Tools & Wizards About Us

Report Summary

  • 71

    Performance

    Renders faster than
    82% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 62% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

telefonbuch.de

Adressauskunft für Deutschland: Ihr Telefon- & Adressbuch seit 1881

Page Load Speed

3.3 sec in total

First Response

327 ms

Resources Loaded

2.4 sec

Page Rendered

629 ms

About Website

Visit telefonbuch.de now to see the best up-to-date Telefon Buch content for Germany and also check out these interesting facts you probably never knew about telefonbuch.de

Rufnummern & Adressen finden ✓ über 30 Mio. Einträge ✓ von Personen, Firmen u. a. m. ✓ Deutschlands beliebtes Adressbuch. Jetzt Adressauskunft nutzen!

Visit telefonbuch.de

Key Findings

We analyzed Telefonbuch.de page load time and found that the first response time was 327 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

telefonbuch.de performance score

71

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

59/100

25%

SI (Speed Index)

Value5.7 s

51/100

10%

TBT (Total Blocking Time)

Value190 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.1 s

63/100

10%

Network Requests Diagram

telefonbuch.de

327 ms

www.dastelefonbuch.de

255 ms

application_desktop_start-4980c18abd95f0e3cf33bdb4839bfb69.css

28 ms

cms_flexbox.css

529 ms

offer.css

665 ms

Our browser made a total of 55 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Telefonbuch.de, 33% (18 requests) were made to Medien.dastelefonbuch.de and 31% (17 requests) were made to Image.dastelefonbuch.de. The less responsive or slowest element that took the longest time to load (665 ms) relates to the external source Medien.dastelefonbuch.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 162.0 kB (21%)

Content Size

767.9 kB

After Optimization

605.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Telefonbuch.de main page is 767.9 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. 40% of websites need less resources to load. Images take 313.7 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 156.5 kB

  • Original 200.3 kB
  • After minification 179.7 kB
  • After compression 43.8 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 156.5 kB or 78% of the original size.

Image Optimization

-0%

Potential reduce by 43 B

  • Original 313.7 kB
  • After minification 313.6 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. Telefon Buch images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 1.4 kB

  • Original 196.8 kB
  • After minification 196.8 kB
  • After compression 195.4 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

-7%

Potential reduce by 4.1 kB

  • Original 57.1 kB
  • After minification 57.1 kB
  • After compression 53.1 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. Telefonbuch.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 13 (25%)

Requests Now

52

After Optimization

39

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Telefon Buch. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 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

telefonbuch.de accessibility score

86

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

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

telefonbuch.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

High

Page has valid source maps

SEO Factors

telefonbuch.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

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 doesn't use 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 Telefonbuch.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 Telefonbuch.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 data is detected on the main page of Telefon Buch. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: