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zalo.vn screenshot

Report Summary

  • 0

    Performance

  • 0

    Accessibility

  • 0

    Best Practices

  • 0

    SEO

zalo.vn

Zalo PC - Tải Zalo PC để làm việc nhóm hiệu quả và gửi file nhanh

Page Load Speed

7.4 sec in total

First Response

1.1 sec

Resources Loaded

6.1 sec

Page Rendered

131 ms

zalo.vn screenshot

About Website

Visit zalo.vn now to see the best up-to-date Zalo content for Vietnam and also check out these interesting facts you probably never knew about zalo.vn

Tải Zalo PC cho máy tính để sử dụng các tính năng vượt trội như gửi file 1GB, Chụp màn hình, Phân loại nhóm,... Download Zalo trên các nền tảng Windows, Mac OS

Visit zalo.vn

Key Findings

We analyzed Zalo.vn page load time and found that the first response time was 1.1 sec and then it took 6.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

zalo.vn performance score

0

Network Requests Diagram

zalo.vn

1138 ms

pc

280 ms

layout.css

1823 ms

custom.css

1346 ms

jquery.min.js

1621 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 4% of them (1 request) were addressed to the original Zalo.vn, 68% (19 requests) were made to Stc-zaloprofile.zdn.vn and 7% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Stc-zaloprofile.zdn.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 128.4 kB (13%)

Content Size

1.0 MB

After Optimization

884.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zalo.vn 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. 40% of websites need less resources to load. Images take 808.1 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 12.2 kB

  • Original 16.4 kB
  • After minification 14.4 kB
  • After compression 4.1 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 2.0 kB, which is 12% 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 12.2 kB or 75% of the original size.

Image Optimization

-9%

Potential reduce by 68.9 kB

  • Original 808.1 kB
  • After minification 739.2 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. Zalo images are well optimized though.

JavaScript Optimization

-19%

Potential reduce by 24.7 kB

  • Original 127.7 kB
  • After minification 125.9 kB
  • After compression 102.9 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 24.7 kB or 19% of the original size.

CSS Optimization

-37%

Potential reduce by 22.5 kB

  • Original 60.6 kB
  • After minification 60.1 kB
  • After compression 38.1 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. Zalo.vn needs all CSS files to be minified and compressed as it can save up to 22.5 kB or 37% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (45%)

Requests Now

22

After Optimization

12

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zalo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

zalo.vn

zalo.vn

1138 ms

pc

pc

280 ms

layout.css

layout.css

1823 ms

custom.css

custom.css

1346 ms

jquery.min.js

jquery.min.js

1621 ms

session-sdk.min.js

session-sdk.min.js

1603 ms

tether.min.js

tether.min.js

1353 ms

pgwbrowser.min.js

pgwbrowser.min.js

1353 ms

bootstrap.min.js

bootstrap.min.js

1619 ms

swiper.min.js

swiper.min.js

1928 ms

main.js

main.js

1609 ms

conversion.js

conversion.js

1607 ms

za.js

za.js

1357 ms

sdk.js

sdk.js

1577 ms

img_btn_top.png

img_btn_top.png

259 ms

logo.svg

logo.svg

264 ms

ico_check.png

ico_check.png

257 ms

img_pc.png

img_pc.png

1564 ms

roboto-regular-webfont.woff

roboto-regular-webfont.woff

509 ms

roboto-medium-webfont.woff

roboto-medium-webfont.woff

1025 ms

roboto-light-webfont.woff

roboto-light-webfont.woff

706 ms

roboto-bold-webfont.woff

roboto-bold-webfont.woff

972 ms

btn_download.png

btn_download.png

465 ms

world.png

world.png

726 ms

analytics.js

analytics.js

54 ms

collect

collect

13 ms

collect

collect

33 ms

ga-audiences

ga-audiences

33 ms

SEO Factors

zalo.vn SEO score

0

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 Zalo.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 Zalo.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

zalo.vn

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