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Top Technologies

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CDN

21 costco.co.uk Last Updated: 2 weeks

Success 32% of passed verification steps
Warning 30% of total warning
Errors 38% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 57%
Best Practices Desktop Score 62%
SEO Desktop Score 91%
Progressive Web App Desktop Score 31%
Performance Mobile Score 32%
Best Practices Mobile Score 62%
SEO Mobile Score 91%
Progressive Web App Mobile Score 33%
Page Authority Authority 49%
Domain Authority Domain Authority 67%
Moz Rank 4.9/10
Bounce Rate Rate 0%
Title Tag 13 Characters
ACCESS DENIED
Meta Description 0 Characters
NO DATA
Effective URL 24 Characters
https://www.costco.co.uk
Excerpt Page content
Access Denied Access Denied You don't have permission to access "http://www.costco.co.uk/" on this server. Reference #18.e43c5168.1581199849.a16273e
Keywords Cloud Density
access2 denied1 permission1 http1 costco1 server1 reference1 e43c51681 a16273e1
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
access 2
denied 1
permission 1
http 1
costco 1
server 1
reference 1
e43c5168 1
a16273e 1
Google Preview Your look like this in google search result
ACCESS DENIED
https://www.costco.co.uk
Access Denied Access Denied You don't have permission to access "http://www.costco.co.uk/" on this server. Reference #18.e43c5168.1581199849.a16273e
Robots.txt File No Found
Sitemap.xml File No Found
Page Size Code & Text Ratio
Document Size: ~269 B
Code Size: ~66 B
Text Size: ~203 B Ratio: 75.46%

Social Data

Delicious Total: 0
Facebook Total: 12,664
Google Total: 0
Linkedin Total: 0
Pinterest Total: 0
Stumbleupon Total: 0
Tumblr Total: 0
Vk Total: 0

Estimation Traffic and Earnings

27,048
Unique Visits
Daily
50,038
Pages Views
Daily
$32
Income
Daily
757,344
Unique Visits
Monthly
1,426,083
Pages Views
Monthly
$800
Income
Monthly
8,763,552
Unique Visits
Yearly
16,812,768
Pages Views
Yearly
$8,448
Income
Yearly

Technologies

PWA - Manifest

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

Desktop

Desktop Screenshot
Use video formats for animated content Potential savings of 109 KB
Large GIFs are inefficient for delivering animated content. Consider using MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF to save network bytes
Serve static assets with an efficient cache policy 96 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 490 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 4.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive
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 18.2 s
A fast page load over a cellular network ensures a good mobile user experience
Estimated Input Latency 70 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
Remove unused CSS Potential savings of 95 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
Uses deprecated APIs 1 warning found
Deprecated APIs will eventually be removed from the browser
Serve images in next-gen formats Potential savings of 289 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 37 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 70 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 700 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Reduce the impact of third-party code Third-party code blocked the main thread for 520 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 510 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Reduce JavaScript execution time 1.5 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 439 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 165 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 2.6 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 2.8 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).
Avoids enormous network payloads Total size was 2,398 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimize main-thread work 3.0 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 1.1 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
Avoid chaining critical requests 12 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 5,647 elements
A large DOM will 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)
Preload key requests Potential savings of 260 ms
Consider using `<link rel=preload>` to prioritize fetching resources that are currently requested later in page load
First Meaningful Paint 1.1 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 139 requests • 2,398 KB
To set budgets for the quantity and size of page resources, add a budget.json file

Mobile

Mobile Screenshot
Avoid chaining critical requests 12 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 5,661 elements
A large DOM will 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)
Preload key requests Potential savings of 1,680 ms
Consider using `<link rel=preload>` to prioritize fetching resources that are currently requested later in page load
First Meaningful Paint 2.7 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 133 requests • 2,320 KB
To set budgets for the quantity and size of page resources, add a budget.json file
Use video formats for animated content Potential savings of 119 KB
Large GIFs are inefficient for delivering animated content. Consider using MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF to save network bytes
Serve static assets with an efficient cache policy 90 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 2,180 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 18.4 s
Time to interactive is the amount of time it takes for the page to become fully interactive
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 18.4 s
A fast page load over a cellular network ensures a good mobile user experience
First Contentful Paint (3G) 5385 ms
First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network
Estimated Input Latency 1,350 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
Tap targets are not sized appropriately 97% 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 100% 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 95 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
Uses deprecated APIs 1 warning found
Deprecated APIs will eventually be removed from the browser
Serve images in next-gen formats Potential savings of 261 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 37 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 40 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 1,350 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Reduce the impact of third-party code Third-party code blocked the main thread for 4,550 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 4,740 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Reduce JavaScript execution time 7.7 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 477 KB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive
Properly size images Potential savings of 9 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 7.7 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 12.6 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).
Avoids enormous network payloads Total size was 2,320 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimize main-thread work 12.4 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 2.6 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

Speed And Optimization Tips

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Alexa Rank

60,077

Global Rank

1,603

United Kingdom
Traffic
Search

Domain Available

Domain (TDL) and Typo Status
costco.co.co Already Registered
costco.co.us Already Registered
costco.co.com Already Registered
costco.co.org Already Registered
costco.co.net Already Registered
cstco.co.uk Already Registered
dostco.co.uk Already Registered
rostco.co.uk Already Registered

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server
HTTP/2 403 
server: AkamaiGHost
mime-version: 1.0
content-type: text/html
content-length: 269
cache-control: max-age=0
expires: Sat, 08 Feb 2020 22:10:50 GMT
date: Sat, 08 Feb 2020 22:10:50 GMT
strict-transport-security: max-age=31536000 ; includeSubDomains ; preload

Comments