DiagnoSEO.com

DiagnoSEO is the ultimate SEO plugin for WordPress in 2025. It includes all features you need to optimize your WordPress website and rank better in search engines. Moreover, it’s the most lightweight and fastest SEO plugin on the market in 2025 (optimized for Core Web Vitals). It’s the fastest SEO plugin according to WP Hive tests. Use the best SEO plugin and boost your organic rankings, traffic, and sales!
Key SEO features:
<ul>
<li>Custom meta title text (essential for SEO)</li>
<li>Custom meta description text</li>
<li>Meta tags templates</li>
<li>Google snippet preview</li>
<li>Custom rel canonical URL</li>
<li>Meta robots control</li>
<li>Optimization for multiple related keywords</li>
<li>Advanced Schema.org settings (review, product, event, etc.)</li>
<li>Breadcrumbs (schema and HTML)</li>
<li>Easy to insert web analytics tracking code (e.g. Google Analytics or Google Tag Manager)</li>
<li>Social settings and previews</li>
<li>Useful SEO checkpoints</li>
<li>XML Sitemap</li>
<li>Feature to redirect attachment page links to image file</li>
</ul>
Unique SEO features:
<ul>
<li>Focus keyword placement checkpoints</li>
<li>Content analyzer checkpoints</li>
<li>Multiple related keywords checkpoints</li>
<li>Advanced SEO settings (you can’t find them in the other SEO plugins)</li>
<li>Lightweight code (less than 100KB)</li>
<li>Minimal usage of memory and database (optimized for Core Web Vitals)</li>
<li>Unique SEO features (used by SEO experts)</li>
<li>Live SEO score</li>
<li>Great UX</li>
<li>Easy to run and customize</li>
<li>Easy to import data and switch from popular SEO plugins (you can import data from Yoast SEO, Rank Math, SEOPress, and many more)</li>
<li>Many many more unique features.</li>
</ul>
Pro SEO features:
<ul>
<li>Related keywords suggestions (data based on real search results analysis and TF IDF algorithm)</li>
<li>Unlocked advanced and useful content quality checkpoints (data based on real search results analysis)</li>
<li>Same as schema.org for better social media accounts connections</li>
<li>LocalBusiness schema.org</li>
<li>Redirections (301, 302)</li>
<li>Google News sitemap (XML)</li>
<li>Multiple schema.org support</li>
<li>Table of contents block</li>
<li>Related posts widget</li>
<li>Featured posts widget</li>
<li>SEO Categories widget</li>
<li>SEO Categories widget for WooCommerce</li>
<li>Advanced WooCommerce metadata support</li>
<li>Anchor text control on posts lists (you can control anchor text on your blog page)</li>
<li>Affiliate link hider (better solution than rel nofollow)</li>
<li>Internal linking suggestions (data based on real search results analysis)</li>
<li>Option to change all external links to nofollow (Multisite supported)</li>
<li>IndexNow support (for super-fast indexation in Bing and Yandex)</li>
</ul>
ChatGPT integration – GPT-3-Turbo or GPT-4 API – technology from OpenAI company (available only in Pro version):
<ul>
<li>Generate or improve metadata based on AI (artificial intelligence) and best SEO practices</li>
<li>Generate SEO-friendly content directly in WordPress editor based on settings</li>
<li>Generate comments based on settings</li>
</ul>
The plugin was created based on over 15 years of experience in SEO and WordPress.
<a href="https://diagnoseo.com/wordpress-seo-plugin/" rel="nofollow ugc">WordPress SEO plugin – read full features list and details</a>
The plugin includes a unique content analyzer and keyword placement checkpoints.
Optimize your posts and pages for the best SEO performance!
Switch your SEO plugin to DiagnoSEO and feel a positive difference!

DiagnoSEO On-page SEO

DiagnoSEO is simply the best SEO plugin for WordPress. It's the most lightweight (less than 100KB) and fastest plugin on the market (optimized for Core Web Vitals). At the same time, it's loaded with useful and unique SEO features. Moreover, it has got the most advanced content analyzer and the most accurate SEO checkpoints for the focus keyword placement. It's the first SEO plugin that supports the IndexNow. Use DiagnoSEO plugin for WordPress and rank higher in search engines!

The Best SEO Plugin for WordPress


It’s very lightweight and easy to set up. Thank you. 


Easy to Use and Setup

Powerful and lightweight SEO plugin for WordPress. The best solution on the market in 2025.

SEMrush CY LTD

For your content to be successful, it needs to be visible and engaging. SEO Writing Assistant—our smart editor tool—ensures that your text ticks both of these boxes by providing recommendations and improvements in real time.
The tool integrates seamlessly with WordPress and offers key readability and SEO suggestions based on the best-performing content in Google’s SERPs. Whether you’re writing your own copy or editing someone else’s, SEO Writing Assistant makes the end product as impactful and effective as possible—for readers and search engines.
<h3>Key Features</h3>
<ul>
<li>Readability: Use the Flesch-Kincaid score to assess and improve your text’s readability</li>
<li>Recommended Keywords: Receive semantically related keyword suggestions that can help boost your visibility</li>
<li>Tone of Voice: Ensure that your tone is smooth and consistent across your text</li>
<li>Plagiarism Check: Verify that your writer has submitted original content and avoid penalization</li>
<li>Rephraser: Rework pieces of text to improve quality, target different channels, or overcome writer’s block</li>
<li>Overall Score: Evaluate and maximize the SEO potential of your text based on key on-page factors</li>
</ul>
<h3>How Does It Work?</h3>
The SEO Writing Assistant plugin allows you to write, assess, and edit your content in WordPress.
To set it up, follow these steps:
<ol>
<li>Click “Download” at the top of this page. The plugin will automatically save as a .zip file.</li>
<li>Log in to the admin area of your WordPress account.</li>
<li>Find “Plugins” in the main menu, and click on “Add New”.</li>
<li>Find and click “Upload Plugin” at the top of the page and select the .zip file.</li>
</ol>
Once the plugin has been installed, it should be activated in your “Installed Plugins” list (if it isn’t, ensure that you do so). Go to the page or post you want to optimize and click on “Connect SEO Content Template” (you will need to be logged in to your Semrush account).
<h3>Limits</h3>
To use SEO Writing Assistant, you need to first specify your target keywords. This requires a Semrush account.
With a Free or Pro Semrush account, you can create one recommendation set (tied to a document) for a lifetime. Higher tier accounts have different keyword budgets depending on the subscription plan, as well as full access to the powerful Semrush Content Marketing Platform.
<h3>Technical details</h3>
Please be aware that the plugin uses a third-party code provided by the <a href="https://www.semrush.com/swa/" rel="nofollow ugc">Semrush SEO Writing Assistant</a> tool that is not reviewed by the WordPress team. To analyze your text, the plugin will send it to Semrush API where texts can also be stored for statistical analysis. To improve user experience, telemetry data is collected by Google Analytics.
See also
<a href="https://www.semrush.com/company/legal/privacy-policy/" rel="nofollow ugc">Semrush Privacy Policy</a> 
<a href="https://www.semrush.com/company/legal/terms-of-use/" rel="nofollow ugc">Semrush Terms and Conditions</a>

Semrush SEO Writing Assistant

The Semrush SEO Writing Assistant provides instant recommendations for content optimization based on the best-performing articles in Google's top 10.

DiagnoSEO On-page SEO vs Semrush SEO Writing Assistant