Website review jrf.io
Jeffrey R. Fetzer
Generated on January 20 2026 18:22 PM
Old data? UPDATE !
The score is 55/100
SEO Content
Title
Jeffrey R. Fetzer
Length : 17
Perfect, your title contains between 10 and 70 characters.
Description
Length : 0
Very bad. We haven't found meta description on your page. Use this free online meta tags generator to create description.
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
Good, your page take advantage of Og Properties.
| Property | Content |
|---|---|
| title | Jeffrey R. Fetzer |
| locale | en |
| url | / |
| site_name | Jeffrey R. Fetzer |
| type | website |
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 2 | 2 | 0 | 0 | 0 | 0 |
- [H1] Replicating the Chrono Trigger Time Gate in GLSL
- [H1] Fun with Chaos Attractors
- [H2] Recently Updated
- [H2] {title}
Images
We found 1 images on this web page.
Good, most or all of your images have alt attributes.
Text/HTML Ratio
Ratio : 3%
This page's ratio of text to HTML code is below 15 percent, this means that your website probably needs more text content.
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
We have detected underscores in your URLs. You should rather use hyphens to optimize your SEO.
In-page links
We found a total of 7 links including 0 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| Jeffrey R. Fetzer | Internal | Passing Juice |
| Fun with Chaos Attractors | Internal | Passing Juice |
| Replicating the Chrono Trigger Time Gate in GLSL | Internal | Passing Juice |
| jrf | External | Passing Juice |
| Chirpy | External | Passing Juice |
| Jekyll | External | Passing Juice |
| {title} | Internal | Passing Juice |
SEO Keywords
Keywords Cloud
glsl replicating trigger home chrono gate jeffrey cancel time fetzer
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| jeffrey | 3 |  |
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| fetzer | 3 | |
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| home | 1 | |
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| cancel | 1 | |
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| replicating | 1 | |
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Usability
Url
Domain : jrf.io
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
HTML 5
Encoding
Perfect. Your declared charset is UTF-8.
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
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Apple Icon |
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Meta Viewport Tag |
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Flash content |
Optimization
XML Sitemap
Great, your website has an XML sitemap.
| /sitemap.xml </div> </article> </main> <!-- panel --> <aside aria-label="Panel" id="panel-wrapper" class="col-xl-3 ps-2 text-muted"> <div class="access"> <!-- Get 5 last posted/updated posts --> <section id="access-lastmod"> <h2 class="panel-heading">Recently Updated</h2> <ul class="content list-unstyled ps-0 pb-1 ms-1 mt-2"> <li class="text-truncate lh-lg"> <a href="/chaos/2025/05/30/chaos_attractors.html">Fun with Chaos Attractors</a> </li> <li class="text-truncate lh-lg"> <a href="/chronotrigger/glsl/2025/05/30/timegate.html">Replicating the Chrono Trigger Time Gate in GLSL</a> </li> </ul> </section> <!-- #access-lastmod --> <!-- The trending tags list --> </div> </aside> </div> <div class="row"> <!-- tail --> <div id="tail-wrapper" class="col-12 col-lg-11 col-xl-9 px-md-4"> <!-- The Footer --> <footer aria-label="Site Info" class=" d-flex flex-column justify-content-center text-muted flex-lg-row justify-content-lg-between align-items-lg-center pb-lg-3 " > <p>© <time>2026</time> <a href="https://github.com/jrf">jrf</a>. <span data-bs-toggle="tooltip" data-bs-placement="top" title="Except where otherwise noted, the blog posts on this site are licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License by the author." >Some rights reserved.</span> </p> <p>Using the <a data-bs-toggle="tooltip" data-bs-placement="top" title="v7.2.4" href="https://github.com/cotes2020/jekyll-theme-chirpy" target="_blank" rel="noopener" >Chirpy</a> theme for <a href="https://jekyllrb.com" target="_blank" rel="noopener">Jekyll</a>. </p> </footer> </div> </div> <!-- The Search results --> <div id="search-result-wrapper" class="d-flex justify-content-center d-none"> <div class="col-11 content"> <div id="search-hints"> <!-- The trending tags list --> </div> <div id="search-results" class="d-flex flex-wrap justify-content-center text-muted mt-3"></div> </div> </div> </div> <aside aria-label="Scroll to Top"> <button id="back-to-top" type="button" class="btn btn-lg btn-box-shadow"> <i class="fas fa-angle-up"></i> </button> </aside> </div> <div id="mask" class="d-none position-fixed w-100 h-100 z-1"></div> <!-- Embedded scripts --> <!-- Jekyll Simple Search loader See: <https://github.com/christian-fei/Simple-Jekyll-Search> --> <script> document.addEventListener('DOMContentLoaded', () => { SimpleJekyllSearch({ searchInput: document.getElementById('search-input'), resultsContainer: document.getElementById('search-results'), json: '/assets/js/data/search.json', searchResultTemplate: ' <article class="px-1 px-sm-2 px-lg-4 px-xl-0"> <header> <h2><a href="{url}">{title}</a></h2> <div class="post-meta d-flex flex-column flex-sm-row text-muted mt-1 mb-1"> {categories} {tags} </div> </header> <p>{snippet}</p> </article>', noResultsText: '<p class="mt-5">Oops! No results found.</p>', templateMiddleware: function(prop, value, template) { if (prop === 'categories') { if (value === '') { return `${value}`; } else { return `<div class="me-sm-4"><i class="far fa-folder fa-fw"></i>${value}</div>`; } } if (prop === 'tags') { if (value === '') { return `${value}`; } else { return `<div><i class="fa fa-tag fa-fw"></i>${value}</div>`; } } } }); }); </script> </body> </html> |
Robots.txt
https://jrf.io/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
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