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Web Frameworks

19 vanderbilt.edu Last Updated: 4 weeks

Success 40% of passed verification steps
Warning 30% of total warning
Errors 30% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 85%
Best Practices Desktop Score 54%
SEO Desktop Score 89%
Progressive Web App Desktop Score 27%
Performance Mobile Score 41%
Best Practices Mobile Score 54%
SEO Mobile Score 87%
Progressive Web App Mobile Score 30%
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Charset Encoding
Great, language/character encoding is specified: UTF-8
Title Tag 33 Characters
VANDERBILT UNIVERSITY
Meta Description 159 Characters
Vanderbilt University, located in Nashville, Tenn., is a private research university offering a full range of undergraduate, graduate and professional degrees.
Effective URL 30 Characters
Excerpt Page content
Vanderbilt University Skip to main content About ...
Keywords Cloud Density
vanderbilt36 research11 alumni10 students9 more9 university8 school8 faculty7 vandygram7 chancellor7
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
vanderbilt 36
research 11
alumni 10
students 9
more 9
university 8
school 8
faculty 7
vandygram 7
chancellor 7
Google Preview Your look like this in google search result
VANDERBILT UNIVERSITY
https://www.vanderbilt.edu:443
Vanderbilt University, located in Nashville, Tenn., is a private research university offering a full range of undergraduate, graduate and professional
Robots.txt File No Found
Sitemap.xml File No Found
Whois Is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system
Updated: 1970-01-01 / 50 years
Create on: 1970-01-01 / 50 years
Expires on: 1970-01-01 / 607 months 1 days
Page Size Code & Text Ratio
Document Size: ~57.47 KB
Code Size: ~40.85 KB
Text Size: ~16.62 KB Ratio: 28.92%

Social Data

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Estimation Traffic and Earnings

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Technologies

PWA - Manifest

Manifest is not valid
Your site don't have valid manifest.json, read more in Web App Manifest

Desktop

Desktop Screenshot
Serve images in next-gen formats Potential savings of 3,727 KB
Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
User Timing marks and measures 3 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Reduce server response times (TTFB) Root document took 610 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 150 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Enable text compression Potential savings of 161 KB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Efficiently encode images Potential savings of 568 KB
Optimized images load faster and consume less cellular data
Reduce the impact of third-party code Third-party code blocked the main thread for 280 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Total Blocking Time 140 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
JavaScript execution time 0.7 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Defer offscreen images Potential savings of 1,724 KB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Properly size images Potential savings of 3 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 1.7 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 2.3 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input
Avoid enormous network payloads Total size was 6,275 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimizes main-thread work 1.6 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.
First Contentful Paint 0.9 s
First Contentful Paint marks the time at which the first text or image is painted
Includes front-end JavaScript libraries with known security vulnerabilities 7 vulnerabilities detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Minimize Critical Requests Depth 23 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Avoid an excessive DOM size 982 elements
Browser engineers recommend pages contain fewer than ~1,500 DOM elements. The sweet spot is a tree depth < 32 elements and fewer than 60 children/parent element. A large DOM can increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
First Meaningful Paint 0.9 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 98 requests • 20,074 KB
To set budgets for the quantity and size of page resources, add a budget.json file
Serve static assets with an efficient cache policy 39 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 170 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 2.8 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Links do not have descriptive text 9 links found
Descriptive link text helps search engines understand your content
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Page load is not fast enough on mobile networks Interactive on simulated mobile network at 13.6 s
A fast page load over a cellular network ensures a good mobile user experience
Estimated Input Latency 20 ms
Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy
Minify CSS Potential savings of 16 KB
Minifying CSS files can reduce network payload sizes
Remove unused CSS Potential savings of 171 KB
Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity

Mobile

Mobile Screenshot
Time to Interactive 12.5 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Links do not have descriptive text 9 links found
Descriptive link text helps search engines understand your content
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Page load is not fast enough on mobile networks Interactive at 12.5 s
A fast page load over a cellular network ensures a good mobile user experience
Estimated Input Latency 80 ms
Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy
First Contentful Paint (3G) 6750 ms
First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network
Minify CSS Potential savings of 16 KB
Minifying CSS files can reduce network payload sizes
Tap targets are not sized appropriately 69% appropriately sized tap targets
Interactive elements like buttons and links should be large enough (48x48px), and have enough space around them, to be easy enough to tap without overlapping onto other elements
Document uses legible font sizes 98.78% legible text
Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px
Remove unused CSS Potential savings of 177 KB
Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity
Serve images in next-gen formats Potential savings of 3,727 KB
Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
User Timing marks and measures 3 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Server response times are low (TTFB) Root document took 220 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 390 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Efficiently encode images Potential savings of 568 KB
Optimized images load faster and consume less cellular data
Enable text compression Potential savings of 161 KB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Reduce the impact of third-party code Third-party code blocked the main thread for 1,070 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Total Blocking Time 560 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Reduce JavaScript execution time 2.0 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Defer offscreen images Potential savings of 1,243 KB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive
Speed Index 5.4 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 9.3 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input
Avoid enormous network payloads Total size was 6,251 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimize main-thread work 3.7 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.
First Contentful Paint 3.3 s
First Contentful Paint marks the time at which the first text or image is painted
Includes front-end JavaScript libraries with known security vulnerabilities 7 vulnerabilities detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Minimize Critical Requests Depth 19 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Avoid an excessive DOM size 982 elements
Browser engineers recommend pages contain fewer than ~1,500 DOM elements. The sweet spot is a tree depth < 32 elements and fewer than 60 children/parent element. A large DOM can increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
First Meaningful Paint 3.3 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 92 requests • 20,050 KB
To set budgets for the quantity and size of page resources, add a budget.json file
Serve static assets with an efficient cache policy 39 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 450 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task

Speed And Optimization Tips

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Alexa Rank

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Domain Available

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Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server
HTTP/1.1 200 OK
Date: Mon, 14 Oct 2019 12:02:09 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Server: Apache/2.4.39 (Amazon) OpenSSL/1.0.2k-fips PHP/5.6.40
X-Powered-By: PHP/5.6.40
Set-Cookie: AWSALB=0dekkGMUJ170/HI6RKaq+ZL3wqJKbJ4y0aq4IbmkGVfue68lM8uw2JOp9iTZM6J7uyMZUcXTdaBDsAyf485MGQGaES5ucUGAYGq4KXPk/9djuR9Y5FHUsWEkcmPk; Expires=Mon, 21 Oct 2019 12:02:09 GMT; Path=/
DNS Records DNS Resource Records associated with a hostname
View DNS Records

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