1.5 sec in total
164 ms
1.2 sec
148 ms
Click here to check amazing Zefon content for United States. Otherwise, check out these important facts you probably never knew about zefon.com
Zefon International is an industry leader for air sampling equipment. Superior quality air sampling pumps, cassettes and more for sale. Visit our site today.
Visit zefon.comWe analyzed Zefon.com page load time and found that the first response time was 164 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.
zefon.com performance score
name
value
score
weighting
Value3.6 s
32/100
10%
Value3.6 s
61/100
25%
Value8.7 s
17/100
10%
Value720 ms
41/100
30%
Value0.16
73/100
15%
Value14.9 s
8/100
10%
164 ms
398 ms
54 ms
61 ms
89 ms
Our browser made a total of 35 requests to load all elements on the main page. We found that 89% of them (31 requests) were addressed to the original Zefon.com, 6% (2 requests) were made to Smarticon.geotrust.com and 6% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (513 ms) belongs to the original domain Zefon.com.
Page size can be reduced by 82.9 kB (54%)
154.0 kB
71.1 kB
In fact, the total size of Zefon.com main page is 154.0 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. 15% of websites need less resources to load. Images take 50.0 kB which makes up the majority of the site volume.
Potential reduce by 37.8 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 37.8 kB or 85% of the original size.
Potential reduce by 11.2 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. Obviously, Zefon needs image optimization as it can save up to 11.2 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 9.3 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 9.3 kB or 31% of the original size.
Potential reduce by 24.5 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. Zefon.com needs all CSS files to be minified and compressed as it can save up to 24.5 kB or 83% of the original size.
Number of requests can be reduced by 18 (55%)
33
15
The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zefon. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.
zefon.com
164 ms
www.zefon.com
398 ms
common.js
54 ms
browser_identificator.js
61 ms
skin1.css
89 ms
v4menu.css
61 ms
capitalise2.js
62 ms
si.js
50 ms
ga.js
24 ms
smarticon
44 ms
zmainheader760x150current.gif
87 ms
spacer.gif
37 ms
go.gif
39 ms
dialog_grey_bg.gif
37 ms
dingbats_categorie.gif
38 ms
sub.gif
59 ms
transparent.gif
59 ms
dingbats_orders.gif
60 ms
cart_empty.gif
63 ms
dingbats_authentification.gif
87 ms
but_menu1.gif
89 ms
but_menubg.gif
89 ms
but_menu2.gif
92 ms
facebook.jpg
115 ms
twitter.png
115 ms
dingbats_help.gif
117 ms
DrZanimation.gif
259 ms
elf-banner7.gif
513 ms
t_1_01-01.jpg
135 ms
t_930.jpg
143 ms
charcoal-tubes.jpg
173 ms
Gemini-sorbent-tube-thumb.jpg
202 ms
Model804-thumb.jpg
164 ms
EscortELF-Pump-Thumb.jpg
172 ms
__utm.gif
11 ms
zefon.com accessibility score
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
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
zefon.com 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
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
zefon.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
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
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zefon.com 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 Zefon.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.
zefon.com
Open Graph description is not detected on the main page of Zefon. 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: