2 sec in total
163 ms
1.6 sec
229 ms
Visit zis.ch now to see the best up-to-date ZIS content for Switzerland and also check out these interesting facts you probably never knew about zis.ch
Zurich International School (ZIS) is a leading international school in Switzerland, offering an international education in English for children aged 3 to 18 years as well as an English/German Bilingua...
Visit zis.chWe analyzed Zis.ch page load time and found that the first response time was 163 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.
zis.ch performance score
name
value
score
weighting
Value4.3 s
17/100
10%
Value19.8 s
0/100
25%
Value15.7 s
0/100
10%
Value4,060 ms
1/100
30%
Value0.199
62/100
15%
Value17.8 s
4/100
10%
163 ms
352 ms
67 ms
31 ms
27 ms
Our browser made a total of 150 requests to load all elements on the main page. We found that 44% of them (66 requests) were addressed to the original Zis.ch, 21% (32 requests) were made to Pbs.twimg.com and 12% (18 requests) were made to Newjs.finalsite.com. The less responsive or slowest element that took the longest time to load (514 ms) relates to the external source Pbs.twimg.com.
Page size can be reduced by 1.6 MB (22%)
7.2 MB
5.6 MB
In fact, the total size of Zis.ch main page is 7.2 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 5.2 MB which makes up the majority of the site volume.
Potential reduce by 53.9 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. 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 53.9 kB or 79% of the original size.
Potential reduce by 143.0 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. ZIS images are well optimized though.
Potential reduce by 1.2 MB
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 1.2 MB or 69% of the original size.
Potential reduce by 184.6 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. Zis.ch needs all CSS files to be minified and compressed as it can save up to 184.6 kB or 83% of the original size.
Number of requests can be reduced by 69 (47%)
148
79
The browser has sent 148 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ZIS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 36 to 1 for JavaScripts and from 28 to 1 for CSS and as a result speed up the page load time.
zis.ch
163 ms
www.zis.ch
352 ms
styles.cfm
67 ms
ss.css
31 ms
jquery.min.js
27 ms
fs_global.js
26 ms
main.css
27 ms
jquery.ui.1.8rc3.css
26 ms
jquery.jgrowl.css
17 ms
elements.css
27 ms
displaybanner.css.cfm
83 ms
structure.css
25 ms
jplayer.finalsite.css
26 ms
galleria.finalsite.css
23 ms
player_html.css
25 ms
main.css
69 ms
custom.css
68 ms
fsSlider.min.js
69 ms
fsGlide.js
70 ms
fsButtons.min.js
72 ms
global_vars.js
80 ms
aki7czm.js
135 ms
jquery.ui.min.js
19 ms
jquery.jgrowl_minimized.js
12 ms
utilities.js
17 ms
spch.js
58 ms
tiny_mce.js
169 ms
jquery.tinymce.js
63 ms
json2.js
13 ms
swfobject.js
36 ms
jquery.jplayer.min.js
36 ms
jplayer.playlist.js
36 ms
galleria-1.2.8.min.js
37 ms
player_html.js
36 ms
portals.min.js
35 ms
elements.min.js
37 ms
jquery.cookie.js
37 ms
flash_headers.js
29 ms
ga.js
20 ms
__utm.gif
11 ms
arrow_refresh.png
93 ms
embed.cfm
164 ms
widgets.js
83 ms
poweredBy.svg
83 ms
search.png
111 ms
btn-bg-contact.png
115 ms
logo-top.png
116 ms
slogan-gradient.png
114 ms
logo-footer.png
112 ms
ibo.png
119 ms
cis_new_sm.jpg
118 ms
neasc_web.gif
116 ms
aboutus_2015.jpg
129 ms
admissions_2015.jpg
124 ms
learning_2015.jpg
151 ms
drop_student_life_2015.jpg
189 ms
campus_2015.jpg
155 ms
community_2015.jpg
150 ms
alumni_2015.jpg
156 ms
glide-social.png
156 ms
bg-social.png
189 ms
bg-contact.png
188 ms
ui-bg_flat_75_ffffff_40x100.png
80 ms
elementremote.cfc
441 ms
elementremote.cfc
