Website review w3future.com
Sjoerd Visscher's playground
Generated on May 04 2026 08:24 AM
Old data? UPDATE !
The score is 60/100
SEO Content
Title
Sjoerd Visscher's playground
Length : 28
Perfect, your title contains between 10 and 70 characters.
Description
Website of Sjoerd Visscher with various experiments.
Length : 52
Ideally, your meta description should contain between 70 and 160 characters (spaces included). Use this free tool to calculate text length.
Keywords
Very bad. We haven't found meta keywords on your page. Use this free online meta tags generator to create 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 | 5 | 0 | 0 | 0 | 0 |
- [H1] Sjoerd Visscher's playground
- [H2] Effects
- [H2] Games
- [H2] Music
- [H2] Other
- [H2] Elsewhere
Images
We found 0 images on this web page.
Good, most or all of your images have alt attributes.
Text/HTML Ratio
Ratio : 30%
Ideal! This page's ratio of text to HTML code is between 25 and 70 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 24 links including 0 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| Feedback | Internal | Passing Juice |
| Video Feedback | Internal | Passing Juice |
| IFS tree | Internal | Passing Juice |
| Colored blobs | Internal | Passing Juice |
| Morphing platonic solids in SVG | Internal | Passing Juice |
| 3D animated head of Thom Yorke | Internal | Passing Juice |
| The Droste effect using your webcam | Internal | Passing Juice |
| 4D Sudoku | Internal | Passing Juice |
| JS1k 2010 entry: Tetris (updated version) | Internal | Passing Juice |
| Hexagonal Keyboard Layout | Internal | Passing Juice |
| XOR (composition) | External | Passing Juice |
| XOR2 (composition) | External | Passing Juice |
| Soundcloud | External | Passing Juice |
| Animated TOC navigation | Internal | Passing Juice |
| A plot of complex roots | Internal | Passing Juice |
| A colorpicker | Internal | Passing Juice |
| Regex fractals | Internal | Passing Juice |
| Github | External | Passing Juice |
| My packages on Hackage | External | Passing Juice |
| Bluesky | Internal | Passing Juice |
| Mastodon | External | Passing Juice |
| External | Passing Juice | |
| Codepen | External | Passing Juice |
| My old site | Internal | Passing Juice |
SEO Keywords
Keywords Cloud
xor2 visschers playground toc roots composition animated xor sjoerd soundcloud
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| sjoerd | 2 |  |
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| playground | 2 | |
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| composition | 2 | |
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| visschers | 2 | |
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| roots | 1 | |
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Usability
Url
Domain : w3future.com
Length : 12
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
HTML 5
Encoding
You have not specified the document's charset. Use this free meta tags generator to declare document's charset.
W3C Validity
Errors : 0
Warnings : 0
Email Privacy
Great no email address has been found in plain text!
Deprecated HTML
Great! We haven't found deprecated HTML tags in your HTML.
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. |
|
Perfect, your website takes 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://w3future.com/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.