leidenuniv.nl Website Information
Daily Unique Visits: 284,782
Daily Page Views: 2,278,256
Income Per Day: $2,278
Estimated Value: $2,460,240
This website is located in Netherlands and is using following IP address 132.229.13.193. See the complete list of popular websites hosted in Netherlands.
leidenuniv.nl is registered under .NL top-level domain. Please check other sites in .NL zone.
Website leidenuniv.nl is using the following name servers:
- indigo.leidenuniv.nl
- violet.leidenuniv.nl
- ns1.surfnet.nl
and is probably hosted by SURFnet bv. See the full list of other websites hosted by SURFnet bv.
The highest website leidenuniv.nl position in Alexa rank database was 5160 and the lowest rank position was 5538. Current position of leidenuniv.nl in Alexa rank database is 5351.
Desktop speed score of leidenuniv.nl (71/100) is better than the results of 52.66% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of leidenuniv.nl (99/100) is better than the results of 79.46% of other sites and means that the page is mobile-friendly.
Mobile speed score of leidenuniv.nl (44/100) is better than the results of 24.22% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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leidenuniv.nl Alexa Rank
The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.
leidenuniv.nl whois
WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.
Domain name: leidenuniv.nl
Status: active
Reseller:
TransIP
Vondellaan 47
2332AA Leiden
Netherlands
Registrar:
team.blue nl B.V.
Vondellaan 47
2332AA Leiden
Netherlands
Abuse Contact:
abuse@nl.team.blue
DNSSEC: yes
Domain nameservers:
ns1.surfnet.nl
ns3.surfnet.nl
ns2.surfnet.nl
Creation Date: 1988-10-27
Updated Date: 2024-05-15
Record maintained by: SIDN BV
Status: active
Reseller:
TransIP
Vondellaan 47
2332AA Leiden
Netherlands
Registrar:
team.blue nl B.V.
Vondellaan 47
2332AA Leiden
Netherlands
Abuse Contact:
abuse@nl.team.blue
DNSSEC: yes
Domain nameservers:
ns1.surfnet.nl
ns3.surfnet.nl
ns2.surfnet.nl
Creation Date: 1988-10-27
Updated Date: 2024-05-15
Record maintained by: SIDN BV
leidenuniv.nl server information
Servers Location
leidenuniv.nl desktop page speed rank
Last tested: 2016-09-04
Desktop Speed
Medium
71/100
leidenuniv.nl Desktop Speed Test Quick Summary
priority - 19Enable compression
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priority - 9Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
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http://www.universiteitleiden.nl/ul2ext/styles/screen.css (expiration not specified)
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http://www.universiteitleiden.nl/ul2ext/scripts/jquery.matchHeight-min.js (expiration not specified)
http://www.universiteitleiden.nl/ul2ext/scripts/main.js (expiration not specified)
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priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 2 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
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http://www.universiteitleiden.nl/ul2ext/scripts/picturefill.min.js
http://www.universiteitleiden.nl/ul2ext/scripts/picturefill.min.js
Optimize CSS Delivery of the following:
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priority - 3Reduce server response time
priority - 1Minify CSS
Compacting CSS code can save many bytes of data and speed up download and parse times.
Minify CSS for the following resources to reduce their size by 11.7KiB (20% reduction).
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priority - 1Optimize images
Properly formatting and compressing images can save many bytes of data.
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priority - 0Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 3.2KiB (21% reduction).
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priority - 0Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 3KiB (32% reduction).
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leidenuniv.nl Desktop Resource Breakdown
| Total Resources | 28 |
| Number of Hosts | 4 |
| Static Resources | 25 |
| JavaScript Resources | 8 |
| CSS Resources | 1 |
leidenuniv.nl mobile page speed rank
Last tested: 2019-12-10
Mobile Speed
Bad
44/100
leidenuniv.nl Mobile Speed Test Quick Summary
priority - 52Optimize images
Properly formatting and compressing images can save many bytes of data.
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priority - 51Avoid landing page redirects
Your page has 3 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://leidenuniv.nl/
https://www.leidenuniv.nl/
http://www.universiteitleiden.nl/
https://www.universiteitleiden.nl/
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priority - 16Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:
https://www.universiteitleiden.nl/ul2external/styles/screen.css?v=1.99.00
priority - 14Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://www.universiteitleiden.nl/binaries/content…/444-transparant-2.png (expiration not specified)
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https://www.universiteitleiden.nl/ul2common/images/world-map.png (expiration not specified)
https://www.universiteitleiden.nl/ul2common/images/zegel.png (expiration not specified)
https://www.googletagmanager.com/gtm.js?id=GTM-MR67S7X (15 minutes)
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https://www.universiteitleiden.nl/binaries/content…uels-istock.jpg/d50x50 (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…ge-headers/werving.png (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…inbergen-spotlight.jpg (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…onaal-publiekrecht.jpg (expiration not specified)
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https://www.universiteitleiden.nl/ul2common/images/world-map.png (expiration not specified)
https://www.universiteitleiden.nl/ul2common/images/zegel.png (expiration not specified)
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priority - 8Prioritize visible content
Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.
Only about 45% of the final above-the-fold content could be rendered with the full HTML response.
Click to see the screenshot with only the HTML response:
priority - 0Enable compression
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priority - 0Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 775B (15% reduction).
Minifying https://www.universiteitleiden.nl/ could save 775B (15% reduction) after compression.
leidenuniv.nl Mobile Resource Breakdown
| Total Resources | 56 |
| Number of Hosts | 16 |
| Static Resources | 20 |
| JavaScript Resources | 20 |
| CSS Resources | 1 |
leidenuniv.nl mobile page usability
Last tested: 2019-12-10
Mobile Usability
Good
99/100
leidenuniv.nl Mobile Usability Test Quick Summary
priority - 0Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target
<a href="/onderwijs/bachelors">Bacheloropleidingen</a> and 4 others are close to other tap targets.leidenuniv.nl HTML validation
Errors
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Line: 224 Column: 9 - 830
"...> <img src="/binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d480xvar" srcset="/binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d480xvar 480w, /binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d1400xvar 1400w, /binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d1920xvar 1920w, /binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d3000xvar 3000w" data-bgset=".home-hero" alt="" /> ..."
"...> <img src="/binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d480xvar" srcset="/binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d480xvar 480w, /binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d1400xvar 1400w, /binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d1920xvar 1920w, /binaries/content/gallery/ul2/main-images/general/homepage-headers/190225-header-open-dag-feb-2019.jpg/190225-header-open-dag-feb-2019.jpg/d3000xvar 3000w" data-bgset=".home-hero" alt="" /> ..."
Warnings
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Line: 228 Column: 5 - 8
"...g</p> <h1>'Met G..."
"...g</p> <h1>'Met G..."
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leidenuniv.nl Ping
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.
leidenuniv.nl TRACEROUTE
Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.