Tools & Wizards About Us

Report Summary

  • 59

    Performance

    Renders faster than
    74% of other websites

  • 62

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

szdoorbell.com

Door Bells, Door Chimes, China Doorbell Manufactory - Forrinx_Forrinx

Page Load Speed

4.8 sec in total

First Response

676 ms

Resources Loaded

4 sec

Page Rendered

109 ms

About Website

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

Shenzhen Forrinx Electronics Co., Ltd.,focus on long-range doorbell, wireless items like mp3 wireless doorbell,and customized design for OEM&ODM

Visit szdoorbell.com

Key Findings

We analyzed Szdoorbell.com page load time and found that the first response time was 676 ms and then it took 4.1 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

szdoorbell.com performance score

59

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value6.5 s

9/100

25%

SI (Speed Index)

Value7.6 s

26/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value4.6 s

82/100

10%

Network Requests Diagram

szdoorbell.com

676 ms

www.szdoorbell.com

668 ms

style.css

431 ms

jquery-1.8.2.min.js

849 ms

bootstrap.min.css

1072 ms

Our browser made a total of 16 requests to load all elements on the main page. We found that 88% of them (14 requests) were addressed to the original Szdoorbell.com, 13% (2 requests) were made to Cdn.bootcss.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Szdoorbell.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 235.8 kB (15%)

Content Size

1.6 MB

After Optimization

1.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Szdoorbell.com main page is 1.6 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 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 3.3 kB

  • Original 4.5 kB
  • After minification 4.0 kB
  • After compression 1.3 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. This page needs HTML code to be minified as it can gain 576 B, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 3.3 kB or 72% of the original size.

Image Optimization

-1%

Potential reduce by 17.7 kB

  • Original 1.3 MB
  • After minification 1.3 MB

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. Sz Doorbell images are well optimized though.

JavaScript Optimization

-59%

Potential reduce by 61.4 kB

  • Original 104.7 kB
  • After minification 104.7 kB
  • After compression 43.4 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 61.4 kB or 59% of the original size.

CSS Optimization

-84%

Potential reduce by 153.4 kB

  • Original 183.2 kB
  • After minification 178.3 kB
  • After compression 29.9 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. Szdoorbell.com needs all CSS files to be minified and compressed as it can save up to 153.4 kB or 84% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

13

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sz Doorbell. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

szdoorbell.com accessibility score

62

Accessibility Issues

ARIA

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.

Impact

Issue

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

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

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

szdoorbell.com best practices score

75

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

Page has valid source maps

SEO Factors

szdoorbell.com SEO score

69

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

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Szdoorbell.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Szdoorbell.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 description is not detected on the main page of Sz Doorbell. 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: