Report Summary

  • 75

    Performance

    Renders faster than
    83% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 78

    SEO

    Google-friendlier than
    39% of websites

betaboeken.nl

Bèta Boeken Antiquariaat - Scientific antiquarian books.

Page Load Speed

1.7 sec in total

First Response

277 ms

Resources Loaded

1.3 sec

Page Rendered

204 ms

betaboeken.nl screenshot

About Website

Welcome to betaboeken.nl homepage info - get ready to check Beta Boeken best content right away, or after learning these important things about betaboeken.nl

Bèta Boeken \ Beta Books- The international Antiquarian Booksite. Search and find used, rare and second-hand books on the exact sciences.

Visit betaboeken.nl

Key Findings

We analyzed Betaboeken.nl page load time and found that the first response time was 277 ms and then it took 1.5 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

betaboeken.nl performance score

75

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

33/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

38/100

25%

SI (Speed Index)

Value4.0 s

81/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.016

100/100

15%

TTI (Time to Interactive)

Value3.8 s

89/100

10%

Network Requests Diagram

betaboeken.nl

277 ms

jquery-1.10.2.min.js

374 ms

lightbox-2.6.min.js

173 ms

reset.css

182 ms

mobilenav.css

198 ms

Our browser made a total of 21 requests to load all elements on the main page. We found that 81% of them (17 requests) were addressed to the original Betaboeken.nl, 10% (2 requests) were made to Fonts.googleapis.com and 10% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (544 ms) belongs to the original domain Betaboeken.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 85.1 kB (21%)

Content Size

401.0 kB

After Optimization

315.9 kB

In fact, the total size of Betaboeken.nl main page is 401.0 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. Only 10% of websites need less resources to load. Images take 276.7 kB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 4.5 kB

  • Original 6.8 kB
  • After minification 6.4 kB
  • After compression 2.3 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 4.5 kB or 66% of the original size.

Image Optimization

-1%

Potential reduce by 1.5 kB

  • Original 276.7 kB
  • After minification 275.2 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. Beta Boeken images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 65.4 kB

  • Original 100.5 kB
  • After minification 100.5 kB
  • After compression 35.1 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 65.4 kB or 65% of the original size.

CSS Optimization

-81%

Potential reduce by 13.8 kB

  • Original 17.1 kB
  • After minification 10.8 kB
  • After compression 3.3 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. Betaboeken.nl needs all CSS files to be minified and compressed as it can save up to 13.8 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (33%)

Requests Now

18

After Optimization

12

The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Beta Boeken. 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 CSS and as a result speed up the page load time.

Accessibility Review

betaboeken.nl accessibility score

89

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

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

betaboeken.nl 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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

betaboeken.nl SEO score

78

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

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

    EN

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

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

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