Report Summary

  • 52

    Performance

    Renders faster than
    70% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 85

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

heizen.vn

Heizen – Đèn sưởi cao cấp nhất thị trường

Page Load Speed

12.4 sec in total

First Response

2.6 sec

Resources Loaded

9.3 sec

Page Rendered

573 ms

heizen.vn screenshot

About Website

Welcome to heizen.vn homepage info - get ready to check Heizen best content for Vietnam right away, or after learning these important things about heizen.vn

Đèn sưởi nhà tắm Heizen TỐT NHẤT cho người già, bà bầu và trẻ nhỏ là dòng đèn sưởi cao cấp sử dụng công nghệ hồng ngoại, không đốt cháy Oxy, Bảo hành 10 năm

Visit heizen.vn

Key Findings

We analyzed Heizen.vn page load time and found that the first response time was 2.6 sec and then it took 9.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

heizen.vn performance score

52

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.6 s

2/100

10%

LCP (Largest Contentful Paint)

Value7.0 s

6/100

25%

SI (Speed Index)

Value12.1 s

4/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value7.3 s

50/100

10%

Network Requests Diagram

heizen.vn

2588 ms

wp-emoji-release.min.js

504 ms

sweetalert.css

507 ms

nivoslider.css

514 ms

jcarousel.css

517 ms

Our browser made a total of 112 requests to load all elements on the main page. We found that 66% of them (74 requests) were addressed to the original Heizen.vn, 9% (10 requests) were made to Satoristudio.net and 4% (4 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (5 sec) belongs to the original domain Heizen.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.2 MB (38%)

Content Size

5.8 MB

After Optimization

3.6 MB

In fact, the total size of Heizen.vn main page is 5.8 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. 65% of websites need less resources to load. Images take 4.1 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 70.1 kB

  • Original 87.3 kB
  • After minification 83.4 kB
  • After compression 17.2 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 70.1 kB or 80% of the original size.

Image Optimization

-23%

Potential reduce by 940.8 kB

  • Original 4.1 MB
  • After minification 3.2 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. Obviously, Heizen needs image optimization as it can save up to 940.8 kB or 23% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-72%

Potential reduce by 848.6 kB

  • Original 1.2 MB
  • After minification 1.1 MB
  • After compression 331.5 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 848.6 kB or 72% of the original size.

CSS Optimization

-83%

Potential reduce by 358.4 kB

  • Original 429.3 kB
  • After minification 400.0 kB
  • After compression 70.9 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. Heizen.vn needs all CSS files to be minified and compressed as it can save up to 358.4 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 56 (54%)

Requests Now

103

After Optimization

47

The browser has sent 103 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Heizen. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 37 to 1 for JavaScripts and from 21 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

heizen.vn accessibility score

84

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

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

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

heizen.vn best practices score

85

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

heizen.vn SEO score

85

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

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

    VI

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Heizen.vn can be misinterpreted by Google and other search engines. Our service has detected that Vietnamese is used on the page, and it does not match the claimed English language. Our system also found out that Heizen.vn 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 Heizen. 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: