2.6 sec in total
46 ms
1.7 sec
812 ms
Click here to check amazing Columbia content for United States. Otherwise, check out these important facts you probably never knew about columbia.edu
Visit columbia.eduWe analyzed Columbia.edu page load time and found that the first response time was 46 ms and then it took 2.6 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.
columbia.edu performance score
name
value
score
weighting
Value5.7 s
5/100
10%
Value64.7 s
0/100
25%
Value8.7 s
16/100
10%
Value2,490 ms
4/100
30%
Value0
100/100
15%
Value20.7 s
2/100
10%
46 ms
102 ms
141 ms
226 ms
51 ms
Our browser made a total of 102 requests to load all elements on the main page. We found that 80% of them (82 requests) were addressed to the original Columbia.edu, 11% (11 requests) were made to Use.typekit.net and 2% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (996 ms) belongs to the original domain Columbia.edu.
Page size can be reduced by 1.6 MB (10%)
16.3 MB
14.7 MB
In fact, the total size of Columbia.edu main page is 16.3 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. Only a small number of websites need less resources to load. Images take 15.9 MB which makes up the majority of the site volume.
Potential reduce by 219.0 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 219.0 kB or 84% of the original size.
Potential reduce by 1.4 MB
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. Columbia images are well optimized though.
Potential reduce by 1.2 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. This website has mostly compressed JavaScripts.
Potential reduce by 54 B
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. Columbia.edu has all CSS files already compressed.
Number of requests can be reduced by 12 (13%)
90
78
The browser has sent 90 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Columbia. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
columbia.edu
46 ms
www.columbia.edu
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columbia.edu accessibility score
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
button, link, and menuitem elements do not have accessible names.
[aria-hidden="true"] elements contain focusable descendents
ARIA input fields do not have accessible names
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
columbia.edu 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
Missing source maps for large first-party JavaScript
columbia.edu 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
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
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 Columbia.edu 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 Columbia.edu 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.
columbia.edu
Open Graph description is not detected on the main page of Columbia. 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: