Tools & Wizards About Us
idaltonizer.com screenshot

Report Summary

  • 58

    Performance

    Renders faster than
    74% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

idaltonizer.com

iDaltonizer - colorblindness correction and simulation application for iPhone and iPad

Page Load Speed

4.1 sec in total

First Response

461 ms

Resources Loaded

2.5 sec

Page Rendered

1.2 sec

idaltonizer.com screenshot

About Website

Welcome to idaltonizer.com homepage info - get ready to check IDaltonizer best content right away, or after learning these important things about idaltonizer.com

iDaltonizer is an app for iPhone, iPad and iPod that helps colorblind people to see the world in a new way! Discover it!

Visit idaltonizer.com

Key Findings

We analyzed Idaltonizer.com page load time and found that the first response time was 461 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

idaltonizer.com performance score

58

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

26/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

21/100

25%

SI (Speed Index)

Value5.0 s

63/100

10%

TBT (Total Blocking Time)

Value400 ms

68/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value4.1 s

86/100

10%

Network Requests Diagram

idaltonizer.com

461 ms

www.idaltonizer.com

324 ms

styles.css

102 ms

jquery.fancybox-1.3.1.css

197 ms

jquery.js

304 ms

Our browser made a total of 52 requests to load all elements on the main page. We found that all of those requests were addressed to Idaltonizer.com and no external sources were called. The less responsive or slowest element that took the longest time to load (887 ms) belongs to the original domain Idaltonizer.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 138.5 kB (14%)

Content Size

1.0 MB

After Optimization

867.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Idaltonizer.com 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. 30% of websites need less resources to load. Images take 933.8 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 24.6 kB

  • Original 33.8 kB
  • After minification 30.4 kB
  • After compression 9.2 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 24.6 kB or 73% of the original size.

Image Optimization

-12%

Potential reduce by 111.9 kB

  • Original 933.8 kB
  • After minification 821.9 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, IDaltonizer needs image optimization as it can save up to 111.9 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-3%

Potential reduce by 976 B

  • Original 34.2 kB
  • After minification 34.2 kB
  • After compression 33.2 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

-24%

Potential reduce by 1.0 kB

  • Original 4.3 kB
  • After minification 4.3 kB
  • After compression 3.3 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. Idaltonizer.com needs all CSS files to be minified and compressed as it can save up to 1.0 kB or 24% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (30%)

Requests Now

50

After Optimization

35

  • Images
  • JavaScript
  • CSS

The browser has sent 50 CSS, Javascripts, AJAX and image requests in order to completely render the main page of IDaltonizer. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

idaltonizer.com

idaltonizer.com

461 ms

www.idaltonizer.com

www.idaltonizer.com

324 ms

styles.css

styles.css

102 ms

jquery.fancybox-1.3.1.css

jquery.fancybox-1.3.1.css

197 ms

jquery.js

jquery.js

304 ms

jquery.scroll.js

jquery.scroll.js

197 ms

jquery.serialScroll.js

jquery.serialScroll.js

208 ms

jquery.fancybox-1.3.1.pack.js

jquery.fancybox-1.3.1.pack.js

208 ms

jquery.tools.js

jquery.tools.js

199 ms

slickapp.js

slickapp.js

284 ms

light_shadow.gif

light_shadow.gif

100 ms

phone.jpg

phone.jpg

101 ms

price_badge.png

price_badge.png

102 ms

app_screenshot_ishihara.jpg

app_screenshot_ishihara.jpg

308 ms

appOfTheWeek.png

appOfTheWeek.png

302 ms

logo.jpg

logo.jpg

206 ms

flag_italy_text.png

flag_italy_text.png

157 ms

flag_ger_text.png

flag_ger_text.png

195 ms

flag_fra_text.png

flag_fra_text.png

198 ms

flag_esp_text.png

flag_esp_text.png

255 ms

flag_bra_text.png

flag_bra_text.png

294 ms

app_store.gif

app_store.gif

297 ms

bullet.gif

bullet.gif

306 ms

page_seperator.gif

page_seperator.gif

351 ms

horizontal_seperator.gif

horizontal_seperator.gif

388 ms

dark_shadow.gif

dark_shadow.gif

395 ms

feature_box-top.gif

feature_box-top.gif

389 ms

feature_1.jpg

feature_1.jpg

398 ms

enlarge.png

enlarge.png

398 ms

feature_box-bottom.gif

feature_box-bottom.gif

437 ms

feature_2.jpg

feature_2.jpg

473 ms

feature_3.jpg

feature_3.jpg

482 ms

vertical_seperator.gif

vertical_seperator.gif

491 ms

quotes.gif

quotes.gif

497 ms

PDT_2.png

PDT_2.png

498 ms

screenshot_9.jpg

screenshot_9.jpg

723 ms

screenshot_2.jpg

screenshot_2.jpg

665 ms

dario_img.jpeg

dario_img.jpeg

579 ms

team_member.jpg

team_member.jpg

589 ms

screenshot_1.jpg

screenshot_1.jpg

698 ms

screenshot_3.jpg

screenshot_3.jpg

696 ms

screenshot_4.jpg

screenshot_4.jpg

874 ms

screenshot_6.jpg

screenshot_6.jpg

689 ms

screenshot_7.jpg

screenshot_7.jpg

760 ms

screenshot_8.jpg

screenshot_8.jpg

790 ms

screenshot_5.jpg

screenshot_5.jpg

887 ms

text_field.gif

text_field.gif

759 ms

send.gif

send.gif

739 ms

mail_icon.gif

mail_icon.gif

778 ms

logo_footer.jpg

logo_footer.jpg

756 ms

social_icons.gif

social_icons.gif

725 ms

app_store_small.gif

app_store_small.gif

738 ms

Accessibility Review

idaltonizer.com accessibility score

65

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.

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

idaltonizer.com best practices score

58

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

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

idaltonizer.com SEO score

62

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

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 Idaltonizer.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 Idaltonizer.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

idaltonizer.com

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