Tools & Wizards About Us
booklooker.de screenshot

Report Summary

  • 87

    Performance

    Renders faster than
    90% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 87

    SEO

    Google-friendlier than
    66% of websites

booklooker.de

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

Page Load Speed

1.9 sec in total

First Response

332 ms

Resources Loaded

1.4 sec

Page Rendered

143 ms

booklooker.de screenshot

About Website

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

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

Visit booklooker.de

Key Findings

We analyzed Booklooker.de page load time and found that the first response time was 332 ms and then it took 1.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

booklooker.de performance score

87

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

54/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

78/100

25%

SI (Speed Index)

Value4.0 s

81/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value3.4 s

93/100

10%

Network Requests Diagram

www.booklooker.de

332 ms

booklooker.gen__1602261327.css

186 ms

jquery-ui.css

79 ms

jquery.cluetip__1602261327.css

179 ms

shariff__1602261327.css

181 ms

Our browser made a total of 48 requests to load all elements on the main page. We found that 52% of them (25 requests) were addressed to the original Booklooker.de, 21% (10 requests) were made to Images2.booklooker.de and 10% (5 requests) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (758 ms) relates to the external source Images2.booklooker.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 848.9 kB (65%)

Content Size

1.3 MB

After Optimization

461.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Booklooker.de main page is 1.3 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. 35% of websites need less resources to load. Javascripts take 846.6 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 22.5 kB

  • Original 28.8 kB
  • After minification 26.2 kB
  • After compression 6.3 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 22.5 kB or 78% of the original size.

Image Optimization

-2%

Potential reduce by 3.7 kB

  • Original 166.1 kB
  • After minification 162.4 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

-71%

Potential reduce by 604.2 kB

  • Original 846.6 kB
  • After minification 815.7 kB
  • After compression 242.4 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 604.2 kB or 71% of the original size.

CSS Optimization

-81%

Potential reduce by 218.5 kB

  • Original 269.0 kB
  • After minification 251.1 kB
  • After compression 50.5 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.de needs all CSS files to be minified and compressed as it can save up to 218.5 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 25 (61%)

Requests Now

41

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 41 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 7 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.booklooker.de

www.booklooker.de

332 ms

booklooker.gen__1602261327.css

booklooker.gen__1602261327.css

186 ms

jquery-ui.css

jquery-ui.css

79 ms

jquery.cluetip__1602261327.css

jquery.cluetip__1602261327.css

179 ms

shariff__1602261327.css

shariff__1602261327.css

181 ms

7765.jpg

7765.jpg

636 ms

jquery.min.js

jquery.min.js

102 ms

jquery-ui.min.js

jquery-ui.min.js

145 ms

jquery-ui-i18n.min.js

jquery-ui-i18n.min.js

120 ms

jquery.hoverIntent__1602261327.js

jquery.hoverIntent__1602261327.js

186 ms

jquery.cluetip__1602261327.js

jquery.cluetip__1602261327.js

266 ms

jquery.ui.autocomplete.html__1602261327.js

jquery.ui.autocomplete.html__1602261327.js

198 ms

main__1602261327.js

main__1602261327.js

350 ms

einkaufswagen_mobile.png

einkaufswagen_mobile.png

260 ms

bewertungen.png

bewertungen.png

261 ms

eng.png

eng.png

262 ms

einkaufswagen.gif

einkaufswagen.gif

333 ms

dummy.gif

dummy.gif

376 ms

3175.jpg

3175.jpg

635 ms

5016.jpg

5016.jpg

640 ms

2274.jpg

2274.jpg

646 ms

9874.jpg

9874.jpg

654 ms

1055.jpg

1055.jpg

662 ms

9394.jpg

9394.jpg

719 ms

7279.jpg

7279.jpg

727 ms

1175.jpg

1175.jpg

732 ms

7480.jpg

7480.jpg

758 ms

css

css

83 ms

css

css

97 ms

logo_booklooker_web_color.png

logo_booklooker_web_color.png

97 ms

leftFoot.gif

leftFoot.gif

96 ms

arrow2.gif

arrow2.gif

97 ms

vorteil.png

vorteil.png

97 ms

icon_0.png

icon_0.png

140 ms

icon_3.png

icon_3.png

140 ms

icon_1.png

icon_1.png

188 ms

icon_2.png

icon_2.png

180 ms

icon_4.png

icon_4.png

182 ms

arrow.gif

arrow.gif

181 ms

gebrauchte-buecher-kaufen_07.jpg

gebrauchte-buecher-kaufen_07.jpg

229 ms

punktlinie_klein.gif

punktlinie_klein.gif

228 ms

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

51 ms

DXI1ORHCpsQm3Vp6mXoaTYnF5uFdDttMLvmWuJdhhgs.ttf

DXI1ORHCpsQm3Vp6mXoaTYnF5uFdDttMLvmWuJdhhgs.ttf

58 ms

MTP_ySUJH_bn48VBG8sNSonF5uFdDttMLvmWuJdhhgs.ttf

MTP_ySUJH_bn48VBG8sNSonF5uFdDttMLvmWuJdhhgs.ttf

65 ms

k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf

k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf

66 ms

EInbV5DfGHOiMmvb1Xr-honF5uFdDttMLvmWuJdhhgs.ttf

EInbV5DfGHOiMmvb1Xr-honF5uFdDttMLvmWuJdhhgs.ttf

69 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

43 ms

ui-bg_flat_75_ffffff_40x100.png

ui-bg_flat_75_ffffff_40x100.png

26 ms

Accessibility Review

booklooker.de accessibility score

94

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

Best Practices

booklooker.de best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

booklooker.de SEO score

87

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 uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    DE

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Booklooker.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Booklooker.de main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

booklooker.de

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: