Tools & Wizards About Us

Report Summary

  • 60

    Performance

    Renders faster than
    75% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

404.si

Domov — Mladinski tehnološko - razvojni center 404

Page Load Speed

438 ms in total

First Response

15 ms

Resources Loaded

328 ms

Page Rendered

95 ms

About Website

Click here to check amazing 404 content. Otherwise, check out these important facts you probably never knew about 404.si

Vzgajajmo ustvarjalce in ustvarjalke! Tehnični projekti in delavnice za otroke in mlade ter razvojno - raziskovalni projekti. Pridite na 404!

Visit 404.si

Key Findings

We analyzed 404.si page load time and found that the first response time was 15 ms and then it took 423 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

404.si performance score

60

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

65/100

10%

LCP (Largest Contentful Paint)

Value13.5 s

0/100

25%

SI (Speed Index)

Value3.1 s

92/100

10%

TBT (Total Blocking Time)

Value300 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0.016

100/100

15%

TTI (Time to Interactive)

Value6.8 s

55/100

10%

Network Requests Diagram

404.si

15 ms

404.si

46 ms

sl

10 ms

404si.webflow.b47ab347c.min.css

54 ms

webfont.js

27 ms

Our browser made a total of 19 requests to load all elements on the main page. We found that 16% of them (3 requests) were addressed to the original 404.si, 42% (8 requests) were made to Fonts.gstatic.com and 16% (3 requests) were made to Cdn.prod.website-files.com. The less responsive or slowest element that took the longest time to load (215 ms) relates to the external source A.zerodays.dev.

Page Optimization Overview & Recommendations

Page size can be reduced by 9.8 kB (2%)

Content Size

393.2 kB

After Optimization

383.4 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of 404.si main page is 393.2 kB. 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. Javascripts take 349.6 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 9.3 kB

  • Original 11.4 kB
  • After minification 11.3 kB
  • After compression 2.1 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 9.3 kB or 81% of the original size.

JavaScript Optimization

-0%

Potential reduce by 465 B

  • Original 349.6 kB
  • After minification 349.6 kB
  • After compression 349.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 32.2 kB
  • After minification 32.2 kB
  • After compression 32.2 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. 404.si has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 3 (43%)

Requests Now

7

After Optimization

4

  • Images
  • JavaScript
  • CSS

The browser has sent 7 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 404. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

404.si accessibility score

100

Accessibility Issues

Best Practices

404.si best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

404.si SEO score

100

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

Language and Encoding

  • Language Detected

    SL

  • Language Claimed

    SL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 404.si can be misinterpreted by Google and other search engines. Our service has detected that Slovenian is used on the page, and it matches the claimed language. Our system also found out that 404.si 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

Open Graph data is detected on the main page of PARSED_DOMAIN, but there is no image specified in description. It would be a good idea for the website admin to select a nice image that can properly represent the website in Open Graph data, otherwise the first found image will be taken for this purpose and social media information block will look like this: