Tools & Wizards About Us

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

zerbes.de

Professioneller Werbefotograf für zuverlässige Qualität

Page Load Speed

5.3 sec in total

First Response

393 ms

Resources Loaded

4.3 sec

Page Rendered

616 ms

About Website

Welcome to zerbes.de homepage info - get ready to check Zerbes best content right away, or after learning these important things about zerbes.de

Verkaufsfördernde und werbewirksame Fotos für Ihre Firmenpräsentation, Leistungen und Produkte - Gerhard Zerbes Werbefotografie Köln

Visit zerbes.de

Key Findings

We analyzed Zerbes.de page load time and found that the first response time was 393 ms and then it took 4.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

zerbes.de performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value11.5 s

0/100

25%

SI (Speed Index)

Value14.4 s

1/100

10%

TBT (Total Blocking Time)

Value3,780 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.048

99/100

15%

TTI (Time to Interactive)

Value12.7 s

13/100

10%

Network Requests Diagram

zerbes.de

393 ms

zerbes.de

592 ms

jquery.min.js

280 ms

jquery-migrate.min.js

319 ms

werbefotografie-koeln.jpg

1106 ms

Our browser made a total of 52 requests to load all elements on the main page. We found that 65% of them (34 requests) were addressed to the original Zerbes.de, 27% (14 requests) were made to Fonts.gstatic.com and 8% (4 requests) were made to Zerbes.net. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Zerbes.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 164.1 kB (16%)

Content Size

1.0 MB

After Optimization

867.0 kB

  • HTML
  • Images

In fact, the total size of Zerbes.de main page is 1.0 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 865.4 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 135.9 kB

  • Original 165.6 kB
  • After minification 163.8 kB
  • After compression 29.7 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 135.9 kB or 82% of the original size.

Image Optimization

-3%

Potential reduce by 28.1 kB

  • Original 865.4 kB
  • After minification 837.2 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. Zerbes images are well optimized though.

Requests Breakdown

Number of requests can be reduced by 12 (34%)

Requests Now

35

After Optimization

23

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zerbes. 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 from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

zerbes.de accessibility score

78

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.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

zerbes.de best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

zerbes.de 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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zerbes.de 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 Zerbes.de 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 Zerbes. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: