Tools & Wizards About Us

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

secure.paperbackswap.com

Trade Used Books with PaperBack Swap (the world's largest Book Club)

Page Load Speed

21 sec in total

First Response

225 ms

Resources Loaded

20.4 sec

Page Rendered

426 ms

About Website

Click here to check amazing Secure Paper Back Swap content for United States. Otherwise, check out these important facts you probably never knew about secure.paperbackswap.com

Trade in your books via the largest online book swapping community in the world. Then choose from over 5 million available hardbacks, audiobooks, textbooks, romance novels and more. List your books to...

Visit secure.paperbackswap.com

Key Findings

We analyzed Secure.paperbackswap.com page load time and found that the first response time was 225 ms and then it took 20.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 9 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

secure.paperbackswap.com performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

19/100

10%

LCP (Largest Contentful Paint)

Value4.4 s

39/100

25%

SI (Speed Index)

Value12.6 s

3/100

10%

TBT (Total Blocking Time)

Value5,130 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.406

24/100

15%

TTI (Time to Interactive)

Value23.7 s

1/100

10%

Network Requests Diagram

secure.paperbackswap.com

225 ms

index.php

285 ms

global.css

89 ms

global.css

94 ms

jquery-3.5.1.js

24 ms

Our browser made a total of 128 requests to load all elements on the main page. We found that 27% of them (35 requests) were addressed to the original Secure.paperbackswap.com, 13% (16 requests) were made to Nationalbookswap.com and 9% (11 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (19.5 sec) relates to the external source Ir-na.amazon-adsystem.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 411.5 kB (24%)

Content Size

1.7 MB

After Optimization

1.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Secure.paperbackswap.com main page is 1.7 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. 65% of websites need less resources to load. Images take 912.5 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 118.5 kB

  • Original 146.9 kB
  • After minification 142.1 kB
  • After compression 28.3 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 118.5 kB or 81% of the original size.

Image Optimization

-11%

Potential reduce by 104.2 kB

  • Original 912.5 kB
  • After minification 808.4 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, Secure Paper Back Swap needs image optimization as it can save up to 104.2 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-30%

Potential reduce by 185.4 kB

  • Original 617.3 kB
  • After minification 617.3 kB
  • After compression 431.9 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 185.4 kB or 30% of the original size.

CSS Optimization

-5%

Potential reduce by 3.4 kB

  • Original 70.4 kB
  • After minification 70.4 kB
  • After compression 67.0 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. Secure.paperbackswap.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 55 (49%)

Requests Now

113

After Optimization

58

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 113 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Secure Paper Back Swap. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 37 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

secure.paperbackswap.com accessibility score

91

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

secure.paperbackswap.com best practices score

58

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

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

secure.paperbackswap.com SEO score

88

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

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

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Secure.paperbackswap.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Secure.paperbackswap.com main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

Open Graph description is not detected on the main page of Secure Paper Back Swap. 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: