11.1 sec in total
162 ms
10.6 sec
331 ms
Click here to check amazing ZVAB content for Germany. Otherwise, check out these important facts you probably never knew about zvab.com
Das ZVAB - Zentrales Verzeichnis Antiquarischer Bücher - ist seit 1996 das Online-Antiquariat für deutschsprachige Titel. Tausende von professionellen Antiquaren bieten auf ZVAB.com Millionen antiquar...
Visit zvab.comWe analyzed Zvab.com page load time and found that the first response time was 162 ms and then it took 11 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
zvab.com performance score
name
value
score
weighting
Value3.2 s
43/100
10%
Value5.0 s
26/100
25%
Value3.3 s
90/100
10%
Value240 ms
85/100
30%
Value0.004
100/100
15%
Value5.3 s
73/100
10%
162 ms
188 ms
160 ms
167 ms
459 ms
Our browser made a total of 60 requests to load all elements on the main page. We found that 92% of them (55 requests) were addressed to the original Zvab.com, 3% (2 requests) were made to Googleadservices.com and 2% (1 request) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Zvab.com.
Page size can be reduced by 581.4 kB (23%)
2.5 MB
1.9 MB
In fact, the total size of Zvab.com main page is 2.5 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. 25% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.
Potential reduce by 54.5 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. This page needs HTML code to be minified as it can gain 16.5 kB, which is 26% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 54.5 kB or 85% of the original size.
Potential reduce by 27.8 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. ZVAB images are well optimized though.
Potential reduce by 262.4 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 262.4 kB or 69% of the original size.
Potential reduce by 236.7 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. Zvab.com needs all CSS files to be minified and compressed as it can save up to 236.7 kB or 82% of the original size.
Number of requests can be reduced by 20 (36%)
56
36
The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ZVAB. 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 from 4 to 1 for CSS and as a result speed up the page load time.
zvab.com
162 ms
www.zvab.com
188 ms
pageload.js
160 ms
responsive.js
167 ms
zvab.css
459 ms
zvab-gateway.css
322 ms
sn.css
161 ms
sntemplate.css
162 ms
eluminate_zvab.js
475 ms
techprops.js
314 ms
cmdatatagutils.inc
319 ms
abe.js
699 ms
conversion.js
21 ms
mustache.min.js
500 ms
slick.min.js
728 ms
homepage.js
522 ms
sn.min2.js
612 ms
sntemplate2.js
621 ms
avatar-unterwegs.png
163 ms
loewenzahn.png
330 ms
zvab-martina.png
330 ms
kueken.jpg
477 ms
zvab-kristina.png
329 ms
ostern-kinderbuch.jpg
544 ms
zvab-valerie.png
409 ms
hasenkanone.jpg
646 ms
zvab-fabian.png
489 ms
ostern.jpg
640 ms
zvab-udo.png
569 ms
kuekentennis.jpg
783 ms
zvab-larissa.png
647 ms
simplicissimus.jpg
851 ms
scherenschnitt.jpg
876 ms
zvab-jennifer.png
802 ms
fixfoxi.jpg
969 ms
zvab-robert.png
804 ms
termine.jpg
941 ms
footer-logo-zvab.gif
959 ms
zvab-logo.gif
935 ms
abe-sprite.png
984 ms
unterwegs-berlin-3.jpg
1777 ms
umberto-eco.png
1301 ms
circle-right.svg
1089 ms
archiv.png
1396 ms
harper-lee.png
1253 ms
story-osterpostkarten.jpg
1294 ms
feature-tile-berlindale2.jpg
1402 ms
slash-tile-bg.png
1577 ms
xylothek-story-tile.jpg
1582 ms
icon-twitter.png
1438 ms
icon-facebook.png
1447 ms
at.png
1600 ms
81 ms
arrow-left.png
1330 ms
arrow-right.png
1422 ms
loading.gif
1439 ms
54 ms
44 ms
cm
44 ms
timer.gif
157 ms
zvab.com accessibility score
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
[aria-hidden="true"] elements contain focusable descendents
[aria-*] attributes are not valid or misspelled
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
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
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
zvab.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
zvab.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
robots.txt is not valid
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
Document uses legible font sizes
Tap targets are not sized appropriately
DE
DE
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zvab.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 Zvab.com 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.
zvab.com
Open Graph description is not detected on the main page of ZVAB. 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: