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67 czc.cz Last Updated: 9 months

Success 78% of passed verification steps
Warning 7% of total warning
Errors 15% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 85%
Best Practices Desktop Score 85%
SEO Desktop Score 91%
Progressive Web App Desktop Score 73%
Performance Mobile Score 67%
Best Practices Mobile Score 85%
SEO Mobile Score 89%
Progressive Web App Mobile Score 74%
Page Authority Authority 47%
Domain Authority Domain Authority 76%
Moz Rank 4.7/10
Bounce Rate Rate 0%
Charset Encoding
Great, language/character encoding is specified: UTF-8
Title Tag 35 Characters
CZC.CZ - ROZUMÍME VÁM I ELEKTRONICE
Meta Description 143 Characters
Jeden z největších internetových obchodů s výpočetní technikou a elektronikou. Široká nabídka notebooků, komponent, PC sestav, montáž počítačů.
Effective URL 18 Characters
https://www.czc.cz
Excerpt Page content
CZC.cz - rozumíme vám i elektronice ...
Keywords Cloud Density
příslušenství49 herní30 geek25 position20 price20 name20 magazín19 karty17 černá16 iphone15
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
příslušenství 49
herní 30
geek 25
position 20
price 20
name 20
magazín 19
karty 17
černá 16
iphone 15
Google Preview Your look like this in google search result
CZC.CZ - ROZUMÍME VÁM I ELEKTRONICE
https://www.czc.cz
Jeden z největších internetových obchodů s výpočetní technikou a elektronikou. Široká nabídka notebooků, komponent, PC sestav, montáž počítačů.
Robots.txt File Detected
Sitemap.xml File Detected
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 / 51 years
Create on: 1970-01-01 / 51 years
Expires on: 1970-01-01 / 618 months 15 days

REG-INTERNET-CZ REG-INTERNET-CZ REG-INTERNET-CZ REG-INTERNET-CZ REG-INTERNET-CZ REG-INTERNET-CZ REG-INTERNET-CZ ,
Registrar Address: Brodská 570 Příbram 26101 CZ Sedlice 67 Rožmitál pod Třemšínem 26242 CZ Ktiš 2 Ktiš 38403 CZ Ktiš 2 Ktiš 38403 CZ ,

Josef Matějka Josef Matějka Stefano Cecconi Stefano Cecconi

Nameservers
ns.forpsi.net
ns.forpsi.cz
(81.2.209.185,
2001:15e8:201:1::d1b9)
ns.forpsi.it
Page Size Code & Text Ratio
Document Size: ~372.29 KB
Code Size: ~242.83 KB
Text Size: ~129.46 KB Ratio: 34.77%

Estimation Traffic and Earnings

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Technologies

PWA - Manifest

CZC.cz CZC.cz CZC.cz

The web app manifest is a simple JSON file that gives you, the developer, the ability to control how your app appears to the user in areas where they would expect to see apps (for example, a mobile device's home screen)
Param name
CZC.cz
Param short_name
CZC.cz
Param prefer_related_applications
1
Param theme_color
#ffffff
Param background_color
#ffffff
Param display
standalone
Manifest is not valid
Your manifest are missing some important params, read more in Web App Manifest

Desktop

Desktop Screenshot
Defer offscreen images Potential savings of 44 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 22 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 2.3 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 1.3 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 1,169 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimizes main-thread work 1.2 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 0.6 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 1 vulnerability detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Avoid chaining critical requests 4 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 3,214 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)
First Meaningful Paint 0.6 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 118 requests • 1,169 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 36 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 70 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 1.9 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
Estimated Input Latency 10 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 106 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 63 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
Reduce server response times (TTFB) Root document took 920 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 0 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 12 KB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Minimize third-party usage Third-party code blocked the main thread for 20 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 10 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
JavaScript execution time 0.3 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this

Mobile

Mobile Screenshot
Tap targets are not sized appropriately 64% 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 106 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
Server response times are low (TTFB) Root document took 260 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 580 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 12 KB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Minimize third-party usage Third-party code blocked the main thread for 0 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 170 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
JavaScript execution time 0.9 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 52 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 20 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 4.3 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 5.7 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 750 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimize main-thread work 3.3 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 2.7 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 1 vulnerability detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Avoid chaining critical requests 5 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 3,079 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)
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 95 requests • 750 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 24 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 260 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 7.2 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
First Contentful Paint (3G) 5490 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 30 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

Speed And Optimization Tips

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Alexa Rank

0

Local Rank: / Users: / PageViews:

Global Rank

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server
HTTP/1.1 200 
Set-Cookie: JSESSIONID=B5B92F3BF52780BC7F1996A0C85A4AD8; Path=/; Secure; HttpOnly; SameSite=Lax
Cache-Control: no-store
Content-Type: text/html;charset=utf-8
Content-Language: cs
Transfer-Encoding: chunked
Date: Mon, 27 Jan 2020 15:00:13 GMT
Set-Cookie: BIGipServerczc-dynamic-pool=2415962304.36895.0000; path=/; Httponly; Secure
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Strict-Transport-Security: max-age=63072000; includeSubDomains; preload
DNS Records DNS Resource Records associated with a hostname
View DNS Records

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