443 ms
timeline.d11f7a3b3287fb94220e8ee6d03cc772.js
28 ms
ui-icons_222222_256x240.png
22 ms
jquery.min.js
97 ms
jquery.ui.min.js
85 ms
fs_global.js
115 ms
swfobject.js
109 ms
ui.all.css
94 ms
jquery.cookie.js
107 ms
syndication
106 ms
331771815875723265
197 ms
ui.base.css
34 ms
ui.theme.css
45 ms
ui.core.css
40 ms
ui.resizable.css
33 ms
ui.accordion.css
37 ms
ui.dialog.css
35 ms
ui.slider.css
85 ms
ui.tabs.css
84 ms
ui.datepicker.css
87 ms
ui.progressbar.css
83 ms
proxy.jpg
64 ms
2lgX_Jgh0vDGZn2R.jpg
274 ms
timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css
36 ms
play_icon_sm.png
49 ms
jplayer.blue.monday.jpg
46 ms
bg.png
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bar.png
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icon_sprite.png
45 ms
timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css
44 ms
addthis_widget.js
30 ms
ui-bg_glass_75_ffffff_1x400.png
89 ms
ui-icons_222222_256x240.png
91 ms
NhxbbtAo_normal.jpg
219 ms
R4G1hgPs_normal.jpeg
222 ms
headsteves_normal.jpg
219 ms
OdiLllHU_normal.jpg
220 ms
10dbcb0af804dd59fcd9991be15aeb9e_normal.jpeg
217 ms
Zis_initials_rgb_normal.jpg
219 ms
Photo_7_normal.jpg
254 ms
bkVQsuqr_normal.jpg
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ZwW9Jdeg_normal.jpg
256 ms
7e5b2cc0751e99c15ff5d364140bdd8e_normal.png
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SaJaSMW2_normal.jpg
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Er4qr1zg_normal.jpeg
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WrnrUByS_normal.jpg
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Cd5U8s3WoAEN-GA.jpg
291 ms
CYw6HRsWsAAcGfk.jpg
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CYm7DDqWcAAOkvT.jpg
308 ms
CYnAmM_WYAAWTNf.jpg
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CVD-HfqW4AAHJnw.jpg
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CVDC-fOU4AAtTjU.jpg
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CU1058eVAAAL3uA.jpg
337 ms
CUp5dH2UcAA0S-z.jpg
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CUFHKy2WwAA4N73.jpg
358 ms
CT83dhlW4AAc5DL.jpg
383 ms
CTyCGpTWIAAjQAi.png
514 ms
CTsUrsJWIAAciZZ.jpg
453 ms
CTnZ4G5XAAgEoLN.jpg:small
413 ms
CTnZ4G6XIAIPO8_.jpg:small
452 ms
CTngaxdUsAAcysj.jpg:small
456 ms
CTngaxdVEAEkLt7.jpg:small
467 ms
CTngaxbUkAEV_xf.jpg:small
471 ms
CTnga0PVEAENxf2.jpg:small
482 ms
syndication_bundle_v1_64fcb3dd2f6da5b5f976d91a319ef73e329c1a5d.css
106 ms
syndication_bundle_v1_64fcb3dd2f6da5b5f976d91a319ef73e329c1a5d.css
141 ms
300lo.json
82 ms
nr-885.min.js
66 ms
page.cfm
120 ms
grid.gif
18 ms
sh.8e5f85691f9aaa082472a194.html
39 ms
17f1641df3
101 ms
proxy.jpg
55 ms
homeage34.jpg
146 ms
homepage31.jpg
144 ms
homepage36.jpg
122 ms
homepage37.jpg
117 ms
homepage38.jpg
150 ms
homepage30.jpg
94 ms
homepage27.jpg
247 ms
homepage29.jpg
247 ms
homepage33.jpg
280 ms
homepage25.jpg
288 ms
homepage32.jpg
268 ms
homepage35.jpg
304 ms
jot.html
2 ms
zis.ch 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
Buttons do not have an accessible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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>).
List items (<li>) are not contained within <ul> or <ol> parent elements.
zis.ch 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
zis.ch 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
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
EN
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zis.ch 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 Zis.ch 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.
zis.ch
Open Graph description is not detected on the main page of ZIS. 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: