informatikbuch.de | Free Online SEO Audit for informatikbuch.de

Tasks

Make the site mobile device friendly.
Select one version of your site as main and make a redirect from other versions to that one.
Avoid using deprecated HTML tags.
Implement the viewport meta tag.
Use "H" tags.

SEO

URL

Domain : informatikbuch.de/10.Auflage/index.html

Character length : 39

Title

Gumm Sommer: Einführung in die Informatik

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://informatikbuch.de/robots.txt

User-agent	Disallowed for the search engines
googlebot	All subpages are allowed to crawl

Social

Social Engagement

No info found.

Content

Doctype

Missing doctype element

Encoding

Error! The character encoding setting is missing!

Language

Error! No language localization is found.

Title

Gumm Sommer: Einführung in die Informatik

Character length : 46

Good! The title’s length is between 10 and 70 characters.

Text / HTML ratio

Ratio : 0%

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
0	0	0	0	0	0

No "H" tags found

Heading structure in the source code

Word cloud

Keyword matrix

word	title	descriptions	heading

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 1 images on this web page.

Alternate attributes for the following 1 images are missing. Search engines use "alt" tags to understand image content efficiently. We strongly recommend fixing this issue.

http://informatikbuch.de/pic/Umschlag10A.JPG

Technologies

Mobile optimization

Error! This website is not optimized for mobile devices... It is optimized for devices which have at least 731px wide display!

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 fast enough.

Loading time

391 ms

Table layout

Good! No nested tables found.

Render blocking resources

Good! No render blocking elements found!

Speed test – Javascript

Javascript

Good! Just a few javascript files are detected on the website.

File size of all javascript files combined

0.00

Javascript minifying

Great! The Javascript files are minified.

Speed test – CSS

CSS

Good! Just a few CSS files are used on this website.

File size of all css files combined

0.00

CSS minifying

Great! The CSS elements are minified.

Speed test – Compression

Uncompressed size of the of the HTML

0.00

Gzip compression

Your site uses compression.

Speed test – Browser cache

Browser cache

The browser cache is set correctly for all elements.

Speed test – Images

File size of all images combined

0.00

Image optimisation

All images are optimized.

Traffic

Alexa

19061996

Links

We found a total of 0 different links.

Website security

81.169.145.157

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.

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Icons

Favicon

Error! No favicon is found. Using favicon helps to build a better brand quicker.

Order of Heading elements on mobile by position

H1 : Einführung in die Informatik, ( 8px from top )
H3 : 10. Auflage, 2013., ( 107.4375px from top )
H2 : Prof. Dr. H.Peter Gumm, Prof. Dr. Manfred Sommer , ( 150.34375px from top )
H4 : Textproben, ( 269.25px from top )
H4 : Inhalt, ( 310.515625px from top )
H4 : Downloads, ( 340.515625px from top )
H4 : Vorwort, ( 351.78125px from top )
H5 : Kapitel 01, ( 382.6875px from top )
H4 : Kapitel 1, ( 393.046875px from top )
H5 : Kapitel 02, ( 423.859375px from top )
H4 : Kapitel 2, ( 434.3125px from top )
H5 : Kapitel 03, ( 465.03125px from top )
H4 : Kapitel 3, ( 475.578125px from top )
H5 : Kapitel 04, ( 506.203125px from top )
H4 : Kapitel 4, ( 516.84375px from top )
H5 : Kapitel 06, ( 547.375px from top )
H4 : Kapitel 5, ( 558.109375px from top )
H5 : Kapitel 08, ( 588.546875px from top )
H4 : Kapitel 6, ( 599.375px from top )
H5 : Kapitel 09, ( 629.71875px from top )
H4 : Kapitel 7, ( 640.640625px from top )
H5 : Kapitel 11, ( 670.890625px from top )
H4 : Kapitel 8, ( 681.90625px from top )
H4 : Kapitel 9, ( 723.171875px from top )
H4 : Kapitel 10, ( 764.4375px from top )
H4 : H.P.Gumm, ( 773.328125px from top )
H4 : Kapitel 11, ( 805.703125px from top )
H4 : M.Sommer, ( 814.59375px from top )
H4 : Kapitel 12, ( 846.96875px from top )
H4 : Errata, ( 855.859375px from top )
H4 : Index, ( 888.234375px from top )

Typos

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SEO report of informatikbuch.de

Gumm Sommer: Einführung in die Informatik

Tasks

SEO

Social

Content

Technologies

Speed test

Speed test – Javascript

Speed test – CSS

Speed test – Compression

Speed test – Browser cache

Speed test – Images

Traffic

Links

Website security

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Icons

Order of Heading elements on mobile by position

Typos

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