5.7 sec in total
333 ms
5.2 sec
232 ms
Click here to check amazing Sei content. Otherwise, check out these important facts you probably never knew about sei.se
Stockholm Environment Institute (SEI) is an international non-profit research and policy organization for sustainability policy and practice.
Visit sei.seWe analyzed Sei.se page load time and found that the first response time was 333 ms and then it took 5.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
sei.se performance score
name
value
score
weighting
Value4.3 s
17/100
10%
Value10.9 s
0/100
25%
Value7.8 s
24/100
10%
Value1,370 ms
16/100
30%
Value0.054
98/100
15%
Value11.7 s
17/100
10%
333 ms
323 ms
1282 ms
64 ms
142 ms
Our browser made a total of 106 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Sei.se, 83% (88 requests) were made to Sei-international.org and 3% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.6 sec) relates to the external source Sei-international.org.
Page size can be reduced by 624.4 kB (13%)
4.7 MB
4.0 MB
In fact, the total size of Sei.se main page is 4.7 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. 55% of websites need less resources to load. Images take 3.9 MB which makes up the majority of the site volume.
Potential reduce by 34.7 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 5.2 kB, which is 12% 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 34.7 kB or 77% of the original size.
Potential reduce by 103.6 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. Sei images are well optimized though.
Potential reduce by 450.9 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 450.9 kB or 67% of the original size.
Potential reduce by 35.2 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. Sei.se needs all CSS files to be minified and compressed as it can save up to 35.2 kB or 80% of the original size.
Number of requests can be reduced by 36 (36%)
101
65
The browser has sent 101 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sei. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 24 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
sei.se
333 ms
www.sei-international.org
323 ms
www.sei-international.org
1282 ms
analytics.js
64 ms
hotjar-487321.js
142 ms
gtm.js
104 ms
shadowbox.css
136 ms
shadowbox.css
248 ms
jcemediabox.css
360 ms
style.css
473 ms
template.css.php
586 ms
mootools.js
809 ms
caption.js
922 ms
jcemediabox.js
1035 ms
ajax.js
1147 ms
jquery.min.js
63 ms
jquery.fpss.js
1259 ms
yoo_effects.js.php
1376 ms
shadowbox.js
1495 ms
style.css
1499 ms
jquery.js
1609 ms
easySlider.js
1397 ms
cycle.js
1486 ms
script.js
1510 ms
cookieconsent.min.css
60 ms
cookieconsent.min.js
67 ms
gatag.js
1568 ms
js
49 ms
collect
16 ms
modules-f524bccd859bfc7e394e1123f7f90405.js
37 ms
collect
58 ms
shadowbox-en.js
113 ms
shadowbox-img.js
111 ms
shadowbox-jquery.js
110 ms
ga.js
105 ms
sei_bg_new.png
114 ms
bg_red.jpg
117 ms
q1p7bh3shj8-nasa-1200px-crop.jpg
111 ms
SEI-logo-Colour.svg
343 ms
menu.png
110 ms
bg_main.png
112 ms
loading.gif
219 ms
356_edab5e545cc8cf6a49faaa8a9ea6a3d0_m.jpg
221 ms
transparent_bg.png
221 ms
360_6ddb2450462828abf9aabc88d6bfb7fe_m.jpg
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333 ms
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352_3abb66d58aa91d2b7b16f08ee38a95c0_m.jpg
444 ms
SEI-Initiative-BehaviourChoice-350x175.jpg
451 ms
SEI-Initiative-CFI-adaptation-Cambodia-350x175.jpg
453 ms
SEI-2016-blog-COP22-Climate-services.jpg
798 ms
SEI-GSE-Programme-main.jpg
543 ms
SEI-Initiatives-FossilFuels-Bakken-oil-rigs-350x175.jpg
546 ms
SEI-Initiatives-LowEmissions-LEDS-Mexico-smog-350x175.jpg
552 ms
SEI-Initiative-P2CS-350x175.jpg
565 ms
www2016-Lindastrande-kampala350%20copy.png
676 ms
SEI-2016-Blog-TDDR-Flickr-28608005950_dd1fe13514_o-550x275.jpg
654 ms
SEI-Initiative-Nexus-Ethiopia-field-350x175.jpg
655 ms
SEI_2017_Enhancing_resilience_75x80.jpg
660 ms
nature-climate-change-aoc-generic.jpg
678 ms
journal-energy-policy.gif
763 ms
SEI-journal-cover-EHP.jpg
769 ms
SEI_2017_Gender_mainstreaming_strategy_USAID_CLeanPowerAsia_75x50.png
770 ms
SEI_2017_Gender_equality_USAID_CleanPowerAsia_75x70.png
788 ms
Clean%20and%20Green%20cover%20larger.png
1017 ms
SEI-2017-DB-adaptation-agriculture-private-sector_75x106.jpg
1085 ms
SEI-2017-Journal-CoastalEngineering-Aug2017-S03783839.gif
878 ms
wrapper.js
72 ms
rcj-99d43ead6bdf30da8ed5ffcb4f17100c.html
56 ms
popup.html
809 ms
__utm.gif
16 ms
tooltip.html
795 ms
futuraheavy-webfont.woff
805 ms
SEI-2017-DB-improving-gender-inclusion.jpg
880 ms
SEI-2017-journalcover-FRACTAL-working-papers.jpg
881 ms
visit-data
351 ms
SEI-2017-PB-Heat-Energy-Dzebo-eng-140px.jpg
896 ms
SEI-report-the-aiibs-energy-opporunity120px.jpg
811 ms
journal-international-environmental-agreements.jpg
879 ms
SEI-Journal-Article-2017-Nexus-Weitz.png
881 ms
SEI-WP-2017-7-Nexus-Governance-Weitz.jpg
1021 ms
SEI-DB-2017-The-changing-politics-of-coal.jpg
803 ms
SEI-2017-OlleOlsson-GlobalWoodPelletIndustry.jpg
799 ms
SEI-2017-OlleOlsson-TheEuropeanWoodPelletMarket-A-242x350.png
852 ms
SEI-2017-journal-InternationalJournalOfDisasterRiskScience-June2017.jpg
859 ms
SEI-2017-Book-ArcticSustainabilityResearch-9781138088306.jpg
779 ms
SEI-2016-Journal-Global%20Environmental%20Change-S09593780.gif
813 ms
170612a-Gill-Nykvist-road-freight-decarbonization-DB-75x106.jpg
820 ms
sei-journal-cover-citizen-science.jpg
856 ms
searchButton.gif
862 ms
visit-data
214 ms
SEI-Banner-SEI-is-hiring-176x48.jpg
778 ms
SDGs-ourwork-176x-transparent.png
811 ms
SEI-Initiatives-grey.png
809 ms
bg_footer.png
813 ms
button_RSS.gif
763 ms
button_publarrow_up.png
769 ms
button_publarrow_down.png
767 ms
iFrame.html
28 ms
header_theme_1b.gif
113 ms
header_theme_2b.gif
116 ms
header_theme_3b.gif
110 ms
header_theme_4b.gif
114 ms
sei.se accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
sei.se best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
sei.se 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
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 Sei.se 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 Sei.se 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.
sei.se
Open Graph description is not detected on the main page of Sei. 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: