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techlib.cz screenshot

Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

techlib.cz

Czech National Library of Technology

Page Load Speed

8 sec in total

First Response

338 ms

Resources Loaded

7.4 sec

Page Rendered

289 ms

techlib.cz screenshot

About Website

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

National Library of Technology

Visit techlib.cz

Key Findings

We analyzed Techlib.cz page load time and found that the first response time was 338 ms and then it took 7.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

techlib.cz performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.8 s

1/100

10%

LCP (Largest Contentful Paint)

Value11.3 s

0/100

25%

SI (Speed Index)

Value14.6 s

1/100

10%

TBT (Total Blocking Time)

Value200 ms

89/100

30%

CLS (Cumulative Layout Shift)

Value0.224

56/100

15%

TTI (Time to Interactive)

Value23.1 s

1/100

10%

Network Requests Diagram

techlib.cz

338 ms

techlib.cz

459 ms

www.techlib.cz

313 ms

www.techlib.cz

437 ms

635 ms

Our browser made a total of 122 requests to load all elements on the main page. We found that 29% of them (35 requests) were addressed to the original Techlib.cz, 52% (64 requests) were made to Aleph.techlib.cz and 16% (20 requests) were made to Cache.obalkyknih.cz. The less responsive or slowest element that took the longest time to load (3.4 sec) relates to the external source Aleph.techlib.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 603.4 kB (8%)

Content Size

7.4 MB

After Optimization

6.8 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Techlib.cz main page is 7.4 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. 60% of websites need less resources to load. Images take 7.2 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 71.9 kB

  • Original 86.3 kB
  • After minification 81.7 kB
  • After compression 14.4 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 71.9 kB or 83% of the original size.

Image Optimization

-7%

Potential reduce by 486.6 kB

  • Original 7.2 MB
  • After minification 6.8 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. Techlib images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 44.9 kB

  • Original 67.4 kB
  • After minification 67.4 kB
  • After compression 22.5 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 44.9 kB or 67% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (8%)

Requests Now

89

After Optimization

82

  • Images
  • JavaScript
  • CSS

The browser has sent 89 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Techlib. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

techlib.cz

techlib.cz

338 ms

techlib.cz

techlib.cz

459 ms

www.techlib.cz

www.techlib.cz

313 ms

www.techlib.cz

www.techlib.cz

437 ms

635 ms

js.web4ukraine.org

js.web4ukraine.org

61 ms

styles.min.css

styles.min.css

423 ms

modernizr.min.js

modernizr.min.js

286 ms

jquery.min.js

jquery.min.js

513 ms

init.js

init.js

309 ms

utilities.js

utilities.js

316 ms

app.min.js

app.min.js

573 ms

cookieconsent.min.css

cookieconsent.min.css

278 ms

cookieconsent.min.js

cookieconsent.min.js

524 ms

bg.png

bg.png

404 ms

bg-orto.png

bg-orto.png

140 ms

image.pl

image.pl

853 ms

logo-ntk.png

logo-ntk.png

104 ms

logo-chektk.png

logo-chektk.png

104 ms

sprite.png

sprite.png

107 ms

671.jpg

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344 ms

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345 ms

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409 ms

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421 ms

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dobit-financni-konto-platebni-kartou.gif

344 ms

isic-logo-colour-rgb.jpg

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357 ms

83080.jpg

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347 ms

grunge_wall.png

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489 ms

ntk-pictogram.png

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409 ms

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872 ms

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979 ms

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1017 ms

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1266 ms

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1300 ms

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1331 ms

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1353 ms

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1482 ms

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1544 ms

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1631 ms

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1641 ms

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1666 ms

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1850 ms

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1997 ms

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1933 ms

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1937 ms

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2056 ms

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2027 ms

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2016 ms

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2034 ms

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2036 ms

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3368 ms

Roboto-Regular-webfont.woff

Roboto-Regular-webfont.woff

430 ms

Roboto-Light-webfont.woff

Roboto-Light-webfont.woff

528 ms

icomoon.woff

icomoon.woff

456 ms

Roboto-Medium-webfont.woff

Roboto-Medium-webfont.woff

605 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

509 ms

Univers-45-Light-Bold.ttf

Univers-45-Light-Bold.ttf

528 ms

3145f7f3-577b-4fc5-b041-fd8a5b0b2d40.woff

3145f7f3-577b-4fc5-b041-fd8a5b0b2d40.woff

529 ms

matomo.js

matomo.js

857 ms

83080.jpg

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340 ms

cover

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764 ms

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860 ms

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786 ms

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790 ms

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1476 ms

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773 ms

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1135 ms

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1063 ms

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1061 ms

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1062 ms

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1086 ms

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1264 ms

matomo.php

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226 ms

cover

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704 ms

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746 ms

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659 ms

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926 ms

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954 ms

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995 ms

cover

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678 ms

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680 ms

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561 ms

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745 ms

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766 ms

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778 ms

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2935 ms

cover

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527 ms

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805 ms

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549 ms

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708 ms

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713 ms

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742 ms

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746 ms

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1986 ms

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769 ms

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775 ms

cover

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483 ms

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748 ms

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2833 ms

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847 ms

cover

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576 ms

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832 ms

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873 ms

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884 ms

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962 ms

Accessibility Review

techlib.cz accessibility score

87

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

techlib.cz best practices score

58

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

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

techlib.cz SEO score

69

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

High

Page is blocked from indexing

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Document doesn't have a valid hreflang

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

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

techlib.cz

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