

Kontaktlinsen_Box_Lenscare_A2.jpg

158 ms

Kontaktlinsen_Box_Everclear_B2.jpg

Kontaktlinsen_Box_Everclear_B2.jpg

160 ms

Kontaktlinsen_Box_Acuvue_A2.jpg

Kontaktlinsen_Box_Acuvue_A2.jpg

161 ms

Kontaktlinsen_Box_TOTAL_A2.jpg

Kontaktlinsen_Box_TOTAL_A2.jpg

159 ms

beratungsbilder_kontaktlinsenberater_A1_V02.jpg

beratungsbilder_kontaktlinsenberater_A1_V02.jpg

160 ms

beratungsbilder_Pflegemittelberater_A1_V02.jpg

beratungsbilder_Pflegemittelberater_A1_V02.jpg

161 ms

beratungsbilder_Testlinsen_A1_V02.jpg

beratungsbilder_Testlinsen_A1_V02.jpg

162 ms

beratungsbilder_Starter-Sets_A1_V02.jpg

beratungsbilder_Starter-Sets_A1_V02.jpg

161 ms

Pflegemittel_Box_Lenscare_B1.jpg

Pflegemittel_Box_Lenscare_B1.jpg

163 ms

Pflegemittel_Box_Bausch_Lomb_B1.jpg

Pflegemittel_Box_Bausch_Lomb_B1.jpg

164 ms

Pflegemittel_Box_Alcon_B1.jpg

Pflegemittel_Box_Alcon_B1.jpg

162 ms

Pflegemittel_Box_AMO_B1.jpg

Pflegemittel_Box_AMO_B1.jpg

164 ms

beratungsbilder_Dioprientauschservice_A1_V02.jpg

beratungsbilder_Dioprientauschservice_A1_V02.jpg

164 ms

beratungsbilder_Spar_Abo_A1_V02.jpg

beratungsbilder_Spar_Abo_A1_V02.jpg

165 ms

beratungsbilder_1-Klick_Nachbestellung_A1_V03.jpg

beratungsbilder_1-Klick_Nachbestellung_A1_V03.jpg

226 ms

beratungsbilder_Geld_B1_V02

beratungsbilder_Geld_B1_V02

276 ms

Teaser_Ausgediente_Kontaktlinsen_235x300_A1.jpg

Teaser_Ausgediente_Kontaktlinsen_235x300_A1.jpg

276 ms

Kontaktlinsen-einsetzen_235x300_A1.jpg

Kontaktlinsen-einsetzen_235x300_A1.jpg

275 ms

Tragedauer_KL-235x300.jpg

Tragedauer_KL-235x300.jpg

275 ms

Schlafen-235x300_A1.jpg

Schlafen-235x300_A1.jpg

275 ms

Verschwommene_Sicht_235x300_A1.jpg

Verschwommene_Sicht_235x300_A1.jpg

275 ms

Teaser_Kontaktlinsen-Werte-Parameter_235x300_A1.jpg

Teaser_Kontaktlinsen-Werte-Parameter_235x300_A1.jpg

278 ms

Linse-235x300_ReDe_A1.jpg

Linse-235x300_ReDe_A1.jpg

278 ms

OpenSans.woff

OpenSans.woff

277 ms

OpenSans-Light.woff

OpenSans-Light.woff

277 ms

OpenSans-Semibold.woff

OpenSans-Semibold.woff

277 ms

bundle_legacy.js

bundle_legacy.js

15 ms

retinafont.woff

retinafont.woff

53 ms

destination

destination

44 ms

languages.json

languages.json

160 ms

icons-social.png

icons-social.png

73 ms

picturefill.min.js

picturefill.min.js

122 ms

ST_SH-System_Plus_Monatslinsen_Starter-Set_A1_V02.jpg

ST_SH-System_Plus_Monatslinsen_Starter-Set_A1_V02.jpg

83 ms

ViewCart-Mini;pgid=i2FgKDOcOJhSRpX2LrQecS8p0000YpOLKrf9;sid=NpPqOIOneNHrOOWfWnqaritnd4ZyQWei1Gk_1XvAPTZq4A==

ViewCart-Mini;pgid=i2FgKDOcOJhSRpX2LrQecS8p0000YpOLKrf9;sid=NpPqOIOneNHrOOWfWnqaritnd4ZyQWei1Gk_1XvAPTZq4A==

171 ms

ViewWishlist-IncludeWishlistArray;pgid=i2FgKDOcOJhSRpX2LrQecS8p0000YpOLKrf9;sid=NpPqOIOneNHrOOWfWnqaritnd4ZyQWei1Gk_1XvAPTZq4A==

ViewWishlist-IncludeWishlistArray;pgid=i2FgKDOcOJhSRpX2LrQecS8p0000YpOLKrf9;sid=NpPqOIOneNHrOOWfWnqaritnd4ZyQWei1Gk_1XvAPTZq4A==

185 ms

menu;pgid=i2FgKDOcOJhSRpX2LrQecS8p0000YpOLKrf9;sid=NpPqOIOneNHrOOWfWnqaritnd4ZyQWei1Gk_1XvAPTZq4A==

menu;pgid=i2FgKDOcOJhSRpX2LrQecS8p0000YpOLKrf9;sid=NpPqOIOneNHrOOWfWnqaritnd4ZyQWei1Gk_1XvAPTZq4A==

121 ms

ST_Briefkastenfreundliche_Verpackung_A1_V02.jpg

ST_Briefkastenfreundliche_Verpackung_A1_V02.jpg

107 ms

ST_Alcon_Gewinnspiel_2x_Apple_Watch_240315_A1_V02.jpg

ST_Alcon_Gewinnspiel_2x_Apple_Watch_240315_A1_V02.jpg

101 ms

tp.widget.bootstrap.min.js

tp.widget.bootstrap.min.js

100 ms

slick.min.js

slick.min.js

110 ms

payment_202207.png

payment_202207.png

72 ms

icons-social.png

icons-social.png

61 ms

menueleiste_beratung_kontaktlinsen_ReDe_A2_V02.jpg

menueleiste_beratung_kontaktlinsen_ReDe_A2_V02.jpg

179 ms

empty.gif

empty.gif

25 ms

shop_lensbest_500x1000_brillen_text.jpg

shop_lensbest_500x1000_brillen_text.jpg

50 ms

brille24_brillen.jpg

brille24_brillen.jpg

50 ms

shop_lensbest_500x1000_sonnenbrillen_text.jpg

shop_lensbest_500x1000_sonnenbrillen_text.jpg

27 ms

brille24_sonnenbrillen.jpg

brille24_sonnenbrillen.jpg

51 ms

empty.gif

empty.gif

51 ms

menuleiste_Welche_Kontaktlinsen_passen_zu_mir_ReDe_A1_V02.jpg

menuleiste_Welche_Kontaktlinsen_passen_zu_mir_ReDe_A1_V02.jpg

56 ms

de.json

de.json

101 ms

1px.png

1px.png

9 ms

Accessibility Review

netzoptiker.de accessibility score

65

Accessibility Issues

ARIA

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.

Impact

Issue

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

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

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

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

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

netzoptiker.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

Page has valid source maps

SEO Factors

netzoptiker.de SEO score

83

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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Netzoptiker.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 Netzoptiker.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

netzoptiker.de

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