Tools & Wizards About Us

Report Summary

  • 4

    Performance

    Renders faster than
    20% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

flightradar24.com

Live Flight Tracker - Real-Time Flight Tracker Map | Flightradar24

Page Load Speed

1.3 sec in total

First Response

222 ms

Resources Loaded

1.1 sec

Page Rendered

56 ms

About Website

Welcome to flightradar24.com homepage info - get ready to check Flightradar24 best content for United States right away, or after learning these important things about flightradar24.com

Flightradar24 is the best live flight tracker that shows air traffic in real time. Best coverage and cool features!

Visit flightradar24.com

Key Findings

We analyzed Flightradar24.com page load time and found that the first response time was 222 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

flightradar24.com performance score

4

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.9 s

0/100

10%

LCP (Largest Contentful Paint)

Value17.8 s

0/100

25%

SI (Speed Index)

Value13.9 s

1/100

10%

TBT (Total Blocking Time)

Value4,040 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.4

25/100

15%

TTI (Time to Interactive)

Value18.4 s

3/100

10%

Network Requests Diagram

flightradar24.com

222 ms

www.flightradar24.com

486 ms

main.css

75 ms

fr24_index.css

58 ms

191933-126936749825897.js

81 ms

Our browser made a total of 15 requests to load all elements on the main page. We found that 27% of them (4 requests) were addressed to the original Flightradar24.com, 20% (3 requests) were made to Cdn.cookielaw.org and 13% (2 requests) were made to Securepubads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (486 ms) belongs to the original domain Flightradar24.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 37.7 kB (7%)

Content Size

510.9 kB

After Optimization

473.2 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Flightradar24.com main page is 510.9 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. 45% of websites need less resources to load. Javascripts take 472.6 kB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 10.1 kB

  • Original 14.7 kB
  • After minification 14.7 kB
  • After compression 4.6 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 10.1 kB or 69% of the original size.

JavaScript Optimization

-1%

Potential reduce by 5.6 kB

  • Original 472.6 kB
  • After minification 472.6 kB
  • After compression 467.0 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

-93%

Potential reduce by 22.0 kB

  • Original 23.6 kB
  • After minification 1.7 kB
  • After compression 1.6 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. Flightradar24.com needs all CSS files to be minified and compressed as it can save up to 22.0 kB or 93% of the original size.

Requests Breakdown

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

Requests Now

13

After Optimization

5

  • AJAX
  • JavaScript
  • CSS

The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Flightradar24. 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

flightradar24.com accessibility score

85

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

flightradar24.com 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

flightradar24.com 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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Flightradar24.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Flightradar24.com 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 Flightradar24. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: