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sim123.vn screenshot

Report Summary

  • 91

    Performance

    Renders faster than
    91% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

sim123.vn

Trang chủ

Page Load Speed

5 sec in total

First Response

743 ms

Resources Loaded

3.7 sec

Page Rendered

547 ms

sim123.vn screenshot

About Website

Click here to check amazing Sim 123 content for Vietnam. Otherwise, check out these important facts you probably never knew about sim123.vn

Với hơn 10 năm kinh nghiệm trong lĩnh vực sim số đẹp giá rẻ, chúng tôi cung cấp sim số đẹp của các nhà mạng vinaphone, viettel, mobifone, gmobile... với Giá Gốc

Visit sim123.vn

Key Findings

We analyzed Sim123.vn page load time and found that the first response time was 743 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

sim123.vn performance score

91

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

62/100

10%

LCP (Largest Contentful Paint)

Value2.6 s

87/100

25%

SI (Speed Index)

Value3.8 s

83/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.015

100/100

15%

TTI (Time to Interactive)

Value3.4 s

93/100

10%

Network Requests Diagram

sim123.vn

743 ms

sim123.vn

1049 ms

style.css

252 ms

jquery-3.3.1.min.js

32 ms

js

40 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that 70% of them (23 requests) were addressed to the original Sim123.vn, 6% (2 requests) were made to Connect.facebook.net and 6% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Sim123.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 75.1 kB (46%)

Content Size

163.7 kB

After Optimization

88.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sim123.vn main page is 163.7 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. 20% of websites need less resources to load. HTML takes 55.7 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 47.3 kB

  • Original 55.7 kB
  • After minification 55.4 kB
  • After compression 8.4 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 47.3 kB or 85% of the original size.

Image Optimization

-2%

Potential reduce by 1.4 kB

  • Original 54.3 kB
  • After minification 53.0 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. Sim 123 images are well optimized though.

JavaScript Optimization

-10%

Potential reduce by 2.4 kB

  • Original 24.3 kB
  • After minification 23.4 kB
  • After compression 21.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-82%

Potential reduce by 24.0 kB

  • Original 29.3 kB
  • After minification 21.2 kB
  • After compression 5.3 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. Sim123.vn needs all CSS files to be minified and compressed as it can save up to 24.0 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (47%)

Requests Now

30

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sim 123. 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

sim123.vn

sim123.vn

743 ms

sim123.vn

sim123.vn

1049 ms

style.css

style.css

252 ms

jquery-3.3.1.min.js

jquery-3.3.1.min.js

32 ms

js

js

40 ms

app.js

app.js

522 ms

OXCrxto.gif

OXCrxto.gif

143 ms

header-out.png

header-out.png

376 ms

logo-min.png

logo-min.png

414 ms

top-banner-min.png

top-banner-min.png

613 ms

menu-small.png

menu-small.png

663 ms

icon-search.png

icon-search.png

799 ms

icon-li-ns.png

icon-li-ns.png

847 ms

nhamang-min.png

nhamang-min.png

864 ms

li-a-simcard.png

li-a-simcard.png

849 ms

thu_mua_sim_tai_ha_noi.jpg

thu_mua_sim_tai_ha_noi.jpg

876 ms

sim_dau_094_gia_re.jpg

sim_dau_094_gia_re.jpg

912 ms

sim_mobifone.jpg

sim_mobifone.jpg

1031 ms

thu_mua_sim_so_dep.jpg

thu_mua_sim_so_dep.jpg

1093 ms

noimg.jpg

noimg.jpg

1324 ms

sec_20_img_01.png

sec_20_img_01.png

1116 ms

sec_20_img_02.png

sec_20_img_02.png

1134 ms

sec_20_img_03.png

sec_20_img_03.png

1161 ms

icon-phone-w.png

icon-phone-w.png

1263 ms

icon-chat-w.png

icon-chat-w.png

1341 ms

fbevents.js

fbevents.js

82 ms

analytics.js

analytics.js

42 ms

collect

collect

18 ms

863958610319446

863958610319446

54 ms

ga-audiences

ga-audiences

49 ms

23 ms

3 ms

responsive.css

responsive.css

251 ms

Accessibility Review

sim123.vn accessibility score

74

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

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

sim123.vn 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

SEO Factors

sim123.vn SEO score

83

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

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    VI

  • Language Claimed

    VI

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sim123.vn can be misinterpreted by Google and other search engines. Our service has detected that Vietnamese is used on the page, and it matches the claimed language. Our system also found out that Sim123.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

sim123.vn

Open Graph data is detected on the main page of Sim 123. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: