Tools & Wizards About Us
jfree.org screenshot

Report Summary

  • 99

    Performance

    Renders faster than
    96% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

jfree.org

www.jfree.org

Page Load Speed

1.6 sec in total

First Response

306 ms

Resources Loaded

1.2 sec

Page Rendered

76 ms

jfree.org screenshot

About Website

Click here to check amazing Jfree content for India. Otherwise, check out these important facts you probably never knew about jfree.org

The official home page for JFree.

Visit jfree.org

Key Findings

We analyzed Jfree.org page load time and found that the first response time was 306 ms and then it took 1.3 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

jfree.org performance score

99

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.5 s

96/100

10%

LCP (Largest Contentful Paint)

Value1.7 s

99/100

25%

SI (Speed Index)

Value2.1 s

99/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value1.6 s

100/100

10%

Network Requests Diagram

jfree.org

306 ms

www.jfree.org

513 ms

andreas08.css

101 ms

nb.png

295 ms

PieChart3DDemo1-170.png

299 ms

Our browser made a total of 6 requests to load all elements on the main page. We found that all of those requests were addressed to Jfree.org and no external sources were called. The less responsive or slowest element that took the longest time to load (513 ms) belongs to the original domain Jfree.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 10.6 kB (17%)

Content Size

62.3 kB

After Optimization

51.7 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Jfree.org main page is 62.3 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. Only 5% of websites need less resources to load. Images take 55.9 kB which makes up the majority of the site volume.

HTML Optimization

-63%

Potential reduce by 3.0 kB

  • Original 4.7 kB
  • After minification 4.7 kB
  • After compression 1.7 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 3.0 kB or 63% of the original size.

Image Optimization

-13%

Potential reduce by 7.2 kB

  • Original 55.9 kB
  • After minification 48.7 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. Obviously, Jfree needs image optimization as it can save up to 7.2 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-26%

Potential reduce by 441 B

  • Original 1.7 kB
  • After minification 1.7 kB
  • After compression 1.3 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. Jfree.org needs all CSS files to be minified and compressed as it can save up to 441 B or 26% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

4

After Optimization

4

  • Images
  • CSS

The browser has sent 4 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jfree. According to our analytics all requests are already optimized.

Network Requests Diagram

jfree.org

jfree.org

306 ms

www.jfree.org

www.jfree.org

513 ms

andreas08.css

andreas08.css

101 ms

nb.png

nb.png

295 ms

PieChart3DDemo1-170.png

PieChart3DDemo1-170.png

299 ms

jfree_1.jpg

jfree_1.jpg

293 ms

Accessibility Review

jfree.org accessibility score

83

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

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

jfree.org best practices score

75

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

Serves images with low resolution

SEO Factors

jfree.org SEO score

75

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jfree.org 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 Jfree.org main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

jfree.org

Open Graph description is not detected on the main page of Jfree. 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: