Tools & Wizards About Us
booklooker.com screenshot

Report Summary

  • 31

    Performance

    Renders faster than
    51% of other websites

  • 99

    Accessibility

    Visual factors better than
    that of 96% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 80

    SEO

    Google-friendlier than
    42% of websites

booklooker.com

booklooker.de: antiquarische und gebrauchte Bücher kaufen und verkaufen, Hörbücher, CDs, Filme und Spiele

Page Load Speed

3 sec in total

First Response

308 ms

Resources Loaded

2.4 sec

Page Rendered

275 ms

booklooker.com screenshot

About Website

Click here to check amazing Booklooker content. Otherwise, check out these important facts you probably never knew about booklooker.com

Marktplatz für gebrauchte & antiquarische Bücher ✓ kaufen & verkaufen ✓ Preisvergleich ✓ Käuferschutz ✓ Wir ♥ Bücher!

Visit booklooker.com

Key Findings

We analyzed Booklooker.com page load time and found that the first response time was 308 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

booklooker.com performance score

31

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

38/100

10%

LCP (Largest Contentful Paint)

Value7.5 s

4/100

25%

SI (Speed Index)

Value5.2 s

59/100

10%

TBT (Total Blocking Time)

Value2,410 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0.01

100/100

15%

TTI (Time to Interactive)

Value8.3 s

40/100

10%

Network Requests Diagram

booklooker.com

308 ms

www.booklooker.de

747 ms

font__2407081231.css

193 ms

jquery.ui.autocomplete.min.css

515 ms

booklooker.gen__2407081231.css

394 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Booklooker.com, 45% (15 requests) were made to Booklooker.de and 27% (9 requests) were made to Images.booklooker.de. The less responsive or slowest element that took the longest time to load (853 ms) relates to the external source Images.booklooker.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 69.7 kB (25%)

Content Size

279.2 kB

After Optimization

209.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Booklooker.com main page is 279.2 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. Javascripts take 91.3 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 51.6 kB

  • Original 61.6 kB
  • After minification 58.2 kB
  • After compression 10.0 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 51.6 kB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 2 B

  • Original 77.4 kB
  • After minification 77.4 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. Booklooker images are well optimized though.

JavaScript Optimization

-8%

Potential reduce by 7.6 kB

  • Original 91.3 kB
  • After minification 91.3 kB
  • After compression 83.7 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

-22%

Potential reduce by 10.6 kB

  • Original 49.0 kB
  • After minification 49.0 kB
  • After compression 38.4 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. Booklooker.com needs all CSS files to be minified and compressed as it can save up to 10.6 kB or 22% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (27%)

Requests Now

30

After Optimization

22

  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Booklooker. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

booklooker.com

booklooker.com

308 ms

www.booklooker.de

www.booklooker.de

747 ms

font__2407081231.css

font__2407081231.css

193 ms

jquery.ui.autocomplete.min.css

jquery.ui.autocomplete.min.css

515 ms

booklooker.gen__2407081231.css

booklooker.gen__2407081231.css

394 ms

cookieyes_custom__2407081231.js

cookieyes_custom__2407081231.js

392 ms

google_tag_manager__2407081231.js

google_tag_manager__2407081231.js

391 ms

script.js

script.js

44 ms

jquery.min.js

jquery.min.js

546 ms

jquery.hoverIntent.min.js

jquery.hoverIntent.min.js

545 ms

main__2407081231.js

main__2407081231.js

313 ms

jquery.ui.autocomplete.min.js

jquery.ui.autocomplete.min.js

545 ms

jquery.ui.autocomplete.html.js

jquery.ui.autocomplete.html.js

542 ms

gtm.js

gtm.js

169 ms

log

log

485 ms

bewertungen_hd_mobile.png

bewertungen_hd_mobile.png

190 ms

Elke-Heidenreich+Altern.jpg

Elke-Heidenreich+Altern.jpg

663 ms

Jean-Luc-Bannalec+Bretonische-Sehnsucht-Kommissar-Dupins-dreizehnter-Fall.jpg

Jean-Luc-Bannalec+Bretonische-Sehnsucht-Kommissar-Dupins-dreizehnter-Fall.jpg

669 ms

Sa%C5%A1a-Stani%C5%A1i%C4%87+M%C3%B6chte-die-Witwe-angesprochen-werden-platziert-sie-auf-dem-Grab-die-Gie%C3%9Fkanne-mit-dem.jpg

Sa%C5%A1a-Stani%C5%A1i%C4%87+M%C3%B6chte-die-Witwe-angesprochen-werden-platziert-sie-auf-dem-Grab-die-Gie%C3%9Fkanne-mit-dem.jpg

667 ms

Sebastian-Fitzek+Der-Insasse-Psychothriller.jpg

Sebastian-Fitzek+Der-Insasse-Psychothriller.jpg

670 ms

Miranda-July+Auf-allen-vieren.jpg

Miranda-July+Auf-allen-vieren.jpg

671 ms

Axel-Hacke+%C3%9Cber-die-Heiterkeit-in-schwierigen-Zeiten-und-die-Frage-wie-wichtig-uns-der-Ernst-des.jpg

Axel-Hacke+%C3%9Cber-die-Heiterkeit-in-schwierigen-Zeiten-und-die-Frage-wie-wichtig-uns-der-Ernst-des.jpg

771 ms

Jessie-Inchausp%C3%A9+Der-Glukose-Trick-Schluss-mit-Hei%C3%9Fhunger-schlechter-Haut-und-Stimmungstiefs-wie-man.jpg

Jessie-Inchausp%C3%A9+Der-Glukose-Trick-Schluss-mit-Hei%C3%9Fhunger-schlechter-Haut-und-Stimmungstiefs-wie-man.jpg

853 ms

Gaea-Schoeters+Troph%C3%A4e.jpg

Gaea-Schoeters+Troph%C3%A4e.jpg

770 ms

Bernhard-Schlink+Das-sp%C3%A4te-Leben.jpg

Bernhard-Schlink+Das-sp%C3%A4te-Leben.jpg

767 ms

booklooker-logo.svg

booklooker-logo.svg

159 ms

basket.svg

basket.svg

156 ms

bewertungen_hd.png

bewertungen_hd.png

155 ms

english.svg

english.svg

161 ms

mediatype.svg

mediatype.svg

255 ms

makepage.svg

makepage.svg

359 ms

infobox.svg

infobox.svg

254 ms

dummy.gif

dummy.gif

252 ms

Accessibility Review

booklooker.com accessibility score

99

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

booklooker.com best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

booklooker.com SEO score

80

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Page is blocked from indexing

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 Booklooker.com 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 Booklooker.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

booklooker.com

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