Tools & Wizards About Us
nuv.cz screenshot

Report Summary

  • 46

    Performance

    Renders faster than
    64% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

nuv.cz

Národní pedagogický institut České republiky (dříve Národní ústav pro vzdělávání)

Page Load Speed

3.8 sec in total

First Response

515 ms

Resources Loaded

3 sec

Page Rendered

303 ms

nuv.cz screenshot

About Website

Visit nuv.cz now to see the best up-to-date Nuv content for Turkey and also check out these interesting facts you probably never knew about nuv.cz

Stránky Národního ústavu pro vzdělávání, školské poradenské zařízení a zařízení pro další vzdělávání pedagogických pracovníků.

Visit nuv.cz

Key Findings

We analyzed Nuv.cz page load time and found that the first response time was 515 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

nuv.cz performance score

46

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value10.6 s

0/100

25%

SI (Speed Index)

Value12.1 s

4/100

10%

TBT (Total Blocking Time)

Value110 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.088

92/100

15%

TTI (Time to Interactive)

Value9.5 s

30/100

10%

Network Requests Diagram

nuv.cz

515 ms

archiv-nuv.npi.cz

316 ms

ga.js

11 ms

inline-1.css

98 ms

calendar-blue-1.css

195 ms

Our browser made a total of 92 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Nuv.cz, 93% (86 requests) were made to Archiv-nuv.npi.cz and 2% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (850 ms) relates to the external source Archiv-nuv.npi.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 141.9 kB (13%)

Content Size

1.1 MB

After Optimization

917.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Nuv.cz main page is 1.1 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. 65% of websites need less resources to load. Images take 850.2 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 36.2 kB

  • Original 47.0 kB
  • After minification 46.6 kB
  • After compression 10.7 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 36.2 kB or 77% of the original size.

Image Optimization

-9%

Potential reduce by 80.2 kB

  • Original 850.2 kB
  • After minification 770.0 kB

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. Nuv images are well optimized though.

JavaScript Optimization

-15%

Potential reduce by 19.6 kB

  • Original 134.5 kB
  • After minification 134.5 kB
  • After compression 114.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 19.6 kB or 15% of the original size.

CSS Optimization

-21%

Potential reduce by 5.8 kB

  • Original 27.5 kB
  • After minification 27.5 kB
  • After compression 21.6 kB

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. Nuv.cz needs all CSS files to be minified and compressed as it can save up to 5.8 kB or 21% of the original size.

Requests Breakdown

Number of requests can be reduced by 35 (49%)

Requests Now

71

After Optimization

36

  • Images
  • JavaScript
  • CSS

The browser has sent 71 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Nuv. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

nuv.cz

nuv.cz

515 ms

archiv-nuv.npi.cz

archiv-nuv.npi.cz

316 ms

ga.js

ga.js

11 ms

inline-1.css

inline-1.css

98 ms

calendar-blue-1.css

calendar-blue-1.css

195 ms

jquery-2.1.1.min.js

jquery-2.1.1.min.js

306 ms

owl.carousel.min.js

owl.carousel.min.js

203 ms

owl.carousel-1.css

owl.carousel-1.css

212 ms

owl.theme-1.css

owl.theme-1.css

214 ms

sudo.js

sudo.js

215 ms

misc.js

misc.js

290 ms

jquery.js

jquery.js

302 ms

nuv-1.css

nuv-1.css

424 ms

mobile-1.css

mobile-1.css

326 ms

prototype.js

prototype.js

435 ms

scriptaculous.js

scriptaculous.js

386 ms

carousel.js

carousel.js

404 ms

qcm.js

qcm.js

404 ms

global.js

global.js

434 ms

swfobject.js

swfobject.js

482 ms

calendar.js

calendar.js

507 ms

calendar-setup.js

calendar-setup.js

504 ms

calendar-cs.js

calendar-cs.js

529 ms

obscura.js

obscura.js

541 ms

tracker.js

tracker.js

540 ms

behavior.js

behavior.js

578 ms

dots.js

dots.js

605 ms

__utm.gif

__utm.gif

12 ms

collect

collect

28 ms

css

css

186 ms

css-1

css-1

212 ms

builder.js

builder.js

100 ms

effects.js

effects.js

109 ms

dragdrop.js

dragdrop.js

103 ms

controls.js

controls.js

111 ms

slider.js

slider.js

104 ms

sound.js

sound.js

106 ms

qcmclient.js

qcmclient.js

98 ms

qcmtools.js

qcmtools.js

109 ms

czech.gif

czech.gif

103 ms

usa.gif

usa.gif

137 ms

aaa.jpg

aaa.jpg

202 ms

08.jpg

08.jpg

216 ms

09.jpg

09.jpg

302 ms

07.jpg

07.jpg

212 ms

01.jpg

01.jpg

293 ms

02.jpg

02.jpg

327 ms

10.jpg

10.jpg

404 ms

00.jpg

00.jpg

318 ms

06.jpg

06.jpg

431 ms

05.jpg

05.jpg

390 ms

logo.png

logo.png

403 ms

IA.png

IA.png

424 ms

ref.png

ref.png

436 ms

234x60.jpg

234x60.jpg

487 ms

banner_europass.jpg

banner_europass.jpg

504 ms

banner_nicm.jpg

banner_nicm.jpg

505 ms

banner_rvp.jpg

banner_rvp.jpg

530 ms

isa___banner___300x50.gif

isa___banner___300x50.gif

643 ms

ttnet.gif

ttnet.gif

543 ms

STU.gif

STU.gif

583 ms

REFERNET.gif

REFERNET.gif

604 ms

CENTRES%20banner.jpg

CENTRES%20banner.jpg

705 ms

logo.png

logo.png

629 ms

ico-home.png

ico-home.png

645 ms

lan-bg.png

lan-bg.png

675 ms

social-icons-sprite.png

social-icons-sprite.png

701 ms

hp-content-bg.png

hp-content-bg.png

737 ms

carousel-arrow-prev-white.png

carousel-arrow-prev-white.png

744 ms

carousel-arrow-next-white.png

carousel-arrow-next-white.png

753 ms

carousel-arrow-prev-blue.png

carousel-arrow-prev-blue.png

771 ms

carousel-arrow-next-blue.png

carousel-arrow-next-blue.png

800 ms

li-arrow-white.png

li-arrow-white.png

803 ms

cal-month.png

cal-month.png

842 ms

cal-days.png

cal-days.png

850 ms

all.js

all.js

90 ms

all.js

all.js

9 ms

ieVl2ZhZI2eCN5jzbjEETS9weq8-19y7CA.ttf

ieVl2ZhZI2eCN5jzbjEETS9weq8-19y7CA.ttf

768 ms

ieVi2ZhZI2eCN5jzbjEETS9weq8-33mZGCoYag.ttf

ieVi2ZhZI2eCN5jzbjEETS9weq8-33mZGCoYag.ttf

740 ms

ieVi2ZhZI2eCN5jzbjEETS9weq8-32meGCoYag.ttf

ieVi2ZhZI2eCN5jzbjEETS9weq8-32meGCoYag.ttf

709 ms

KFOmCnqEu92Fr1Mu7GxP.ttf

KFOmCnqEu92Fr1Mu7GxP.ttf

708 ms

KFOlCnqEu92Fr1MmEU9fChc9.ttf

KFOlCnqEu92Fr1MmEU9fChc9.ttf

748 ms

KFOlCnqEu92Fr1MmSU5fChc9.ttf

KFOlCnqEu92Fr1MmSU5fChc9.ttf

680 ms

KFOlCnqEu92Fr1MmWUlfChc9.ttf

KFOlCnqEu92Fr1MmWUlfChc9.ttf

697 ms

calbg.png

calbg.png

679 ms

ico-top.png

ico-top.png

695 ms

logo-foot.png

logo-foot.png

633 ms

main-carousel-arrow-prev-white.png

main-carousel-arrow-prev-white.png

665 ms

main-carousel-arrow-next-white.png

main-carousel-arrow-next-white.png

672 ms

perex-bg.png

perex-bg.png

645 ms

print-1.css

print-1.css

98 ms

handheld-1.css

handheld-1.css

99 ms

Accessibility Review

nuv.cz accessibility score

93

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Best Practices

nuv.cz best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

nuv.cz SEO score

88

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Nuv.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Nuv.cz 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.

Social Sharing Optimization

nuv.cz

Open Graph description is not detected on the main page of Nuv. 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: