1.5 sec in total
39 ms
1.2 sec
186 ms
Click here to check amazing Rare Diseases content for United States. Otherwise, check out these important facts you probably never knew about rarediseases.org
NORD is dedicated to supporting education, elevating care, advancing research, and driving policy for rare diseases
Visit rarediseases.orgWe analyzed Rarediseases.org page load time and found that the first response time was 39 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.
rarediseases.org performance score
name
value
score
weighting
Value4.6 s
14/100
10%
Value22.1 s
0/100
25%
Value9.2 s
13/100
10%
Value1,340 ms
17/100
30%
Value0.674
8/100
15%
Value16.7 s
5/100
10%
39 ms
30 ms
17 ms
13 ms
12 ms
Our browser made a total of 118 requests to load all elements on the main page. We found that 86% of them (101 requests) were addressed to the original Rarediseases.org, 5% (6 requests) were made to Fonts.gstatic.com and 3% (3 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (580 ms) relates to the external source Fonts.gstatic.com.
Page size can be reduced by 1.9 MB (52%)
3.6 MB
1.7 MB
In fact, the total size of Rarediseases.org main page is 3.6 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. Javascripts take 1.5 MB which makes up the majority of the site volume.
Potential reduce by 190.5 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 190.5 kB or 82% of the original size.
Potential reduce by 108.2 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. Rare Diseases images are well optimized though.
Potential reduce by 1.1 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 1.1 MB or 71% of the original size.
Potential reduce by 535.9 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. Rarediseases.org needs all CSS files to be minified and compressed as it can save up to 535.9 kB or 84% of the original size.
Number of requests can be reduced by 73 (66%)
110
37
The browser has sent 110 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rare Diseases. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 41 to 1 for JavaScripts and from 34 to 1 for CSS and as a result speed up the page load time.
rarediseases.org
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rarediseases.org 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.
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
Links do not have a discernible name
rarediseases.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
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
rarediseases.org 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 doesn't use legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rarediseases.org 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 Rarediseases.org 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.
rarediseases.org
Open Graph description is not detected on the main page of Rare Diseases. 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: