Tools & Wizards About Us
divers-direct.cz screenshot

Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

divers-direct.cz

Potápěčské centrum Divers Direct

Page Load Speed

5.8 sec in total

First Response

647 ms

Resources Loaded

4.8 sec

Page Rendered

409 ms

divers-direct.cz screenshot

About Website

Welcome to divers-direct.cz homepage info - get ready to check Divers Direct best content for Czech Republic right away, or after learning these important things about divers-direct.cz

DIVERS DIRECT je největší potápěčské centrum v Česku, které nabízí kompletní služby pro potápěče všech tvarů a požadavků. Potápěčské potřeby, škola potápění, půjčovna a servis.

Visit divers-direct.cz

Key Findings

We analyzed Divers-direct.cz page load time and found that the first response time was 647 ms and then it took 5.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

divers-direct.cz performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

42/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value8.2 s

20/100

10%

TBT (Total Blocking Time)

Value2,010 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0.169

70/100

15%

TTI (Time to Interactive)

Value15.6 s

6/100

10%

Network Requests Diagram

divers-direct.cz

647 ms

divers-direct.cz

1074 ms

gtm.js

59 ms

theme-605ebd890.css

332 ms

css

36 ms

Our browser made a total of 150 requests to load all elements on the main page. We found that 83% of them (124 requests) were addressed to the original Divers-direct.cz, 4% (6 requests) were made to Google.com and 3% (4 requests) were made to Apis.google.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Divers-direct.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 491.0 kB (21%)

Content Size

2.3 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Divers-direct.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. 70% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 268.6 kB

  • Original 304.4 kB
  • After minification 198.1 kB
  • After compression 35.8 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 106.3 kB, which is 35% 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 268.6 kB or 88% of the original size.

Image Optimization

-10%

Potential reduce by 111.2 kB

  • Original 1.2 MB
  • After minification 1.1 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. Divers Direct images are well optimized though.

JavaScript Optimization

-16%

Potential reduce by 110.0 kB

  • Original 698.7 kB
  • After minification 698.7 kB
  • After compression 588.8 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 110.0 kB or 16% of the original size.

CSS Optimization

-1%

Potential reduce by 1.2 kB

  • Original 148.1 kB
  • After minification 148.1 kB
  • After compression 147.0 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. Divers-direct.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 23 (16%)

Requests Now

141

After Optimization

118

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 141 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Divers Direct. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

divers-direct.cz

divers-direct.cz

647 ms

divers-direct.cz

divers-direct.cz

1074 ms

gtm.js

gtm.js

59 ms

theme-605ebd890.css

theme-605ebd890.css

332 ms

css

css

36 ms

js

js

102 ms

css2

css2

50 ms

bottom-ced7a4889.js

bottom-ced7a4889.js

885 ms

platform.js

platform.js

23 ms

agent.js

agent.js

615 ms

fbevents.js

fbevents.js

133 ms

custom_texture.jpg

custom_texture.jpg

282 ms

1.jpg

1.jpg

351 ms

2.jpg

2.jpg

352 ms

3.jpg

3.jpg

353 ms

4.jpg

4.jpg

353 ms

5.jpg

5.jpg

389 ms

6.jpg

6.jpg

458 ms

logo-17149909221.jpg

logo-17149909221.jpg

459 ms

favola.webp

favola.webp

462 ms

prisl_mask-01.webp

prisl_mask-01.webp

462 ms

th_F1YELLOW.webp

th_F1YELLOW.webp

498 ms

th_BUNGEESTRAPCOLOR_zluta.webp

th_BUNGEESTRAPCOLOR_zluta.webp

572 ms

Technisub_Air_DRY_P-V_limex.webp

Technisub_Air_DRY_P-V_limex.webp

572 ms

snorkel-holder-261221.webp

snorkel-holder-261221.webp

574 ms

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573 ms

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607 ms

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629 ms

detail_MTXRIIST.webp

detail_MTXRIIST.webp

673 ms

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416555_octopus_dual_adj.webp

673 ms

hadice-lp-stredotlaka-standard-zluta-divers-direct.webp

hadice-lp-stredotlaka-standard-zluta-divers-direct.webp

680 ms

klasicke-zakety.webp

klasicke-zakety.webp

680 ms

kridla.webp

kridla.webp

727 ms

sidemount-kridla.webp

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776 ms

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836 ms

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837 ms

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838 ms

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839 ms

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839 ms

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prislusenstvi-pro-lampy.webp

870 ms

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potapecske-pocitace-a-hodinky.webp

890 ms

manometry-a-tlakomery.webp

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890 ms

kompasy.webp

kompasy.webp

906 ms

hloubkomery.webp

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906 ms

konzole.webp

konzole.webp

939 ms

hotjar-2371476.js

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190 ms

analyzatory-plynu.webp

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909 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4uaVQ.woff

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38 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4uaVQ.woff

52 ms

KFOlCnqEu92Fr1MmWUlvAA.woff

KFOlCnqEu92Fr1MmWUlvAA.woff

52 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

947 ms

material_icons.woff

material_icons.woff

867 ms

prislusenstvi-pro-pocitace.webp

prislusenstvi-pro-pocitace.webp

660 ms

prislusenstvi-pro-pristroje.webp

prislusenstvi-pro-pristroje.webp

659 ms

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th_FOCEACOMFORT5.webp

696 ms

th_ELITE.webp

th_ELITE.webp

679 ms

th_TEKNOHOOD5.webp

th_TEKNOHOOD5.webp

664 ms

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th_CLASSICBOOT.webp

663 ms

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th_GLOVES5ULTRAW.webp

696 ms

th_LCSOCKS.webp

th_LCSOCKS.webp

717 ms

th_RAMINKOSUCHEMARES.webp

th_RAMINKOSUCHEMARES.webp

767 ms

gjs.php

gjs.php

557 ms

lahve-potapecske.webp

lahve-potapecske.webp

722 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

5 ms

badge

badge

124 ms

ventily-k-lahvim.webp

ventily-k-lahvim.webp

692 ms

prislusenstvi-pro-lahve.webp

prislusenstvi-pro-lahve.webp

715 ms

prislusenstvi-pro-ventily.webp

prislusenstvi-pro-ventily.webp

750 ms

harpuny.webp

harpuny.webp

750 ms

sipy.webp

sipy.webp

733 ms

popup

popup

221 ms

collect

collect

261 ms

nahradni-dily-pro-harpuny.webp

nahradni-dily-pro-harpuny.webp

711 ms

hroty.webp

hroty.webp

699 ms

lovecke-prislusenstvi.webp

lovecke-prislusenstvi.webp

723 ms

potapecske-helmy.webp

potapecske-helmy.webp

757 ms

podvodni-komunikace.webp

podvodni-komunikace.webp

756 ms

m=_b,_tp

m=_b,_tp

10 ms

js

js

39 ms

no_rating.png

no_rating.png

39 ms

m=vhDjqd

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36 ms

kompresory-vysokotlake.webp

kompresory-vysokotlake.webp

722 ms

agent-plugin-popup.js

agent-plugin-popup.js

214 ms

podvodni-rezani-a-svareni.webp

podvodni-rezani-a-svareni.webp

616 ms

hadice-kabely-a-konektory-jpg.webp

hadice-kabely-a-konektory-jpg.webp

644 ms

podvodni-video-systemy-jpg.webp

podvodni-video-systemy-jpg.webp

668 ms

zvedaci-vaky-a-plovaky-jpg.webp

zvedaci-vaky-a-plovaky-jpg.webp

705 ms

hy-ds-dc_p.webp

hy-ds-dc_p.webp

706 ms

api.js

api.js

18 ms

m=Wt6vjf,hhhU8,FCpbqb,WhJNk

m=Wt6vjf,hhhU8,FCpbqb,WhJNk

17 ms

m=lwddkf,EFQ78c

m=lwddkf,EFQ78c

19 ms

HYPERLITE1.webp

HYPERLITE1.webp

799 ms

potapecske-batohy-a-tasky.webp

potapecske-batohy-a-tasky.webp

690 ms

m=RqjULd

m=RqjULd

11 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

7 ms

potapecske-noze.webp

potapecske-noze.webp

697 ms

bojka-dekompresni-db-lola.webp

bojka-dekompresni-db-lola.webp

711 ms

11f8e7b0f954ab3a295b6a.webp

11f8e7b0f954ab3a295b6a.webp

746 ms

karabiny-a-prezky.webp

karabiny-a-prezky.webp

745 ms

cepice-flex-hat-km-37-kirby-morgan.jpg

cepice-flex-hat-km-37-kirby-morgan.jpg

732 ms

naradi.jpg

naradi.jpg

740 ms

zateze-a-opasky.jpg

zateze-a-opasky.jpg

717 ms

podvodni-skutry.jpg

podvodni-skutry.jpg

756 ms

nafukovadla.webp

nafukovadla.webp

713 ms

subwing.webp

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713 ms

knihy-o-potapeni-2.webp

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662 ms

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686 ms

nouzove-a-zachranne-prostredky.webp

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681 ms

box-storm-case-im-2050-s-penovou-vyplni.webp

box-storm-case-im-2050-s-penovou-vyplni.webp

694 ms

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646 ms

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634 ms

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628 ms

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651 ms

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683 ms

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692 ms

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659 ms

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676 ms

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665 ms

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685 ms

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685 ms

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691 ms

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656 ms

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674 ms

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665 ms

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663 ms

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980 ms

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781 ms

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652 ms

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655 ms

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661 ms

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666 ms

mares-pocitac-smart-mares.jpg

mares-pocitac-smart-mares.jpg

718 ms

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seac-sub-neopren-space-5-mm-pansky.jpg

693 ms

tusa-maska-freedom-elite.jpg

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682 ms

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685 ms

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731 ms

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747 ms

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Accessibility Review

divers-direct.cz accessibility score

87

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

<frame> or <iframe> elements do not have a title

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

divers-direct.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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

divers-direct.cz SEO score

90

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 Divers-direct.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 Divers-direct.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

divers-direct.cz

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