Tools & Wizards About Us
pdf.vn screenshot

Report Summary

  • 10

    Performance

    Renders faster than
    23% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 91% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 99

    SEO

    Google-friendlier than
    93% of websites

pdf.vn

PDF - Phần mềm đọc file PDF, Chuyển PDF sang Word, chuyển Word sang PDF

Page Load Speed

6.1 sec in total

First Response

540 ms

Resources Loaded

5.1 sec

Page Rendered

429 ms

pdf.vn screenshot

About Website

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

PDF - Phần mềm đọc file PDF, chuyển PDF sang Word, chuyển Word sang PDF, chuyển tài liệu scan sang Word

Visit pdf.vn

Key Findings

We analyzed Pdf.vn page load time and found that the first response time was 540 ms and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

pdf.vn performance score

10

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value10.2 s

9/100

10%

TBT (Total Blocking Time)

Value2,900 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.513

15/100

15%

TTI (Time to Interactive)

Value16.0 s

6/100

10%

Network Requests Diagram

pdf.vn

540 ms

pdf.vn

1353 ms

bootstrap.min.css

1065 ms

style.min.css

1041 ms

jquery.min.js

19 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 88% of them (37 requests) were addressed to the original Pdf.vn, 5% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Pdf.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 586.6 kB (24%)

Content Size

2.5 MB

After Optimization

1.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Pdf.vn main page is 2.5 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 2.2 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 33.0 kB

  • Original 39.6 kB
  • After minification 37.2 kB
  • After compression 6.5 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 33.0 kB or 83% of the original size.

Image Optimization

-20%

Potential reduce by 424.5 kB

  • Original 2.2 MB
  • After minification 1.7 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, PDF needs image optimization as it can save up to 424.5 kB or 20% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-10%

Potential reduce by 14.8 kB

  • Original 142.9 kB
  • After minification 140.2 kB
  • After compression 128.0 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

-83%

Potential reduce by 114.2 kB

  • Original 137.9 kB
  • After minification 137.4 kB
  • After compression 23.7 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. Pdf.vn needs all CSS files to be minified and compressed as it can save up to 114.2 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (13%)

Requests Now

39

After Optimization

34

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of PDF. 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

pdf.vn

pdf.vn

540 ms

pdf.vn

pdf.vn

1353 ms

bootstrap.min.css

bootstrap.min.css

1065 ms

style.min.css

style.min.css

1041 ms

jquery.min.js

jquery.min.js

19 ms

modernizr.min.js

modernizr.min.js

1056 ms

customscript.js

customscript.js

1138 ms

adsbygoogle.js

adsbygoogle.js

65 ms

logo.png

logo.png

267 ms

cach-unlock-mo-khoa-file-pdf-de-in-an-chinh-sua_094814350.jpg

cach-unlock-mo-khoa-file-pdf-de-in-an-chinh-sua_094814350.jpg

861 ms

pdf-rotator_013537172.png

pdf-rotator_013537172.png

847 ms

pdfelement_013717913.png

pdfelement_013717913.png

526 ms

cach-be-khoa-pdf-cuc-nhanh-va-de-dang_030251253.png

cach-be-khoa-pdf-cuc-nhanh-va-de-dang_030251253.png

774 ms

tu-ho-so-tmhs24-ben-bi-giau-tham-my-phu-hop-voi-moi-van-phon_020936578.jpg

tu-ho-so-tmhs24-ben-bi-giau-tham-my-phu-hop-voi-moi-van-phon_020936578.jpg

538 ms

cach-chuyen-anh-sang-pdf-tren-dien-thoai-cuc-nhanh_034047186.png

cach-chuyen-anh-sang-pdf-tren-dien-thoai-cuc-nhanh_034047186.png

1054 ms

file-giay-ke-ngang-pdf-de-in_015527797.jpg

file-giay-ke-ngang-pdf-de-in_015527797.jpg

805 ms

tong-quan-ve-camera-iphone-15_083602701.png

tong-quan-ve-camera-iphone-15_083602701.png

1804 ms

cach-tao-file-pdf-tren-dien-thoai-de-dang_041048441.png

cach-tao-file-pdf-tren-dien-thoai-de-dang_041048441.png

1579 ms

cach-xoa-trang-trang-trong-pdf-nhanh-va-don-gian_044419273.png

cach-xoa-trang-trang-trong-pdf-nhanh-va-don-gian_044419273.png

1089 ms

techlade-vn-co-phai-trang-tin-dien-tu-uy-tin-bac-nhat-hien-n_033551734.jpg

techlade-vn-co-phai-trang-tin-dien-tu-uy-tin-bac-nhat-hien-n_033551734.jpg

1131 ms

cach-chen-them-trang-vao-pdf-cuc-nhanh-va-don-gian_014547119.png

cach-chen-them-trang-vao-pdf-cuc-nhanh-va-don-gian_014547119.png

1437 ms

mo-control-panel_051727532.png

mo-control-panel_051727532.png

1594 ms

word-to-pdf_081027.jpg

word-to-pdf_081027.jpg

1356 ms

pdf-to-word-online_123727.jpg

pdf-to-word-online_123727.jpg

1414 ms

2-phan-mem-mien-phi-chuyen-doi-pdf-sang-word-tot-nhat_111540.png

2-phan-mem-mien-phi-chuyen-doi-pdf-sang-word-tot-nhat_111540.png

1622 ms

chuyen-file-pdf-sang-word-online-khong-bi-loi-font-nhanh-nha_053520.jpg

chuyen-file-pdf-sang-word-online-khong-bi-loi-font-nhanh-nha_053520.jpg

1698 ms

pdf-to-word_034148.jpg

pdf-to-word_034148.jpg

1723 ms

pdf-to-excel_111858.png

pdf-to-excel_111858.png

1841 ms

page-cutter_014241.jpg

page-cutter_014241.jpg

1856 ms

jpg-to-pdf_043928.jpg

jpg-to-pdf_043928.jpg

1888 ms

adobe-reader_040136.jpg

adobe-reader_040136.jpg

1981 ms

cutepdf-writer_095522.jpg

cutepdf-writer_095522.jpg

2295 ms

cach-khoa-file-pdf-bao-mat-file-pdf-chong-copy-chong-chinh-s_091223272.jpg

cach-khoa-file-pdf-bao-mat-file-pdf-chong-copy-chong-chinh-s_091223272.jpg

2062 ms

huong-dan-cat-file-pdf-online_100138.jpg

huong-dan-cat-file-pdf-online_100138.jpg

2103 ms

cach-giam-dung-luong-file-pdf-hieu-qua-nhat_033743677.jpg

cach-giam-dung-luong-file-pdf-hieu-qua-nhat_033743677.jpg

2119 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

2080 ms

social-facebook.png

social-facebook.png

2158 ms

social-googleplus.png

social-googleplus.png

2216 ms

social-twitter.png

social-twitter.png

2260 ms

analytics.js

analytics.js

21 ms

collect

collect

12 ms

js

js

67 ms

Accessibility Review

pdf.vn accessibility score

97

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.

Best Practices

pdf.vn best practices score

67

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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

pdf.vn SEO score

99

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

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 Pdf.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 Pdf.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

pdf.vn

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