Report Summary

  • 6

    Performance

    Renders faster than
    30% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    34% of websites

  • 86

    SEO

    Google-friendlier than
    66% of websites

congstar.de

congstar | Mobilfunk | Smartphones | LTE | Festnetz- und Handytarife

Page Load Speed

124.6 sec in total

First Response

908 ms

Resources Loaded

67.8 sec

Page Rendered

55.9 sec

congstar.de screenshot

About Website

Welcome to congstar.de homepage info - get ready to check Congstar best content for Germany right away, or after learning these important things about congstar.de

Mobilfunkanbieter des Jahres und zwar nicht ohne Grund ✔ Günstig ✔ Fair ✔ Verträge mit und ohne Laufzeit ✔ LTE 50-Option zum Surfen mit bis zu 50Mbit/s!

Visit congstar.de

Key Findings

We analyzed Congstar.de page load time and found that the first response time was 908 ms and then it took 123.7 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 18 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

congstar.de performance score

6

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value20.8 s

0/100

25%

SI (Speed Index)

Value11.3 s

5/100

10%

TBT (Total Blocking Time)

Value12,180 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.344

32/100

15%

TTI (Time to Interactive)

Value31.7 s

0/100

10%

Network Requests Diagram

congstar.de

908 ms

www.congstar.de

1485 ms

merged-5181fe82a88c25ec33763fb5dca34691.css

3488 ms

merged-54fcf685b9900c8e946ca385de8cb9cd.css

3135 ms

jquery.min.js

1769 ms

Our browser made a total of 82 requests to load all elements on the main page. We found that 9% of them (7 requests) were addressed to the original Congstar.de, 20% (16 requests) were made to Media3.congstar-media.de and 9% (7 requests) were made to Media2.congstar-media.de. The less responsive or slowest element that took the longest time to load (26.8 sec) relates to the external source Sp.analytics.yahoo.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.1 MB (36%)

Content Size

5.6 MB

After Optimization

3.6 MB

In fact, the total size of Congstar.de main page is 5.6 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 3.3 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 213.8 kB

  • Original 248.2 kB
  • After minification 222.3 kB
  • After compression 34.5 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 213.8 kB or 86% of the original size.

Image Optimization

-9%

Potential reduce by 309.0 kB

  • Original 3.3 MB
  • After minification 3.0 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. Congstar images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 520.0 kB

  • Original 721.6 kB
  • After minification 663.4 kB
  • After compression 201.6 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 520.0 kB or 72% of the original size.

CSS Optimization

-75%

Potential reduce by 1.0 MB

  • Original 1.3 MB
  • After minification 1.3 MB
  • After compression 329.3 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. Congstar.de needs all CSS files to be minified and compressed as it can save up to 1.0 MB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 30 (52%)

Requests Now

58

After Optimization

28

The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Congstar. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

congstar.de accessibility score

80

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

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

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

congstar.de 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

Displays images with incorrect aspect ratio

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

congstar.de 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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Congstar.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Congstar.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 description is not detected on the main page of Congstar. 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: