2.8 sec in total
533 ms
1.9 sec
379 ms
Click here to check amazing Stem Open content for United Kingdom. Otherwise, check out these important facts you probably never knew about stem.open.ac.uk
Faculty of Science, Technology, Engineering and Mathematics at the Open University. We are world leaders in inclusive, innovative and impactful STEM teaching and research.
Visit stem.open.ac.ukWe analyzed Stem.open.ac.uk page load time and found that the first response time was 533 ms and then it took 2.3 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.
stem.open.ac.uk performance score
name
value
score
weighting
Value4.9 s
10/100
10%
Value4.9 s
28/100
25%
Value7.2 s
29/100
10%
Value570 ms
52/100
30%
Value0.065
97/100
15%
Value12.0 s
16/100
10%
533 ms
260 ms
261 ms
262 ms
268 ms
Our browser made a total of 57 requests to load all elements on the main page. We found that 58% of them (33 requests) were addressed to the original Stem.open.ac.uk, 19% (11 requests) were made to Platform.twitter.com and 5% (3 requests) were made to Syndication.twitter.com. The less responsive or slowest element that took the longest time to load (540 ms) belongs to the original domain Stem.open.ac.uk.
Page size can be reduced by 223.9 kB (28%)
812.1 kB
588.2 kB
In fact, the total size of Stem.open.ac.uk main page is 812.1 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. 60% of websites need less resources to load. Images take 540.6 kB which makes up the majority of the site volume.
Potential reduce by 34.6 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 7.4 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 34.6 kB or 79% of the original size.
Potential reduce by 54.7 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. Stem Open images are well optimized though.
Potential reduce by 54.9 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 54.9 kB or 48% of the original size.
Potential reduce by 79.6 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. Stem.open.ac.uk needs all CSS files to be minified and compressed as it can save up to 79.6 kB or 70% of the original size.
Number of requests can be reduced by 25 (45%)
55
30
The browser has sent 55 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Stem Open. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
stem.open.ac.uk
533 ms
css_rEI_5cK_B9hB4So2yZUtr5weuEV3heuAllCDE6XsIkI.css
260 ms
css_ClaZpEJWjkMSlAlGZSCuxLdmMR91FjW9qvCahZOEwYM.css
261 ms
css_7QV6kuKuClX0xHY1VYHyiN7pXj1h6CT5WlgJhQhqbaY.css
262 ms
css_ebn1aBIvi1mtLiafkB2gSP_2GVZ8A0SPPYG3afEU9Wk.css
268 ms
js_s5koNMBdK4BqfHyHNPWCXIL2zD0jFcPyejDZsryApj0.js
362 ms
js_V5g6xXD_BFA4P2tYlN34wTmbeXoCfvvUasR4CPITsN0.js
275 ms
221317523.js
58 ms
headerfooter.min.js
354 ms
headerfooter.css
432 ms
cassiecookiewidget.css
429 ms
widgets.js
109 ms
gtm.js
147 ms
loader.js
409 ms
sprite.png
123 ms
AS_RGB_Bronze-Award.png
123 ms
Athena-SWAN-Silver-Award.png
122 ms
iop-juno.jpg
122 ms
WISE_MEMBER_LOGO_strapline_300dpi.jpg
540 ms
creative-science.jpg
373 ms
Nick%2520Braithwaite_crop.jpg
209 ms
School%20Comp%20ThinkstockPhotos-476085510.jpg
210 ms
Engineering%20and%20Innovation%20ThinkstockPhotos-502918446.jpg
209 ms
ebv-earth-and-eco-2.jpg
218 ms
life-and-health-sciences.jpg
297 ms
mathematics-and-statistics.jpg
302 ms
physical-sciences.jpg
303 ms
kmi.jpg
309 ms
academic-square.jpg
386 ms
icon-prospectus.png
386 ms
stem.open.ac.uk
391 ms
widget_iframe.7dae38096d06923d683a2a807172322a.html
83 ms
England.svg
283 ms
icon-quote-white.svg
348 ms
icon-to-top.png
360 ms
fontawesome-webfont.woff
444 ms
settings
71 ms
horizon_timeline.a7991bb824d62c8d5038ddd875db8389.js
26 ms
embeds
29 ms
ou_stem
408 ms
headerfooter-print.css
87 ms
ou-royal-fca-statement.txt
111 ms
launch-3cf91248ece2.min.js
63 ms
polyfills-57d3feabe8bfd4ee389c.js
54 ms
runtime-eb61dff4a84b8f906e6b.js
70 ms
modules.c7def0268c66f6a548ed.js
136 ms
main-e9db78f5e7b3d83edd5e.js
133 ms
_app-446fb4a338b215deec8c.js
134 ms
%5BscreenName%5D-c8b4c96951cf24f547b4.js
135 ms
_buildManifest.js
133 ms
_ssgManifest.js
134 ms
id
60 ms
EX42d07fd4cfd24e2d8f6af4d1b69a6612-libraryCode_source.min.js
21 ms
siteanalyze_9956.js
113 ms
dest5.html
61 ms
id
59 ms
ibs:dpid=411&dpuuid=Yzq7fAAAAI9LawNP
9 ms
stem.open.ac.uk accessibility score
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.
stem.open.ac.uk 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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
stem.open.ac.uk 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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Stem.open.ac.uk 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 Stem.open.ac.uk 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.
stem.open.ac.uk
Open Graph description is not detected on the main page of Stem Open. 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: