Access tarifcheck.o2online.de. o2 | Mobilfunkanbieter für Handytarif, Smartphone & Internet

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value12.7 s

0/100

25%

SI (Speed Index)

Value14.9 s

1/100

10%

TBT (Total Blocking Time)

Value9,560 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.056

98/100

15%

TTI (Time to Interactive)

Value17.1 s

4/100

10%

www.o2online.de

702 ms

loader.js

80 ms

install.js

58 ms

bundle.css

446 ms

sha256.min.js

441 ms

Our browser made a total of 75 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Tarifcheck.o2online.de, 24% (18 requests) were made to Library.telefonica.de and 5% (4 requests) were made to O2online.de. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Static2.o9.de.

Content Size

501.0 kB

After Optimization

330.7 kB

In fact, the total size of Tarifcheck.o2online.de main page is 501.0 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. 55% of websites need less resources to load. Javascripts take 307.8 kB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 169.3 kB

Original 193.2 kB
After minification 189.8 kB
After compression 24.0 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 169.3 kB or 88% of the original size.

JavaScript Optimization

-0%

Potential reduce by 1.0 kB

Original 307.8 kB
After minification 307.7 kB
After compression 306.8 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.

Requests Now

After Optimization

The browser has sent 71 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tarifcheck O2 Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

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.

High

[aria-*] attributes do not match their roles

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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.

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

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

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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/).

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 Tarifcheck.o2online.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 Tarifcheck.o2online.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

tarifcheck.o2online.de

Open Graph data is detected on the main page of Tarifcheck O2 Online. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

o2 | Mobilfunkanbieter für Handytarif, Smartphone & Internet

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

www.o2online.de

loader.js

install.js

bundle.css

sha256.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

JavaScript Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

www.o2online.de

loader.js

install.js

bundle.css

sha256.min.js

adspace-trbo.js

trbo_12897_06a204cf5064fdf6e30c998bdf5f0f6b.js

alert-tracking-js-code

bundle.js

bundle.js

bundle.js

bundle.js

bundle.js

bundle.js

bundle.js

product-code-teaser-standard-occl-css

bundle.js

bundle.js

bundle.js

bundle.js

vertrag-kuendigen-js-code

bundle.js

bundle.js

bundle.js

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apple-mobilfunk-apple-iphone-15-serie-bild-data.webp

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samsung-galaxy-s24-tab-a9-wifi-teaser-bild.webp

apple-iphone-15-pro-max-256gb-titan-schwarz-mit-watch-ultra-2-ocean-blue-teaser-bild-data.webp

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