2.8 sec in total
332 ms
2.3 sec
168 ms
Click here to check amazing ZEISS content for South Africa. Otherwise, check out these important facts you probably never knew about zeiss.co.za
ZEISS is an internationally leading technology enterprise with solutions for industry, research, medicine, eyeglass lenses, camera lenses, binoculars and planetariums.
Visit zeiss.co.zaWe analyzed Zeiss.co.za page load time and found that the first response time was 332 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.
zeiss.co.za performance score
name
value
score
weighting
Value3.2 s
44/100
10%
Value4.1 s
47/100
25%
Value15.5 s
0/100
10%
Value19,760 ms
0/100
30%
Value0.001
100/100
15%
Value27.2 s
0/100
10%
332 ms
493 ms
196 ms
283 ms
272 ms
Our browser made a total of 34 requests to load all elements on the main page. We found that 88% of them (30 requests) were addressed to the original Zeiss.co.za, 9% (3 requests) were made to Google-analytics.com and 3% (1 request) were made to Assets.adobedtm.com. The less responsive or slowest element that took the longest time to load (773 ms) belongs to the original domain Zeiss.co.za.
Page size can be reduced by 688.2 kB (61%)
1.1 MB
443.1 kB
In fact, the total size of Zeiss.co.za main page is 1.1 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. 30% of websites need less resources to load. Javascripts take 674.9 kB which makes up the majority of the site volume.
Potential reduce by 35.9 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 7.7 kB, which is 18% 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 35.9 kB or 83% of the original size.
Potential reduce by 20.0 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. ZEISS images are well optimized though.
Potential reduce by 467.8 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 467.8 kB or 69% of the original size.
Potential reduce by 164.6 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. Zeiss.co.za needs all CSS files to be minified and compressed as it can save up to 164.6 kB or 82% of the original size.
Number of requests can be reduced by 9 (32%)
28
19
The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ZEISS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.
zeiss.co.za
332 ms
www.zeiss.co.za
493 ms
home.html
196 ms
zeiss-corporate.css
283 ms
zeiss-corporate.css2.css
272 ms
zeiss-corporate.domino.css
294 ms
zeiss-corporate.js
773 ms
zeiss-corporate.js2.js
383 ms
satelliteLib-6c587e49b31d4f59883905c2bab3b0ee1a03ebb2.js
80 ms
analytics.js
38 ms
zeiss.logo.png
103 ms
language-switch-sprite.png
100 ms
icon.lupe.png
107 ms
menu_backbutton.png
105 ms
batis_objective.jpg
107 ms
future-moment.jpg
197 ms
historical-figures-zeiss.jpg
276 ms
batis_objective.jpg
195 ms
South-Africa_Home.jpg
293 ms
art_calendar_exhibition.jpg
200 ms
icon.facebook.png
197 ms
icon.twitter.png
291 ms
icon.gplus.png
295 ms
linklist_internal_link.gif
281 ms
nav.footer.png
283 ms
0bff5a93-ce9b-4468-9a94-431fb03301d0.woff
448 ms
f90b67e0-ac70-41c5-9f16-d837fa32d424.woff
469 ms
collect
51 ms
collect
44 ms
link_black.gif
342 ms
5beb2de5-f02e-4d93-95f9-8dae06b289d8.woff
435 ms
stage.level.indicator.png
301 ms
white-opacity-30.png
411 ms
back-to-top.png
410 ms
zeiss.co.za 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-*] attributes do not match their roles
ARIA input fields do not have accessible names
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Some elements have a [tabindex] value greater than 0
zeiss.co.za 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
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
zeiss.co.za SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zeiss.co.za 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 Zeiss.co.za 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.
zeiss.co.za
Open Graph description is not detected on the main page of ZEISS. 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: