Website review jjj.de
jj's USEFUL and UGLY pages
Generated on March 30 2026 18:27 PM
Old data? UPDATE !
The score is 54/100
SEO Content
Title
jj's USEFUL and UGLY pages
Length : 26
Perfect, your title contains between 10 and 70 characters.
Description
Web page of Joerg Arndt
Length : 23
Ideally, your meta description should contain between 70 and 160 characters (spaces included). Use this free tool to calculate text length.
Keywords
plane-filling curves, fxt library, algorithms, mathematics
Good, your page contains meta keywords.
Og Meta Properties
This page does not take advantage of Og Properties. This tags allows social crawler's better structurize your page. Use this free og properties generator to create them.
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 1 | 0 | 1 | 0 | 0 | 0 |
- [H1] jj's useful and ugly pages
- [H3] contacting me
Images
We found 0 images on this web page.
Good, most or all of your images have alt attributes.
Text/HTML Ratio
Ratio : 17%
Good, this page's ratio of text to HTML code is higher than 15, but lower than 25 percent.
Flash
Perfect, no Flash content has been detected on this page.
Iframe
Great, there are no Iframes detected on this page.
SEO Links
URL Rewrite
Good. Your links looks friendly!
Underscores in the URLs
Perfect! No underscores detected in your URLs.
In-page links
We found a total of 26 links including 1 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| STUPID-BOT-TXT | Internal | Passing Juice |
| Plane-filling curves | Internal | Passing Juice |
| the FXT library | Internal | Passing Juice |
| bit wizardry | Internal | Passing Juice |
| algorithms | Internal | Passing Juice |
| "Matters Computational" | Internal | Passing Juice |
| FFT | Internal | Passing Juice |
| HFLOAT package | Internal | Passing Juice |
| arctan page | Internal | Passing Juice |
| mathematical data | Internal | Passing Juice |
| publications | Internal | Passing Juice |
| pari/gp scripts | Internal | Passing Juice |
| German | Internal | Passing Juice |
| English | Internal | Passing Juice |
| emacs | Internal | Passing Juice |
| zsh/bash | Internal | Passing Juice |
| X11 and ctwm | Internal | Passing Juice |
| memxfer | Internal | Passing Juice |
| replace | Internal | Passing Juice |
| bugfix for pdiff | Internal | Passing Juice |
| fake conferences and junk journals | Internal | Passing Juice |
| unsorted | Internal | Passing Juice |
| hakmem | Internal | Passing Juice |
| . | Internal | Passing Juice |
| coresystems | External | Passing Juice |
| TMT | External | Passing Juice |
SEO Keywords
Keywords Cloud
scripts useful parigp configuration algorithms arctan fxt some ctwm emacs
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| some | 3 |  |
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| configuration | 3 | |
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| algorithms | 2 | |
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| useful | 2 | |
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| arctan | 2 | |
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Usability
Url
Domain : jjj.de
Length : 6
Favicon
Great, your website has a favicon.
Printability
We could not find a Print-Friendly CSS.
Language
Good. Your declared language is en.
Dublin Core
This page does not take advantage of Dublin Core.
Document
Doctype
Missing doctype
Encoding
Perfect. Your declared charset is ISO-8859-15.
W3C Validity
Errors : 0
Warnings : 0
Email Privacy
Great no email address has been found in plain text!
Deprecated HTML
| Deprecated tags | Occurrences |
|---|---|
| <FONT> | 2 |
| <center> | 2 |
Deprecated HTML tags are HTML tags that are no longer used. It is recommended that you remove or replace these HTML tags because they are now obsolete.
Speed Tips
|
Excellent, your website doesn't use nested tables. |
|
Perfect. No inline css has been found in HTML tags! |
|
Great, your website has few CSS files. |
|
Perfect, your website has few JavaScript files. |
|
Too bad, your website does not take advantage of gzip. |
Mobile
Mobile Optimization
|
Apple Icon |
|
Meta Viewport Tag |
|
Flash content |
Optimization
XML Sitemap
Missing
Your website does not have an XML sitemap - this can be problematic.
A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.
Robots.txt
https://jjj.de/robots.txt
Great, your website has a robots.txt file.
Analytics
Missing
We didn't detect an analytics tool installed on this website.
Web analytics let you measure visitor activity on your website. You should have at least one analytics tool installed, but It can also be good to install a second in order to cross-check the data.
PageSpeed Insights
Device
Categories
Free SEO Testing Tool
Free SEO Testing Tool is a free SEO tool which provides you content analysis of the website.