SEO report of canopenbook.com
Embedded Networking with CAN and CANopen - Home
www.canopenbook.com/
Error! The "meta description" is missing, the page has no summary description!
Tasks
- Select one version of your site as main and make a redirect from other versions to that one.
- Avoid using deprecated HTML tags.
SEO
URL
Domain : www.canopenbook.com/
Character length : 20
Title
Embedded Networking with CAN and CANopen - Home
Keywords (meta keywords)
Good! The website does not use “meta keywords”.
Open Graph Protocol
Error! The website does not use the OG (Open Graph) protocol.
Dublin Core
Dublin Core is not used
Underscores in the URLs
Good! No underscore (_) found in the URLs.
Search engine friendly URLs
Good! The website uses SEO friendly URLs.
Checking the robots.txt file
There is robots.txt file.
https://canopenbook.com/robots.txt
https://canopenbook.com/robots.txt
| User-agent | Disallowed for the search engines |
|---|---|
| * |
|
Social
Social Engagement
No info found.
Content
Doctype
HTML 5
Encoding
Perfect! The character encoding is set: UTF-8.
Language
We have found the language localisation: ”en”.
Title
Embedded Networking with CAN and CANopen - Home
Character length : 47
Good! The title’s length is between 10 and 70 characters.
Character length : 47
Good! The title’s length is between 10 and 70 characters.
Text / HTML ratio
Ratio : 14%
Error! The text / HTML code ratio is under 15 percent on this website. This value shows that the website has relatively few text content.
Error! The text / HTML code ratio is under 15 percent on this website. This value shows that the website has relatively few text content.
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
|---|---|---|---|---|---|
| 1 | 5 | 2 | 9 | 0 | 0 |
Heading structure in the source code
- <H1> Embedded Networking with CAN and CANopen
- <H2> Embedded Networking with CAN and CANopen
- <H4> Europe
- <H4> North America
- <H4> Other Regions
- <H2> About The Book
- <H3> Being three authors, we divided Embedded Networking with CAN and CANopen into three parts:
- <H4> Part 1: Using CANopen, by Olaf Pfeiffer
- <H4> Part 2: CANopen Engineering, by Christian Keydel
- <H4> Part 3: CANopen Reference, by Andrew Ayre
- <H3> Errata (historic)
- <H2> Files Mentioned in the Book
- <H2> CANopen Example Code ("MicroCANopen")
- <H2> Links
- <H4> Buy
- <H4> Programs
- <H4> Info
Word cloud
- canopen29
- part8
- embedded8
- www7
- csv6
- example6
- object5
- book5
- networking5
- microcanopen4
- info4
- order4
- sheet4
- reference4
- code4
- all4
- edition3
- first3
- amazon3
- link3
- dictionary3
- page3
- please3
- spread3
- network3
- errata3
- links3
- files3
- format3
- systems3
- published3
- academy3
- program3
- required2
- last2
- canbus2
- configuration2
- knowledge2
- introduced2
- data2
- minimal2
- eds2
- cia2
- home2
- store2
- online2
- products2
- software2
- ayre2
- using2
- olaf2
- rtc2
- pfeiffer2
- christian2
- america2
- cancrypt2
- books2
- andrew2
- revised2
- europe2
Keyword matrix
| word | title | descriptions | heading |
|---|---|---|---|
| canopen | |||
| part | |||
| embedded | |||
| www | |||
| csv | |||
| example |
Two Word cloud
- embedded networking3
- info page3
- with spread3
- use with3
- example code3
- this part3
Three Word cloud
- use with spread3
- please use this2
- embedded systems academy2
- revised first edition2
404 Page
The website has a 404 error page.
Flash content
Good! The website does not have any flash contents.
Frame
Good! The website does not use iFrame solutions.
Images
We found 2 images on this web page.
Alternate attributes for the following 2 images are missing. Search engines use "alt" tags to understand image content efficiently. We strongly recommend fixing this issue.
Alternate attributes for the following 2 images are missing. Search engines use "alt" tags to understand image content efficiently. We strongly recommend fixing this issue.
Readability
Flesch–Kincaid Grade Level
9.00
Flesch Reading Ease
40.20
Coleman Liau Index
12.00
Automated Readability Index (ARI)
7.00
Dale–Chall Readability
8.60
SMOG Index
10.20
Spache Readibility
5.00
Number of letters
3070
Number of words
561
Number of sentences
105
Average words per sentences
5
Number of syllables
1069
Syllables in words
1060
Average syllables in words
1.91
Number of words in first three syllables
157
Percentage of word / syllables
27.99
Words not in Dale-Chall easy-word list
297
Words not in Spache easy-word list
177
Technologies
Mobile optimization
This website is optimal for mobile devices!
Deprecated HTML elements
Good! No deprecated HTML tags are detected.
Redirection (www / not www)
Error! The web address is accessible with and without www!
Deprecated HTML elements
Good! No deprecated HTML tags are detected.
Printability
Suggestion! Unfortunately, no printer-friendly CSS found.
Meta Tag (viewport tag, mobile devices)
Error! The meta tag named viewport is missing.
Speed test
Server response time
The server response time is not fast enough: 0.45 seconds have passed until the page started to load.
Loading time
1,512 ms
Table layout
Good! No nested tables found.
Number of HTTP resources
16
Number of source domains
3
Render blocking resources
The elements below are blocking the “above the fold” rendering.
List of render blocking javascript files
List of render blocking javascript files
- https://www.canopenbook.com/.. /jquery.min.js?9d1291d713c87bb8f57accb167...
- https://www.canopenbook.com/.. /jquery-noconflict.js?9d1291d713c87bb8f57...
- https://www.canopenbook.com/.. /jquery-migrate.min.js?9d1291d713c87bb8f5...
- https://www.canopenbook.com/.. /uikit.min.js?v=1.13.2
- https://www.canopenbook.com/.. /uikit-icons-max.min.js?v=1.13.2
- https://www.canopenbook.com/templates/yootheme/js/theme.js?v=1.13.2
- https://www.canopenbook.com/.. /theme.9.css?v=1521985038
- https://fonts.googleapis.com/css?family=Roboto:300,400|Roboto+Condens...
- https://www.canopenbook.com/.. /theme.update.css?v=1.13.2
Speed test – Javascript
Javascript
Error! Too many javascript files found which slows down the page load on the website.
- http://www.canopenbook.com/media/jui/js/jquery.min.js?b1eaa9b3bc7d0cf5e49fa28737400f64
- http://www.canopenbook.com/media/jui/js/jquery-noconflict.js?b1eaa9b3bc7d0cf5e49fa28737400f64
- http://www.canopenbook.com/media/jui/js/jquery-migrate.min.js?b1eaa9b3bc7d0cf5e49fa28737400f64
- http://www.canopenbook.com/media/jui/js/bootstrap.min.js?b1eaa9b3bc7d0cf5e49fa28737400f64
- http://www.canopenbook.com/templates/yootheme/vendor/assets/uikit/dist/js/uikit.min.js?v=1.6.3
- http://www.canopenbook.com/templates/yootheme/vendor/assets/uikit/dist/js/uikit-icons-max.min.js?v=1.6.3
- http://www.canopenbook.com/templates/yootheme/js/theme.js?v=1.6.3
File size of all javascript files combined
296.77KB
Javascript minifying
You can save 175B (19% compression) on the analysed URL by minifying the javascript files.
Speed test – CSS
CSS
Good! Just a few CSS files are used on this website.
- http://www.canopenbook.com/templates/yootheme/css/theme.css?v=1491483369
- http://www.canopenbook.com/templates/yootheme/css/theme.update.css?v=1.6.3
File size of all css files combined
397.46KB
CSS minifying
Great! The CSS elements are minified.
Speed test – Compression
Uncompressed size of the of the HTML
32.08KB
Gzip compression
Your site uses compression.
Speed test – Browser cache
Number of static resources (image, JS, CSS)
2
Browser cache
The browser cache is not set correctly for all elements.
| URL | Duration |
|---|---|
| https://www.canopenbook.com/.. /cob-bg3-8dcd0e80.png | Expiry time is not specified |
Speed test – Images
File size of all images combined
1.14MB
Image optimisation
All images are optimized.
Links
We found a total of 24 different links.
Internal links: 11
External links: 13
Internal links: 11
External links: 13
External links:
Internal links:
Website security
IP
85.214.140.95
External hidden links
Good! No hidden external links found
Looking for eval()
Good! No eval(bas64_decode()) scripts are found
Checking for XSS vulnerability
No XSS vulnerability found
Email encryption
Good! We have not found any unencrypted email addresses.
Sites on same ip
Icons
Favicon
Good! The website uses favicon.
Order of Heading elements on mobile by position
- H1 : Embedded Networking with CAN and CANopen , ( 120.35751342773px from top )
- H2 : Embedded Networking with CAN and CANopen , ( 550px from top )
- H4 : Europe , ( 1028px from top )
- H4 : North America , ( 1151px from top )
- H4 : Other Regions , ( 1248px from top )
Typos
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