6 sec in total
1 sec
4.8 sec
145 ms
Click here to check amazing Osef content. Otherwise, check out these important facts you probably never knew about osef.org
The Open Source Education Foundation is enhancing technology for K-12 education. Information about all of OSEF's research and projects can be found here, including; GOVIA, K12 Labs, Project Snowball.
Visit osef.orgWe analyzed Osef.org page load time and found that the first response time was 1 sec and then it took 4.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
osef.org performance score
name
value
score
weighting
Value0.9 s
100/100
10%
Value0.9 s
100/100
25%
Value0.9 s
100/100
10%
Value0 ms
100/100
30%
Value0.393
26/100
15%
Value0.9 s
100/100
10%
1023 ms
3765 ms
3701 ms
3698 ms
3698 ms
Our browser made a total of 13 requests to load all elements on the main page. We found that all of those requests were addressed to Osef.org and no external sources were called. The less responsive or slowest element that took the longest time to load (3.8 sec) belongs to the original domain Osef.org.
Page size can be reduced by 15.1 kB (32%)
46.7 kB
31.6 kB
In fact, the total size of Osef.org main page is 46.7 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 29.0 kB which makes up the majority of the site volume.
Potential reduce by 13.8 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 3.2 kB, which is 18% 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 13.8 kB or 78% of the original size.
Potential reduce by 1.2 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. Osef images are well optimized though.
We found no issues to fix!
11
11
The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Osef. According to our analytics all requests are already optimized.
osef.org
1023 ms
ool.tt.png
3765 ms
ool.bb.png
3701 ms
b_corner_r.gif
3698 ms
tfs.jpg
3698 ms
corner.gif
3699 ms
corner_r.gif
3699 ms
osef-icon.png
3763 ms
govia.ico.jpg
3763 ms
k12labs.ico.gif
3762 ms
member80.png
3764 ms
b_corner_l.gif
3707 ms
member160.gif
3767 ms
osef.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.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
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
Links do not have a discernible name
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
List items (<li>) are not contained within <ul> or <ol> parent elements.
osef.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
Browser errors were logged to the console
osef.org 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
Image elements do not have [alt] attributes
EN
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Osef.org 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 Osef.org 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.
osef.org
Open Graph description is not detected on the main page of Osef. 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: