Tools & Wizards About Us
pdfviewer.io screenshot

Report Summary

  • 46

    Performance

    Renders faster than
    66% of other websites

  • 54

    Accessibility

    Visual factors better than
    that of 22% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

pdfviewer.io

PDF Viewer for iPad, iPhone, Mac, and Android - Reading, Reviewing, Annotating - Made Easy.

Page Load Speed

1.8 sec in total

First Response

85 ms

Resources Loaded

1.1 sec

Page Rendered

576 ms

pdfviewer.io screenshot

About Website

Click here to check amazing PDF Viewer content for India. Otherwise, check out these important facts you probably never knew about pdfviewer.io

Whether you’re working alone or collaborating with a team, our PDF Viewer maximizes productivity, allowing you to easily read, review, annotate, and search PDFs on your mobile device.

Visit pdfviewer.io

Key Findings

We analyzed Pdfviewer.io page load time and found that the first response time was 85 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

pdfviewer.io performance score

46

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

54/100

10%

LCP (Largest Contentful Paint)

Value3.4 s

66/100

25%

SI (Speed Index)

Value3.8 s

84/100

10%

TBT (Total Blocking Time)

Value8,720 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value13.6 s

11/100

10%

Network Requests Diagram

pdfviewer.io

85 ms

pdfviewer.io

93 ms

twitter-dfb3f0e2.png

13 ms

facebook-9b3bba29.png

30 ms

app-icon-ios-52a2408a.png

37 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 60% of them (34 requests) were addressed to the original Pdfviewer.io, 21% (12 requests) were made to and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (332 ms) relates to the external source In.getclicky.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 378.0 kB (13%)

Content Size

3.0 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Pdfviewer.io main page is 3.0 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. 45% of websites need less resources to load. Images take 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 248.9 kB

  • Original 287.7 kB
  • After minification 287.6 kB
  • After compression 38.8 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 248.9 kB or 87% of the original size.

Image Optimization

-5%

Potential reduce by 126.1 kB

  • Original 2.7 MB
  • After minification 2.5 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. PDF Viewer images are well optimized though.

JavaScript Optimization

-12%

Potential reduce by 3.0 kB

  • Original 25.8 kB
  • After minification 25.4 kB
  • After compression 22.7 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 3.0 kB or 12% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (28%)

Requests Now

40

After Optimization

29

  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of PDF Viewer. 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 as a result speed up the page load time.

Network Requests Diagram

pdfviewer.io

pdfviewer.io

85 ms

pdfviewer.io

pdfviewer.io

93 ms

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13 ms

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30 ms

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37 ms

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37 ms

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41 ms

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41 ms

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43 ms

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50 ms

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50 ms

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57 ms

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55 ms

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80 ms

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86 ms

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80 ms

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79 ms

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90 ms

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95 ms

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104 ms

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104 ms

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101 ms

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104 ms

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103 ms

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108 ms

fonts.css

fonts.css

241 ms

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application-d318512a.css

109 ms

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application-f529ea92.js

125 ms

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124 ms

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125 ms

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125 ms

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126 ms

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126 ms

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88 ms

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87 ms

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17 ms

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16 ms

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15 ms

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14 ms

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13 ms

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12 ms

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analytics.js

analytics.js

24 ms

js

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39 ms

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collect

10 ms

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collect

46 ms

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40 ms

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39 ms

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10 ms

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in.php

332 ms

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15 ms

Accessibility Review

pdfviewer.io accessibility score

54

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

pdfviewer.io best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

pdfviewer.io SEO score

92

Search Engine Optimization Advices

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

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Pdfviewer.io can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Pdfviewer.io 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

pdfviewer.io

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