2.3 sec in total
162 ms
1.8 sec
343 ms
Welcome to zoll.com homepage info - get ready to check ZOLL best content for United States right away, or after learning these important things about zoll.com
For over 25 years, ZOLL has been a leader in developing medical devices and software solutions that advance emergency care and help save lives. Learn more about our resuscitation and critical care sol...
Visit zoll.comWe analyzed Zoll.com page load time and found that the first response time was 162 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.
zoll.com performance score
name
value
score
weighting
Value4.0 s
23/100
10%
Value55.8 s
0/100
25%
Value7.8 s
24/100
10%
Value2,100 ms
7/100
30%
Value0.302
39/100
15%
Value10.4 s
24/100
10%
162 ms
639 ms
210 ms
59 ms
23 ms
Our browser made a total of 30 requests to load all elements on the main page. We found that 53% of them (16 requests) were addressed to the original Zoll.com, 20% (6 requests) were made to Use.typekit.net and 7% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (639 ms) belongs to the original domain Zoll.com.
Page size can be reduced by 459.4 kB (19%)
2.4 MB
1.9 MB
In fact, the total size of Zoll.com main page is 2.4 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. 40% of websites need less resources to load. Images take 1.9 MB which makes up the majority of the site volume.
Potential reduce by 69.7 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 14.3 kB, which is 17% 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 69.7 kB or 81% of the original size.
Potential reduce by 93.5 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. ZOLL images are well optimized though.
Potential reduce by 245.4 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 245.4 kB or 68% of the original size.
Potential reduce by 50.9 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. Zoll.com needs all CSS files to be minified and compressed as it can save up to 50.9 kB or 82% of the original size.
Number of requests can be reduced by 6 (29%)
21
15
The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ZOLL. 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 from 4 to 1 for CSS and as a result speed up the page load time.
zoll.com
162 ms
Default.aspx
639 ms
ektron.stylesheet.ashx
210 ms
ieo0hrw.js
59 ms
css
23 ms
main.css
361 ms
built.js
498 ms
www.zoll.com
134 ms
analytics.js
72 ms
210798.js
230 ms
zoll-logo-blue.png
120 ms
home_hero_1.jpg
281 ms
Home-ResQCPR-hero.png
215 ms
home_hero_3.jpg
120 ms
zoll-logo-white.png
161 ms
cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf
115 ms
k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf
115 ms
TuZhyeF2NRjNYCQJaiV0NkAV6oVkJD5WbJq2tbNSZUXff5WcggMdeMJ6Mk6g5Msfb2iRZeFKF2sKZQsyFhsK526aFhZcjQmRw2M3FhJtZebtFRmKwh4KjDwtwD6DwAZ8wcmywQSaZRjkwR9ajQqU5QI.woff
116 ms
ORBFyy_J1l7O3Yt8nro3iNNJnEqg_p245jp2QpEVEe9ff4egggMdeMJ6Mk6g5Mifb2iRZeFKF2sKZQsyFhsK526aFhZcjQmRw2M3FhJtZebtFRmKwh4KjDwtwD6DwAZ8wcmywQSaZRjkwR9ajQqU5QI.woff
159 ms
icomoon.woff
184 ms
-lWOUNVuqLrprlZQgQmfBS-6-0XeW8qHuXi2jgaN2Zvff4AgggMdeMJ6Mk6g5Mofb2iRZeFKF2sKZQsyFhsK526aFhZcjQmRw2M3FhJtZebtFRmKwh4KjDwtwD6DwAZ8wcmywQSaZRjkwR9ajQqU5QI.woff
185 ms
68wfs3FvgVXTEIgNIfcL2oP-joNfA6vsay4LRIS2Ix6ff4HgggMdeMJ6Mk6g5gBfb2iRZeFKF2sKZQsyFhsK526aFhZcjQmRw2M3FhJtZebtFRmKwh4KjDwtwD6DwAZ8wcmywQSaZRjkwR9ajQqU5QI.woff
220 ms
collect
93 ms
Hosp_Home_page_ad_L1.jpg
255 ms
Home_page_ad_PS_l.jpg
296 ms
Data_1920_667.jpg
500 ms
LifeVest_Home_Page_ad_l.jpg
595 ms
icons-s4cb77e47a1.png
167 ms
p.gif
132 ms
__ptq.gif
10 ms
zoll.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-*] attributes do not match their roles
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
zoll.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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
Issues were logged in the Issues panel in Chrome Devtools
zoll.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
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zoll.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Zoll.com 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.
zoll.com
Open Graph description is not detected on the main page of ZOLL. 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: