Tools & Wizards About Us
tech12h.com screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    47% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 92% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

tech12h.com

Tài liệu học online, giải bài tập sgk hay nhất

Page Load Speed

11.3 sec in total

First Response

3.8 sec

Resources Loaded

7.1 sec

Page Rendered

325 ms

tech12h.com screenshot

About Website

Welcome to tech12h.com homepage info - get ready to check Tech 12 H best content for Vietnam right away, or after learning these important things about tech12h.com

Hướng dẫn giải bài tập SGK, tổng hợp những đề thi mẫu giúp học sinh học và thi tốt hơn. Cùng với những kiến thức tin học hữu ích

Visit tech12h.com

Key Findings

We analyzed Tech12h.com page load time and found that the first response time was 3.8 sec and then it took 7.4 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

tech12h.com performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.2 s

1/100

10%

LCP (Largest Contentful Paint)

Value7.2 s

5/100

25%

SI (Speed Index)

Value10.2 s

8/100

10%

TBT (Total Blocking Time)

Value1,110 ms

23/100

30%

CLS (Cumulative Layout Shift)

Value0.013

100/100

15%

TTI (Time to Interactive)

Value9.9 s

27/100

10%

Network Requests Diagram

www.tech12h.com

3843 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

258 ms

css_NdVgz6YKifxQUEsW5xls_zI7Pn2F7E5U5Wb29zcu3vo.css

479 ms

css_iDSmQJYZ1FVXnB3Nhg-I3X6yiLJ7kQvOCm0r9XdB89k.css

726 ms

css_MyEDvSFVeDchi5Fvnr3QChWUvi4IlyDuPbakx9aJ4Bs.css

499 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 81% of them (25 requests) were addressed to the original Tech12h.com, 6% (2 requests) were made to Google-analytics.com and 6% (2 requests) were made to Staticxx.facebook.com. The less responsive or slowest element that took the longest time to load (3.8 sec) belongs to the original domain Tech12h.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 377.8 kB (45%)

Content Size

847.0 kB

After Optimization

469.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Tech12h.com main page is 847.0 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. 35% of websites need less resources to load. Images take 425.0 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 42.6 kB

  • Original 52.3 kB
  • After minification 48.9 kB
  • After compression 9.6 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 42.6 kB or 82% of the original size.

Image Optimization

-14%

Potential reduce by 57.9 kB

  • Original 425.0 kB
  • After minification 367.2 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. Obviously, Tech 12 H needs image optimization as it can save up to 57.9 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-67%

Potential reduce by 117.1 kB

  • Original 175.5 kB
  • After minification 159.4 kB
  • After compression 58.5 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 117.1 kB or 67% of the original size.

CSS Optimization

-83%

Potential reduce by 160.2 kB

  • Original 194.2 kB
  • After minification 189.8 kB
  • After compression 34.0 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. Tech12h.com needs all CSS files to be minified and compressed as it can save up to 160.2 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (37%)

Requests Now

30

After Optimization

19

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tech 12 H. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.tech12h.com

www.tech12h.com

3843 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

258 ms

css_NdVgz6YKifxQUEsW5xls_zI7Pn2F7E5U5Wb29zcu3vo.css

css_NdVgz6YKifxQUEsW5xls_zI7Pn2F7E5U5Wb29zcu3vo.css

479 ms

css_iDSmQJYZ1FVXnB3Nhg-I3X6yiLJ7kQvOCm0r9XdB89k.css

css_iDSmQJYZ1FVXnB3Nhg-I3X6yiLJ7kQvOCm0r9XdB89k.css

726 ms

css_MyEDvSFVeDchi5Fvnr3QChWUvi4IlyDuPbakx9aJ4Bs.css

css_MyEDvSFVeDchi5Fvnr3QChWUvi4IlyDuPbakx9aJ4Bs.css

499 ms

css_6j_kM_lFBpjKiiMCcWiOeu7BL5nIp-9slDeauzjyeCM.css

css_6j_kM_lFBpjKiiMCcWiOeu7BL5nIp-9slDeauzjyeCM.css

507 ms

js_xAPl0qIk9eowy_iS9tNkCWXLUVoat94SQT48UBCFkyQ.js

js_xAPl0qIk9eowy_iS9tNkCWXLUVoat94SQT48UBCFkyQ.js

774 ms

js_wMq06n34El81cPtKvKVuAehyOEwepE71d1W2gGcEjDE.js

js_wMq06n34El81cPtKvKVuAehyOEwepE71d1W2gGcEjDE.js

519 ms

js_Q1CQiv6dzAe42smgbn7CVbYEpweXUfTFPMKBaDgFeH8.js

js_Q1CQiv6dzAe42smgbn7CVbYEpweXUfTFPMKBaDgFeH8.js

714 ms

js_8OJe3OJavD8V9XcbWzBkHgoeMAiCZYci0FiD3XTkdO0.js

js_8OJe3OJavD8V9XcbWzBkHgoeMAiCZYci0FiD3XTkdO0.js

746 ms

js_ia6o7Wszzk5bqie72CjLtQh-VllZOrffGV70yr1trog.js

js_ia6o7Wszzk5bqie72CjLtQh-VllZOrffGV70yr1trog.js

759 ms

sdk.js

sdk.js

59 ms

analytics.js

analytics.js

57 ms

cooltext132324690978031_0.png

cooltext132324690978031_0.png

254 ms

images_7.jpg

images_7.jpg

251 ms

tkweb.png

tkweb.png

777 ms

thiet-ke-website-tai-nam-dinh.jpg

thiet-ke-website-tai-nam-dinh.jpg

521 ms

dinhkem.png

dinhkem.png

484 ms

fff_0.png

fff_0.png

716 ms

chuan_0.png

chuan_0.png

1246 ms

screenshot_2016-03-13-10-03-02.png

screenshot_2016-03-13-10-03-02.png

1012 ms

viber.jpg

viber.jpg

725 ms

3333532_web-browsers.jpg

3333532_web-browsers.jpg

779 ms

bluedot.jpg

bluedot.jpg

954 ms

dd.png

dd.png

1209 ms

diendanbaclieu-112461-download-desktopicontoy.jpg

diendanbaclieu-112461-download-desktopicontoy.jpg

1035 ms

collect

collect

28 ms

76 ms

xd_arbiter.php

xd_arbiter.php

45 ms

xd_arbiter.php

xd_arbiter.php

56 ms

css_2THG1eGiBIizsWFeexsNe1iDifJ00QRS9uSd03rY9co.css

css_2THG1eGiBIizsWFeexsNe1iDifJ00QRS9uSd03rY9co.css

255 ms

Accessibility Review

tech12h.com accessibility score

97

Accessibility Issues

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

tech12h.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

SEO Factors

tech12h.com SEO score

100

Search Engine Optimization Advices

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 Tech12h.com 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 Tech12h.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

tech12h.com

Open Graph data is detected on the main page of Tech 12 H. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: