Tools & Wizards About Us

Report Summary

  • 25

    Performance

    Renders faster than
    44% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

certas.ch

Alarmanlage und Alarmsystem aufschalten | Home | Certas

Page Load Speed

4.4 sec in total

First Response

290 ms

Resources Loaded

3.3 sec

Page Rendered

819 ms

About Website

Visit certas.ch now to see the best up-to-date Certas content and also check out these interesting facts you probably never knew about certas.ch

Certas reagiert bei jedem Alarm sofort. Mit einem Alarmsystem ist Ihr Unternehmen oder Zuhause beim Marktführer für Alarmmanagement in bester Sicherheit.

Visit certas.ch

Key Findings

We analyzed Certas.ch page load time and found that the first response time was 290 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

certas.ch performance score

25

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value10.9 s

0/100

25%

SI (Speed Index)

Value9.6 s

11/100

10%

TBT (Total Blocking Time)

Value1,520 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value13.2 s

12/100

10%

Network Requests Diagram

certas.ch

290 ms

certas.ch

1902 ms

cly8fzy.css

84 ms

polyfill.min.js

228 ms

p.css

37 ms

Our browser made a total of 15 requests to load all elements on the main page. We found that 67% of them (10 requests) were addressed to the original Certas.ch, 13% (2 requests) were made to Googletagmanager.com and 7% (1 request) were made to Use.typekit.net. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Certas.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 279.4 kB (48%)

Content Size

580.7 kB

After Optimization

301.4 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Certas.ch main page is 580.7 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. 30% of websites need less resources to load. HTML takes 323.2 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 272.6 kB

  • Original 323.2 kB
  • After minification 323.0 kB
  • After compression 50.6 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 272.6 kB or 84% of the original size.

Image Optimization

-3%

Potential reduce by 6.7 kB

  • Original 257.5 kB
  • After minification 250.8 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. Certas images are well optimized though.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 5 B

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.

Requests Breakdown

Number of requests can be reduced by 8 (62%)

Requests Now

13

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Certas. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

certas.ch accessibility score

81

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

certas.ch best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

certas.ch SEO score

86

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

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Certas.ch can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it matches the claimed language. Our system also found out that Certas.ch 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 description is not detected on the main page of Certas. 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: