vøiddo

rankd scores the post you are writing on a 0-100 quality scale, in the editor sidebar. Six axes — readability, structure, length, links, images, title — plus actionable suggestions on what to fix before you hit publish.
The plugin connects to your rankd account. Each WordPress verdict uses the same rankd quota as the web product: free accounts get 2 verdicts per day; Pro gets 500 verdicts per month.
<h4>What it does</h4>
<ul>
<li>Editor sidebar verdict — opens as a meta box on every post and page edit screen</li>
<li>Six axes scored 0-100 — readability, structure, length, links, images, title</li>
<li>Actionable suggestions — short, specific, ranked by impact</li>
<li>Quota-aware — runs only when you click, so typing does not burn verdicts</li>
<li>Works in Gutenberg and Classic Editor — auto-detects which one you are using</li>
</ul>
<h3>External Services</h3>
This plugin connects to <code>https://rankd.voiddo.com/api/wp/content-score</code> when you click run rankd verdict.
What data is sent and when:
<ul>
<li>post title</li>
<li>post content</li>
<li>site URL</li>
</ul>
The plugin sends that data only when you click run rankd verdict. It does not send content while you type. It does not write post meta, publish content, or alter your post.
Why the service exists:
<ul>
<li>generate a 0-100 content quality verdict</li>
<li>return ranked suggestions before publish</li>
<li>apply the same quota logic as the rankd web app</li>
</ul>
A rankd account and WordPress API token are required. Free rankd accounts include 2 verdicts per day. rankd Pro includes 500 verdicts per month and is available at $4.99/month or $49.99/year. Pricing and quota may be changed on the rankd pricing page, and the active quota returned by rankd is shown after each verdict.
Service pages:
<ul>
<li>Pricing: https://rankd.voiddo.com/pricing</li>
<li>Privacy: https://rankd.voiddo.com/privacy</li>
<li>Terms: https://rankd.voiddo.com/terms</li>
<li>Support: support@voiddo.com</li>
</ul>
<h4>Why a sidebar scorer</h4>
Existing SEO plugins focus on keyword targeting and serialize their advice across multiple panels. rankd answers a different question: “is this post structurally good before I worry about keywords?” — readability, sectioning, link density, image alt text, title length. The basics that lift any post regardless of niche.
<h4>Six axes scored</h4>
<ul>
<li>Readability — sentence length and word complexity (lower is easier)</li>
<li>Structure — H2/H3 distribution and section count</li>
<li>Length — sweet-spot around 800-2000 words; penalty at the extremes</li>
<li>Links — outbound + internal density (1 per ~250 words is healthy)</li>
<li>Images — at least one image with alt text on posts over ~200 words</li>
<li>Title — 30-65 characters is the SEO sweet spot</li>
</ul>
The composite is a weighted average; each axis is exposed individually so you can see what is dragging.
<h4>How it differs from generic readability tools</h4>
<ul>
<li>Lives where you write — the WordPress editor sidebar — not a separate site</li>
<li>Uses the same rankd quota and upgrade path as the main product</li>
<li>Runs on explicit click only — no quota burn while typing</li>
<li>Keeps the verdict separate from publishing — you decide what to change</li>
</ul>
<h3>About</h3>
Built by vøiddo — a small studio shipping AI-flavoured products, free dev tools, Chrome extensions and weird browser games.

rankd — Content Quality Scorer

Score any post's quality 0-100 before you publish. Connects to your rankd account and uses your rankd verdict quota.

AS OF MAY 2016, THIS PLUGIN IS NOT BEING MAINTAINED AND WILL NOT RECEIVE ANY FUTURE UPDATES. 
CONTACT ME IF YOU’D LIKE TO LIST AN ALTERNATIVE HERE.
Shows word and sentence counts plus a readability analysis of the post 
currently being edited using three different readability measurements.
Readability analysis is an attempt to show how difficult a text is to read. 
There are several methods of doing readability analysis. The most popular 
methods are used here. The Flesch and Flesch-Kincaid methods use formulas based 
on the average number of words per sentence and the average number of syllables 
per word. The Gunning-Fog method uses a formula based on the average number of 
words per sentence and the percentage of “hard” words (words with 3 or more 
syllables) in the passage.
Both the Gunning-Fog and the Flesch-Kincaid give a score that is the number of 
years of education the reader must have completed to understand the text. 
Different types of writing calls for different scores. Technical subjects may 
require a higher level of education so a higher Fog or Kincaid score is 
acceptable. Informal writing may try for a score in the 7-10 range. The Flesch 
score is a percentage. The higher the value, the better the readability.

FD Word Statistics Plugin

Shows word and sentence counts plus a readability analysis of the post currently being edited using three different readability measurements.

rankd — Content Quality Scorer vs FD Word Statistics Plugin