Tools & Wizards About Us
corwin.com screenshot

Report Summary

  • 60

    Performance

    Renders faster than
    76% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

corwin.com

Corwin | Professional Development Book Publisher

Page Load Speed

2.2 sec in total

First Response

173 ms

Resources Loaded

1.7 sec

Page Rendered

298 ms

corwin.com screenshot

About Website

Click here to check amazing Corwin content for United States. Otherwise, check out these important facts you probably never knew about corwin.com

Visit corwin.com

Key Findings

We analyzed Corwin.com page load time and found that the first response time was 173 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

corwin.com performance score

60

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

85/100

10%

LCP (Largest Contentful Paint)

Value4.4 s

38/100

25%

SI (Speed Index)

Value3.0 s

94/100

10%

TBT (Total Blocking Time)

Value300 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0.198

62/100

15%

TTI (Time to Interactive)

Value28.1 s

0/100

10%

Network Requests Diagram

corwin.com

173 ms

www.corwin.com

246 ms

reset-min.css

21 ms

container.css

31 ms

reset-fonts-grids.css

42 ms

Our browser made a total of 62 requests to load all elements on the main page. We found that 69% of them (43 requests) were addressed to the original Corwin.com, 24% (15 requests) were made to Ajax.googleapis.com and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Corwin.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 166.6 kB (63%)

Content Size

263.6 kB

After Optimization

96.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Corwin.com main page is 263.6 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. 30% of websites need less resources to load. Javascripts take 92.5 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 36.4 kB

  • Original 46.2 kB
  • After minification 43.1 kB
  • After compression 9.8 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 36.4 kB or 79% of the original size.

Image Optimization

-78%

Potential reduce by 50.2 kB

  • Original 64.5 kB
  • After minification 14.2 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, Corwin needs image optimization as it can save up to 50.2 kB or 78% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-34%

Potential reduce by 31.4 kB

  • Original 92.5 kB
  • After minification 84.3 kB
  • After compression 61.1 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 31.4 kB or 34% of the original size.

CSS Optimization

-80%

Potential reduce by 48.6 kB

  • Original 60.5 kB
  • After minification 52.0 kB
  • After compression 11.8 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. Corwin.com needs all CSS files to be minified and compressed as it can save up to 48.6 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 38 (63%)

Requests Now

60

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 60 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Corwin. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

corwin.com

corwin.com

173 ms

www.corwin.com

www.corwin.com

246 ms

reset-min.css

reset-min.css

21 ms

container.css

container.css

31 ms

reset-fonts-grids.css

reset-fonts-grids.css

42 ms

menu.css

menu.css

39 ms

tabview.css

tabview.css

45 ms

jquery-ui.css

jquery-ui.css

41 ms

layout.css

layout.css

224 ms

master.css

master.css

214 ms

cms.css

cms.css

211 ms

editor.css

editor.css

143 ms

teacherLogo.gif

teacherLogo.gif

73 ms

youtubeLogo.gif

youtubeLogo.gif

139 ms

twitterLogo.gif

twitterLogo.gif

141 ms

facebookLogo.gif

facebookLogo.gif

143 ms

header_logo.png

header_logo.png

316 ms

Info.png

Info.png

520 ms

NEW+N152N2+Feature+box+for+Fisher_Frey+PDRCP_FINAL_REVISED_Mar09-2015.jpg

NEW+N152N2+Feature+box+for+Fisher_Frey+PDRCP_FINAL_REVISED_Mar09-2015.jpg

593 ms

1_VL_Watch2WinVL.jpg

1_VL_Watch2WinVL.jpg

634 ms

1-Monday+Series_Feature+box+ad_320+x+350.jpg

1-Monday+Series_Feature+box+ad_320+x+350.jpg

461 ms

1_Jim_Knight_Feature_Box_FINAL.jpg

1_Jim_Knight_Feature_Box_FINAL.jpg

531 ms

N14B91_Corwin_Connect_300x100px_FINAL.jpg

N14B91_Corwin_Connect_300x100px_FINAL.jpg

495 ms

yuiloader-dom-event.js

yuiloader-dom-event.js

21 ms

animation-min.js

animation-min.js

14 ms

container-min.js

container-min.js

21 ms

menu-min.js

menu-min.js

19 ms

element-min.js

element-min.js

14 ms

tabview-min.js

tabview-min.js

25 ms

jquery.min.js

jquery.min.js

34 ms

jquery-ui.min.js

jquery-ui.min.js

43 ms

modernizr.1.6.min.js

modernizr.1.6.min.js

642 ms

jquery.truncator.js

jquery.truncator.js

672 ms

jsCart.nav

jsCart.nav

448 ms

ui.js

ui.js

713 ms

Book%20stack.jpg

Book%20stack.jpg

706 ms

Institutes.jpg

Institutes.jpg

853 ms

Moscorro%2C%20Loan.jpg

Moscorro%2C%20Loan.jpg

1220 ms

CTAmobilefriendly.jpg

CTAmobilefriendly.jpg

855 ms

logo%2001.png

logo%2001.png

916 ms

ga.js

ga.js

89 ms

listImage.gif

listImage.gif

142 ms

background.gif

background.gif

685 ms

salesPhone.gif

salesPhone.gif

686 ms

regSign.gif

regSign.gif

688 ms

searchGradient.gif

searchGradient.gif

794 ms

search.png

search.png

792 ms

dropdown_arrow.gif

dropdown_arrow.gif

727 ms

reviewCopy.gif

reviewCopy.gif

739 ms

shopTrolley.gif

shopTrolley.gif

798 ms

header_links_gradient.gif

header_links_gradient.gif

809 ms

arrow.gif

arrow.gif

937 ms

featurebox_link_grad.png

featurebox_link_grad.png

862 ms

featurebox_link_pointer.png

featurebox_link_pointer.png

973 ms

featurebox_link_grad_light.png

featurebox_link_grad_light.png

868 ms

NavSelected.gif

NavSelected.gif

879 ms

NavBg.gif

NavBg.gif

931 ms

listImage.gif

listImage.gif

938 ms

verisignLogo.gif

verisignLogo.gif

1055 ms

__utm.gif

__utm.gif

119 ms

ui-bg_flat_75_ffffff_40x100.png

ui-bg_flat_75_ffffff_40x100.png

17 ms

dropdown_arrow_right.gif

dropdown_arrow_right.gif

437 ms

Accessibility Review

corwin.com accessibility score

77

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

corwin.com 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

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

corwin.com SEO score

75

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

Links do not have descriptive text

High

Image elements do not have [alt] attributes

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

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Corwin.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 Corwin.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

corwin.com

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