3 sec in total
268 ms
2.5 sec
169 ms
Visit stem.org.uk now to see the best up-to-date Stem content for United Kingdom and also check out these interesting facts you probably never knew about stem.org.uk
Visit stem.org.ukWe analyzed Stem.org.uk page load time and found that the first response time was 268 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
stem.org.uk performance score
name
value
score
weighting
Value5.5 s
6/100
10%
Value13.7 s
0/100
25%
Value8.9 s
15/100
10%
Value2,680 ms
4/100
30%
Value0.966
2/100
15%
Value12.1 s
16/100
10%
268 ms
473 ms
110 ms
219 ms
263 ms
Our browser made a total of 34 requests to load all elements on the main page. We found that 94% of them (32 requests) were addressed to the original Stem.org.uk, 6% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (875 ms) belongs to the original domain Stem.org.uk.
Page size can be reduced by 448.9 kB (64%)
697.0 kB
248.2 kB
In fact, the total size of Stem.org.uk main page is 697.0 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. 30% of websites need less resources to load. Javascripts take 324.9 kB which makes up the majority of the site volume.
Potential reduce by 20.5 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 20.5 kB or 73% of the original size.
Potential reduce by 11.3 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, Stem needs image optimization as it can save up to 11.3 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 223.7 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 223.7 kB or 69% of the original size.
Potential reduce by 193.4 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.org.uk needs all CSS files to be minified and compressed as it can save up to 193.4 kB or 79% of the original size.
Number of requests can be reduced by 11 (38%)
29
18
The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Stem. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
stem.org.uk
268 ms
www.stem.org.uk
473 ms
css_kShW4RPmRstZ3SpIC-ZvVGNFVAi0WEMuCnI0ZkYIaFw.css
110 ms
css_pJ4e_CLkI9bIX5F4ok4auzNtUfM5qcTiqtlX1yVw4H0.css
219 ms
css_atkFGFlvG6sSQcIj6Q73rpgsXhtr58AwITc2aQjVotk.css
263 ms
css_9q-TRB8xn1eTk79mtomGrFGcpdZ4bbhXvPP_hc2Lspg.css
293 ms
css_Vb00Pr9vSIM-lATcQ8LDte3exOF0sEksIdamFX2WZFk.css
875 ms
js_MpKfe1sTh5JIVGCZ17DsAuT1rqAC38MLLlkjqjQ1X_k.js
728 ms
js_fnFMT3X1_bhCDaBABvWwi8Yq5Useb8r_XorbufldYMA.js
489 ms
js_COMsmDyrY9mzVU28X2uGvF4Ba3vd5eTo5xEO7dvCUZM.js
415 ms
js_I8yX6RYPZb7AtMcDUA3QKDZqVkvEn35ED11_1i7vVpc.js
444 ms
js_mMgVje4wrRCQqpuTqbZhPrB6dV_I2l7NcfuZ-x1mdjY.js
713 ms
modernizr.min.js
492 ms
js_fDpJXi8hM7P1ozpwHUovUkgb-mkIIgFYS7yzYS6p6zY.js
779 ms
analytics.js
176 ms
logo-stem-new.svg
283 ms
Computing%20Conference%20with%20CAS%20Regional%20Centre%20for%20Yorkshire%20and%20Humber.jpg
254 ms
British%20Science%20Week%20%281%29.jpg
356 ms
Using%20games%20to%20teach%20mathematics.jpg
340 ms
In%20at%20the%20deep%20end%20%E2%80%93%20non-specialists%20teaching%20computer%20science.jpg
385 ms
Core%20Maths%20Support%20Programme.jpg
452 ms
Demo%20insights.jpg
402 ms
WEB-ICONS_325px-wide-resour.gif
438 ms
WEB-ICONS_325px-wide-CPD.gif
471 ms
WEB-ICONS_325px-wide-magazi.gif
511 ms
WEB-ICONS_325px-wide-bursar.gif
544 ms
WEB-ICONS_325px-wide-workin.gif
583 ms
WEB-ICONS_325px-wide-yourda_0.gif
621 ms
logo-stem-new-white.svg
623 ms
logo-enthuse-white.svg
617 ms
Bliss2Rg.woff
620 ms
Bliss2Bd.woff
632 ms
Bliss2Lt.woff
669 ms
collect
11 ms
stem.org.uk accessibility score
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
[id] attributes on active, focusable elements are not unique
Heading elements are not in a sequentially-descending order
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 IDs are not unique
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
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.org.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
General
Impact
Issue
Detected JavaScript libraries
stem.org.uk SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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
N/A
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Stem.org.uk can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Stem.org.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.org.uk
Open Graph description is not detected on the main page of Stem. 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: