Tools & Wizards About Us
secure.paperbackswap.com screenshot

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

secure.paperbackswap.com screenshot

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

secure.paperbackswap.com

secure.paperbackswap.com

225 ms

index.php

index.php

285 ms

global.css

global.css

89 ms

global.css

global.css

94 ms

jquery-3.5.1.js

jquery-3.5.1.js

24 ms

jquery-ui.js

jquery-ui.js

31 ms

modal.css

modal.css

89 ms

jquery.colorbox-min.js

jquery.colorbox-min.js

90 ms

jquery.rollover.js

jquery.rollover.js

92 ms

global.js

global.js

91 ms

global.js

global.js

206 ms

qm.min.js

qm.min.js

176 ms

qm_keyboard_access.min.js

qm_keyboard_access.min.js

175 ms

js

js

68 ms

bootstrap_col.css

bootstrap_col.css

176 ms

global_responsive.css

global_responsive.css

176 ms

yahoo-dom-event.js

yahoo-dom-event.js

36 ms

carousel_yui_2.7.css

carousel_yui_2.7.css

177 ms

adsbygoogle.js

adsbygoogle.js

411 ms

client_details.min.js

client_details.min.js

494 ms

combo

combo

37 ms

carousel_yui_2.7.min.js

carousel_yui_2.7.min.js

494 ms

analytics.js

analytics.js

250 ms

GyIWvu2_R9Q

GyIWvu2_R9Q

347 ms

9780439784542.jpg

9780439784542.jpg

411 ms

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316 ms

ir

ir

19546 ms

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329 ms

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333 ms

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370 ms

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361 ms

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359 ms

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358 ms

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357 ms

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359 ms

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398 ms

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398 ms

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411 ms

9780064442053.jpg

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411 ms

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410 ms

9780684800011.jpg

9780684800011.jpg

885 ms

9780812995824.jpg

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885 ms

9781598530094.jpg

9781598530094.jpg

885 ms

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9780452295834.jpg

886 ms

9781591846352.jpg

9781591846352.jpg

885 ms

9781594202667.jpg

9781594202667.jpg

885 ms

9780765326355.jpg

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1099 ms

9781400054350.jpg

9781400054350.jpg

1099 ms

ir

ir

19539 ms

ir

ir

19539 ms

ir

ir

19539 ms

ir

ir

19539 ms

ir

ir

19539 ms

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ir

19539 ms

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ir

19539 ms

ir

ir

19539 ms

sprites.png

sprites.png

248 ms

submenu_indicator.png

submenu_indicator.png

248 ms

submenu_indicator_sub.png

submenu_indicator_sub.png

324 ms

pbs_simple_64.jpg

pbs_simple_64.jpg

324 ms

lock_icon.gif

lock_icon.gif

392 ms

browse_book3_130px.png

browse_book3_130px.png

392 ms

add_book3_130px.png

add_book3_130px.png

394 ms

club_lists.png

club_lists.png

667 ms

832755446.jpg

832755446.jpg

658 ms

arrow_curved_green_left_sm.png

arrow_curved_green_left_sm.png

665 ms

epostage2.jpg

epostage2.jpg

880 ms

recycle_load_64.gif

recycle_load_64.gif

881 ms

slotcar_library.js

slotcar_library.js

201 ms

show_ads_impl.js

show_ads_impl.js

488 ms

collect

collect

84 ms

collect

collect

48 ms

9781414307640.jpg

9781414307640.jpg

793 ms

9781400072941.jpg

9781400072941.jpg

792 ms

loader_blue_white.gif

loader_blue_white.gif

604 ms

www-player.css

www-player.css

6 ms

www-embed-player.js

www-embed-player.js

39 ms

base.js

base.js

81 ms

ga-audiences

ga-audiences

314 ms

ad_status.js

ad_status.js

333 ms

4FCBsbVWt5jZVKm36Bs_QtpgBkunTUSSklJnPgMburg.js

4FCBsbVWt5jZVKm36Bs_QtpgBkunTUSSklJnPgMburg.js

54 ms

embed.js

embed.js

24 ms

KFOmCnqEu92Fr1Mu4mxP.ttf

KFOmCnqEu92Fr1Mu4mxP.ttf

170 ms

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

178 ms

zrt_lookup.html

zrt_lookup.html

161 ms

ads

ads

614 ms

header-search1.PNG

header-search1.PNG

295 ms

details_ico2.png

details_ico2.png

325 ms

controls.png

controls.png

326 ms

border.png

border.png

325 ms

loading_background.png

loading_background.png

325 ms

loading.gif

loading.gif

355 ms

ads

ads

472 ms

ads

ads

321 ms

Create

Create

36 ms

id

id

32 ms

GenerateIT

GenerateIT

15 ms

12d95d4c7f28e5d768e0b461a4598061.js

12d95d4c7f28e5d768e0b461a4598061.js

26 ms

load_preloaded_resource.js

load_preloaded_resource.js

24 ms

5cad5a605d634f684c7cf1ecfca85228.js

5cad5a605d634f684c7cf1ecfca85228.js

44 ms

abg_lite.js

abg_lite.js

43 ms

window_focus.js

window_focus.js

89 ms

qs_click_protection.js

qs_click_protection.js

89 ms

ufs_web_display.js

ufs_web_display.js

14 ms

c653839755d9d9a3a773c62a0253f53f.js

c653839755d9d9a3a773c62a0253f53f.js

57 ms

icon.png

icon.png

149 ms

s

s

128 ms

reactive_library.js

reactive_library.js

355 ms

ca-pub-8071084392572051

ca-pub-8071084392572051

221 ms

css

css

201 ms

ads

ads

679 ms

ads

ads

254 ms

ads

ads

249 ms

ads

ads

656 ms

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3 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

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7 ms

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68 ms

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26 ms

fullscreen_api_adapter.js

fullscreen_api_adapter.js

89 ms

interstitial_ad_frame.js

interstitial_ad_frame.js

94 ms

feedback_grey600_24dp.png

feedback_grey600_24dp.png

95 ms

settings_grey600_24dp.png

settings_grey600_24dp.png

95 ms

activeview

activeview

81 ms

one_click_handler_one_afma.js

one_click_handler_one_afma.js

72 ms

13644676892651314087

13644676892651314087

43 ms

8mk731zYjtAK1ZddBZG3rzb7fLiVBXbgU8YQ_Ehq5z0.js

8mk731zYjtAK1ZddBZG3rzb7fLiVBXbgU8YQ_Ehq5z0.js

40 ms

activeview

activeview

140 ms

log_event

log_event

17 ms

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

secure.paperbackswap.com

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: