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deltathree.com screenshot

Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

deltathree.com

Deltathree VoIP Provider - PC to Phone, Mobile dialers, Broadband , Video Phones and more.

Page Load Speed

1.7 sec in total

First Response

262 ms

Resources Loaded

1.3 sec

Page Rendered

84 ms

deltathree.com screenshot

About Website

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

deltathree offers a wide range of VoIP services including PC to phone, Internet Telephony VoIP service and more

Visit deltathree.com

Key Findings

We analyzed Deltathree.com page load time and found that the first response time was 262 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

deltathree.com performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.5 s

96/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

27/100

25%

SI (Speed Index)

Value3.0 s

94/100

10%

TBT (Total Blocking Time)

Value380 ms

70/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.7 s

80/100

10%

Network Requests Diagram

deltathree.com

262 ms

deltathree.com

270 ms

reset.css

18 ms

layout.css

24 ms

style.css

253 ms

Our browser made a total of 36 requests to load all elements on the main page. We found that 89% of them (32 requests) were addressed to the original Deltathree.com, 6% (2 requests) were made to Ssl.google-analytics.com and 3% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (390 ms) belongs to the original domain Deltathree.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 17.8 kB (6%)

Content Size

292.1 kB

After Optimization

274.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Deltathree.com main page is 292.1 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 10% of websites need less resources to load. Images take 167.3 kB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 11.7 kB

  • Original 17.8 kB
  • After minification 17.3 kB
  • After compression 6.0 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 11.7 kB or 66% of the original size.

Image Optimization

-3%

Potential reduce by 4.2 kB

  • Original 167.3 kB
  • After minification 163.0 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. Deltathree images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 888 B

  • Original 103.4 kB
  • After minification 103.4 kB
  • After compression 102.5 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

-25%

Potential reduce by 907 B

  • Original 3.7 kB
  • After minification 3.7 kB
  • After compression 2.8 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. Deltathree.com needs all CSS files to be minified and compressed as it can save up to 907 B or 25% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (36%)

Requests Now

25

After Optimization

16

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Deltathree. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

deltathree.com

deltathree.com

262 ms

deltathree.com

deltathree.com

270 ms

reset.css

reset.css

18 ms

layout.css

layout.css

24 ms

style.css

style.css

253 ms

prettyPhoto.css

prettyPhoto.css

222 ms

jquery.min.js

jquery.min.js

23 ms

jquery-ui.min.js

jquery-ui.min.js

23 ms

cufon-yui.js

cufon-yui.js

44 ms

cufon-replace.js

cufon-replace.js

225 ms

Myriad_Pro_600.font.js

Myriad_Pro_600.font.js

29 ms

Myriad_Pro_700.font.js

Myriad_Pro_700.font.js

36 ms

Myriad_Pro_Cond_700.font.js

Myriad_Pro_Cond_700.font.js

45 ms

jquery.scrollTo.js

jquery.scrollTo.js

259 ms

jquery.prettyPhoto.js

jquery.prettyPhoto.js

270 ms

forIframe.js

forIframe.js

59 ms

d3c.js

d3c.js

71 ms

home.jpg

home.jpg

89 ms

marker_2_w.gif

marker_2_w.gif

104 ms

deltathree.com

deltathree.com

91 ms

deltathree.com

deltathree.com

230 ms

deltathree.com

deltathree.com

232 ms

logo-PNG.png

logo-PNG.png

227 ms

menu_bg.gif

menu_bg.gif

225 ms

menu_line.gif

menu_line.gif

234 ms

ul-bgr.jpg

ul-bgr.jpg

206 ms

marker_banner.png

marker_banner.png

377 ms

marker_1.gif

marker_1.gif

390 ms

ga.js

ga.js

17 ms

deltathree.com

deltathree.com

244 ms

__utm.gif

__utm.gif

12 ms

deltathree.com

deltathree.com

90 ms

deltathree.com

deltathree.com

232 ms

deltathree.com

deltathree.com

225 ms

deltathree.com

deltathree.com

86 ms

deltathree.com

deltathree.com

92 ms

Accessibility Review

deltathree.com accessibility score

90

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

Best Practices

deltathree.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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

deltathree.com SEO score

54

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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 Deltathree.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 Deltathree.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

deltathree.com

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