4.6 sec in total
313 ms
3.8 sec
495 ms
Welcome to zert-bau.de homepage info - get ready to check Zert Bau best content for Germany right away, or after learning these important things about zert-bau.de
Die Zertifizierung Bau ist die führende bundesweit tätige Zertifizierungsstelle für die Baubranche. Unsere Zertifikate schaffen Vertrauen.
Visit zert-bau.deWe analyzed Zert-bau.de page load time and found that the first response time was 313 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
zert-bau.de performance score
name
value
score
weighting
Value6.1 s
3/100
10%
Value8.2 s
2/100
25%
Value7.5 s
26/100
10%
Value490 ms
59/100
30%
Value0.007
100/100
15%
Value8.4 s
39/100
10%
313 ms
1347 ms
199 ms
203 ms
200 ms
Our browser made a total of 86 requests to load all elements on the main page. We found that 92% of them (79 requests) were addressed to the original Zert-bau.de, 2% (2 requests) were made to Releases.flowplayer.org and 2% (2 requests) were made to B2btracking.addvalue.de. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Zert-bau.de.
Page size can be reduced by 724.3 kB (56%)
1.3 MB
576.0 kB
In fact, the total size of Zert-bau.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. 25% of websites need less resources to load. Javascripts take 604.4 kB which makes up the majority of the site volume.
Potential reduce by 90.3 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. This page needs HTML code to be minified as it can gain 23.5 kB, which is 23% 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 90.3 kB or 88% of the original size.
Potential reduce by 29.7 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. Zert Bau images are well optimized though.
Potential reduce by 473.2 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 473.2 kB or 78% of the original size.
Potential reduce by 131.1 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. Zert-bau.de needs all CSS files to be minified and compressed as it can save up to 131.1 kB or 78% of the original size.
Number of requests can be reduced by 43 (51%)
84
41
The browser has sent 84 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zert Bau. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 22 to 1 for CSS and as a result speed up the page load time.
zert-bau.de
313 ms
www.zert-bau.de
1347 ms
news-basic.css
199 ms
stylesheet_13699a10d4.css
203 ms
jquery.ui.theme.css
200 ms
jquery.ui.datepicker.css
203 ms
jquery.sidr.dark.css
204 ms
main.css
206 ms
audits.css
299 ms
jquery.fancybox-1.3.4.css
301 ms
main2.css
309 ms
style.css
302 ms
owl.carousel.css
307 ms
owl.theme.css
312 ms
indexed_search.css
404 ms
news.css
402 ms
powermail.css
404 ms
stylesheet_240b4ca893.css
407 ms
jquery-1.8.x-1.10.x-1.2.x.js
744 ms
jquery.fancybox-1.3.4.js
413 ms
jquery.sidr.min.js
500 ms
jquery.touchwipe.min.js
500 ms
custom.js
504 ms
owl.carousel.min.js
512 ms
flowplayer.min.js
9 ms
minimalist.css
9 ms
jsbn.js
517 ms
prng4.js
599 ms
rng.js
599 ms
rsa.js
607 ms
base64.js
612 ms
rsaauth_min.js
617 ms
jquery.ui.datepicker.min.js
620 ms
jquery.validationEngine-en.js
614 ms
jquery.validationEngine.js
633 ms
tabs.js
634 ms
form.js
634 ms
powermail_frontend.js
740 ms
ce.js
739 ms
zert-bau-logo.jpg
141 ms
phone-icon.gif
139 ms
add-icon.gif
111 ms
login.png
112 ms
unternehmenssuche3.png
110 ms
logo_mobil.jpg
140 ms
anrufen_mobil.jpg
204 ms
mail_mobil.jpg
214 ms
suchen_mobil.jpg
209 ms
menu-bg.gif
214 ms
search_field.gif
220 ms
lupe-icon.gif
223 ms
slider-1-1920.jpg
721 ms
owl_prev.png
311 ms
schrift-slider.png
435 ms
RTEmagicC_unsere_leistungen.png
327 ms
RTEmagicC_btn_alle_anzeigen.png
329 ms
csm_Pflastertage_a932177ea6.jpg
438 ms
csm_1__Medium__749b6b1a6c.jpg
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csm_bautec_Frau_Hendricks__2__947e856daa.jpg
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owl_next.png
447 ms
alle_anzeigen_pfeil.png
525 ms
info-icon.gif
536 ms
cal-icon-small.png
537 ms
termine_blau_button.png
549 ms
termine_datum_grau.png
624 ms
termine_ort_grau.png
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karte.png
645 ms
stadt_icon.png
647 ms
csm_mitglieder_03_b1918a08d3.jpg
652 ms
csm_mitglieder_19_a3c76b963e.jpg
730 ms
baugewebeverband-niedersachsen.jpg
750 ms
footer-bg.jpg
857 ms
trs.js
380 ms
ga.js
79 ms
stadt_act_icon.png
665 ms
ap_person.png
667 ms
ap_telefon.png
716 ms
ap_webseite.png
729 ms
2800.js
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__utm.gif
13 ms
trs.gif
228 ms
responsive1024.css
104 ms
responsive768.css
104 ms
responsive480.css
104 ms
responsive360.css
105 ms
responsive320.css
105 ms
zert-bau.de accessibility score
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
Image elements do not have [alt] attributes
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.
zert-bau.de best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
zert-bau.de SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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
DE
DE
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zert-bau.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 Zert-bau.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.
zert-bau.de
Open Graph description is not detected on the main page of Zert Bau. 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: