Tools & Wizards About Us
radioteka.cz screenshot

Report Summary

  • 5

    Performance

    Renders faster than
    20% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 50

    Best Practices

    More advanced features
    available than in
    18% of websites

  • 99

    SEO

    Google-friendlier than
    94% of websites

radioteka.cz

Radiotéka — Knihy, Audioknihy, CD, DVD, notové záznamy

Page Load Speed

14.1 sec in total

First Response

364 ms

Resources Loaded

13.3 sec

Page Rendered

495 ms

radioteka.cz screenshot

About Website

Click here to check amazing Radioteka content for Czech Republic. Otherwise, check out these important facts you probably never knew about radioteka.cz

Na Radioteka.cz najdete audio obsah ke stažení ve formátech MP3 a FLAC, dále pak CD, DVD, knihy a notové záznamy.

Visit radioteka.cz

Key Findings

We analyzed Radioteka.cz page load time and found that the first response time was 364 ms and then it took 13.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

radioteka.cz performance score

5

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.2 s

0/100

10%

LCP (Largest Contentful Paint)

Value23.8 s

0/100

25%

SI (Speed Index)

Value19.3 s

0/100

10%

TBT (Total Blocking Time)

Value1,700 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.805

5/100

15%

TTI (Time to Interactive)

Value14.0 s

10/100

10%

Network Requests Diagram

radioteka.cz

364 ms

www.radioteka.cz

9467 ms

bootstrap.css

218 ms

jquery-1.10.1.min.js

322 ms

jquery.jplayer.min.js

215 ms

Our browser made a total of 153 requests to load all elements on the main page. We found that 62% of them (95 requests) were addressed to the original Radioteka.cz, 10% (16 requests) were made to Rozhlas.cz and 10% (15 requests) were made to Content-core.grandit.cz. The less responsive or slowest element that took the longest time to load (9.5 sec) belongs to the original domain Radioteka.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 570.1 kB (25%)

Content Size

2.3 MB

After Optimization

1.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Radioteka.cz main page is 2.3 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 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 92.1 kB

  • Original 111.1 kB
  • After minification 94.8 kB
  • After compression 19.0 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. This page needs HTML code to be minified as it can gain 16.3 kB, which is 15% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 92.1 kB or 83% of the original size.

Image Optimization

-6%

Potential reduce by 92.0 kB

  • Original 1.7 MB
  • After minification 1.6 MB

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. Radioteka images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 204.3 kB

  • Original 307.9 kB
  • After minification 292.4 kB
  • After compression 103.6 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 204.3 kB or 66% of the original size.

CSS Optimization

-84%

Potential reduce by 181.6 kB

  • Original 216.0 kB
  • After minification 178.5 kB
  • After compression 34.4 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. Radioteka.cz needs all CSS files to be minified and compressed as it can save up to 181.6 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (21%)

Requests Now

149

After Optimization

117

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 149 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Radioteka. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

radioteka.cz

radioteka.cz

364 ms

www.radioteka.cz

www.radioteka.cz

9467 ms

bootstrap.css

bootstrap.css

218 ms

jquery-1.10.1.min.js

jquery-1.10.1.min.js

322 ms

jquery.jplayer.min.js

jquery.jplayer.min.js

215 ms

js.js

js.js

214 ms

dw_scroll_c.js

dw_scroll_c.js

217 ms

jquery.blockUI.js

jquery.blockUI.js

216 ms

jquery.fancybox.css

jquery.fancybox.css

318 ms

jquery.fancybox.pack.js

jquery.fancybox.pack.js

320 ms

teasers.css

teasers.css

343 ms

teasers.js

teasers.js

344 ms

nav.css

nav.css

345 ms

cro_footer.css

cro_footer.css

423 ms

css.css

css.css

426 ms

main.css

main.css

431 ms

design.css

design.css

433 ms

bootstrap.min.js

bootstrap.min.js

336 ms

conversion.js

conversion.js

14 ms

prettify-jPlayer.js

prettify-jPlayer.js

335 ms

scrollbar_h.css

scrollbar_h.css

184 ms

analytics.js

analytics.js

80 ms

item-logo-e6.png

item-logo-e6.png

368 ms

830x200_certoviny.jpg

830x200_certoviny.jpg

894 ms

item-zpravy.png

item-zpravy.png

345 ms

item-iradio.png

item-iradio.png

349 ms

item-program.png

item-program.png

350 ms

item-stanice.png

item-stanice.png

352 ms

item-specialy.png

item-specialy.png

351 ms

item-about.png

item-about.png

572 ms

item-eshop.png

item-eshop.png

575 ms

logo_radioteka.png

logo_radioteka.png

185 ms

bg_searchbar.png

bg_searchbar.png

185 ms

kosik_blue_header.png

kosik_blue_header.png

182 ms

arrows.png

arrows.png

186 ms

nikdonenivinen.jpg

nikdonenivinen.jpg

187 ms

idiot.jpg

idiot.jpg

240 ms

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231 ms

quentin.jpg

quentin.jpg

244 ms

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234 ms

logopedi.jpg

logopedi.jpg

231 ms

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245 ms

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367 ms

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363 ms

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369 ms

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364 ms

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363 ms

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360 ms

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478 ms

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486 ms

Toulky_1001-1050.jpg

Toulky_1001-1050.jpg

491 ms

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479 ms

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ES013244-CZ.jpg

486 ms

ES013350-CZ.jpg

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486 ms

ES005937-CZ.jpg

ES005937-CZ.jpg

600 ms

ribbon_new.png

ribbon_new.png

584 ms

romantickaopera.jpg

romantickaopera.jpg

607 ms

EH012262-CZ.jpg

EH012262-CZ.jpg

605 ms

SH012657-CZ.jpg

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608 ms

EH013450-CZ.jpg

EH013450-CZ.jpg

609 ms

zimni.jpeg

zimni.jpeg

710 ms

EH013920-CZ.jpg

EH013920-CZ.jpg

726 ms

EH013990-CZ.jpg

EH013990-CZ.jpg

735 ms

certoviny04.jpg

certoviny04.jpg

727 ms

posetilost.jpg

posetilost.jpg

733 ms

O-Piciminkovi.jpg

O-Piciminkovi.jpg

730 ms

830x200_idiot.jpg

830x200_idiot.jpg

971 ms

pripravujeme_830x200%20(2).jpg

pripravujeme_830x200%20(2).jpg

756 ms

830x200_log-poh.jpg

830x200_log-poh.jpg

853 ms

830x200_final.jpg

830x200_final.jpg

741 ms

830x200_trnka.jpg

830x200_trnka.jpg

852 ms

830x200.jpg

830x200.jpg

1167 ms

velikonoce_2016_830x200px_Sestava%201.jpg

velikonoce_2016_830x200px_Sestava%201.jpg

1290 ms

830x200_hlprelic.jpg

830x200_hlprelic.jpg

1278 ms

230x100px_final.jpg

230x100px_final.jpg

959 ms

230x100px_sv.jpg

230x100px_sv.jpg

968 ms

230x100px_svejk.jpg

230x100px_svejk.jpg

1065 ms

maturity_230x100px.jpg

maturity_230x100px.jpg

1075 ms

230x100popular.jpg

230x100popular.jpg

1078 ms

230x100px_sv.jpg

230x100px_sv.jpg

1172 ms

cvrcek.jpg

cvrcek.jpg

839 ms

collect

collect

11 ms

collect

collect

132 ms

sdk.js

sdk.js

315 ms

ico-mobil.png

ico-mobil.png

490 ms

ico-podcast.png

ico-podcast.png

494 ms

ico-rss.png

ico-rss.png

498 ms

ico-newsletter.png

ico-newsletter.png

498 ms

ico-napoveda.png

ico-napoveda.png

725 ms

ico-mapawebu.png

ico-mapawebu.png

727 ms

ico-play.png

ico-play.png

727 ms

logo-cro.png

logo-cro.png

733 ms

98 ms

AHA-rodicovstvi-tit.jpg

AHA-rodicovstvi-tit.jpg

715 ms

Polske_duse_mini.jpg

Polske_duse_mini.jpg

720 ms

po-kom-se-jmenuji.jpg

po-kom-se-jmenuji.jpg

705 ms

R339_Wajsar_HappyEnd.jpg

R339_Wajsar_HappyEnd.jpg

718 ms

R325_Gemrot_IIsymfonie.jpg

R325_Gemrot_IIsymfonie.jpg

704 ms

37 ms

ga-audiences

ga-audiences

50 ms

R333_Vicar_Zitkovska.jpg

R333_Vicar_Zitkovska.jpg

772 ms

R338_Kucera_Benedicamus.jpg

R338_Kucera_Benedicamus.jpg

777 ms

R320_Stabat.jpg

R320_Stabat.jpg

778 ms

R303_Alfred.jpg

R303_Alfred.jpg

789 ms

R343_RA15.jpg

R343_RA15.jpg

781 ms

SS013551-CZ.jpg

SS013551-CZ.jpg

777 ms

SS013571-CZ.jpg

SS013571-CZ.jpg

789 ms

nebojte_se_klasiky_9_12_komplet_maly.jpg

nebojte_se_klasiky_9_12_komplet_maly.jpg

828 ms

setkani_capek.jpg

setkani_capek.jpg

793 ms

SS006249-CZ.jpg

SS006249-CZ.jpg

788 ms

Podvoleni_audiokniha_OneHotBook.jpg

Podvoleni_audiokniha_OneHotBook.jpg

792 ms

S_eleganci_jezka_audiokniha_OneHotBook.jpg

S_eleganci_jezka_audiokniha_OneHotBook.jpg

787 ms

22 ms

xd_arbiter.php

xd_arbiter.php

212 ms

xd_arbiter.php

xd_arbiter.php

416 ms

sleva_30_sverak.jpg

sleva_30_sverak.jpg

807 ms

img_prodejna.jpg

img_prodejna.jpg

1028 ms

certoviny.jpg

certoviny.jpg

802 ms

SS013531-CZ.jpg

SS013531-CZ.jpg

789 ms

toulky_komplet_box_mini.jpg

toulky_komplet_box_mini.jpg

789 ms

quentin.jpg

quentin.jpg

815 ms

ES013743-CZ.jpg

ES013743-CZ.jpg

835 ms

toufar.jpg

toufar.jpg

805 ms

logo_klasika.gif

logo_klasika.gif

805 ms

logo-osa-partner-mini.jpg

logo-osa-partner-mini.jpg

819 ms

img.php

img.php

825 ms

logo_radioservis.png

logo_radioservis.png

902 ms

logo_gopay.png

logo_gopay.png

804 ms

logo_visa.png

logo_visa.png

798 ms

logo_mastercard.png

logo_mastercard.png

802 ms

icon_fb.png

icon_fb.png

807 ms

icon_youtube.png

icon_youtube.png

879 ms

icon_sipka.png

icon_sipka.png

883 ms

button_blue_l.png

button_blue_l.png

111 ms

button_blue_r.png

button_blue_r.png

109 ms

button_white_l.png

button_white_l.png

107 ms

button_white_r.png

button_white_r.png

107 ms

page.php

page.php

52 ms

page.php

page.php

57 ms

SAb9vLtZAm_.css

SAb9vLtZAm_.css

300 ms

6bIl72b-rkY.js

6bIl72b-rkY.js

499 ms

HUfb667Pf9k.js

HUfb667Pf9k.js

634 ms

nw0sMxy_KfY.js

nw0sMxy_KfY.js

569 ms

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285 ms

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333 ms

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400 ms

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468 ms

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wL6VQj7Ab77.png

71 ms

WTZ_Jhk-ooC.png

WTZ_Jhk-ooC.png

71 ms

R9GKCzjAnbk.js

R9GKCzjAnbk.js

68 ms

AWWjhOengNF.js

AWWjhOengNF.js

70 ms

YnSasnyq68i.js

YnSasnyq68i.js

71 ms

kQf_jlUv-kX.js

kQf_jlUv-kX.js

136 ms

Accessibility Review

radioteka.cz accessibility score

82

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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.

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

Best Practices

radioteka.cz best practices score

50

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

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

radioteka.cz SEO score

99

Search Engine Optimization Advices

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 Radioteka.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 Radioteka.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

radioteka.cz

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