DiagnoSEO – Fast and Automated On-page SEO

DiagnoSEO is a performance-first SEO plugin for WordPress users who want full control without bloat.

DiagnoSEO is the lowest memory WordPress SEO plugin, confirmed by independent performance tests on WP Hive and Plugin Tests.

Built for speed, scalability, and real SEO work, DiagnoSEO stays fast even on large and complex websites. It uses minimal memory, optimized code (less than 100KB of a ZIP file), and a clean architecture designed with Core Web Vitals in mind.

This is not a plugin that adds features at the cost of performance. DiagnoSEO is built for websites where speed, control, and SEO quality actually matter.

You get predictable performance backed by 17+ years of real-world SEO experience, and a plugin especially valued by experienced SEO specialists who need advanced SEO control, predictable behavior, and a clean interface.

DiagnoSEO is also part of the DiagnoSEO SEO Software Suite, an AI-powered SEO platform with over 50 tools for audits, keyword research, competitor analysis, backlinks, and AI-assisted content workflows. The WordPress plugin works as a natural extension of this ecosystem.

Who is DiagnoSEO for? 👤

DiagnoSEO is designed for users who want ease of use, control, and performance:

• Beginners who want clear and practical SEO guidance
• Bloggers and content creators
• Small and medium-sized businesses
• WooCommerce store owners
• Developers and agencies
• SEO professionals who care about performance and advanced SEO control

The interface is clean and focused. Advanced options are available when needed, without overwhelming the user.

Why choose DiagnoSEO? ⭐

Most SEO plugins try to do everything. DiagnoSEO focuses on what actually moves the needle.

Instead of bloated dashboards and unnecessary features, DiagnoSEO helps you improve content quality, maintain full control over SEO signals, keep your website fast, and scale SEO safely as your site grows.

It is a modern, performance-focused SEO plugin for websites that need more than basic SEO tweaks.

DiagnoSEO was named a finalist at the European Search Awards 2025 in two major categories: Best SEO Software Suite and Best Software Innovation. This industry recognition underscores its innovation and effectiveness.

Core SEO Features (Free)

• Custom meta titles and meta descriptions
• Meta tag templates
• Google search snippet preview
• Meta robots control
• Custom canonical URLs
• Advanced Schema.org support
• Breadcrumbs with HTML and Schema
• Open Graph metadata and social previews
• XML sitemap
• Optimization for multiple related keywords
• SEO checkpoints and actionable on-page recommendations
• Content analyzer with keyword placement checks
• Live SEO score while editing
• Redirect attachment pages to image files
• Easy insertion of analytics and tracking codes
• Fully compatible with Multi Premium WordPress Theme

All features are built with performance and usability in mind.

WordPress SEO Audit & Checker 🔍

• See your SEO score instantly
• Find error-level issues hurting your visibility
• Discover quick SEO wins you can fix fast
• Get clear priorities on what to fix first
• Check posts, pages, products, and key SEO settings automatically in seconds

DiagnoSEO also includes a built-in WordPress SEO Audit & Checker that helps you quickly review important on-page and site-wide SEO issues directly inside WP admin. It analyzes metadata, content, structure, links, images, accessibility, schema, WooCommerce products, and product categories using WordPress and DiagnoSEO plugin data only, so you get fast, actionable SEO insights in a lightweight workflow.

Unique Pro SEO Features 🚀

DiagnoSEO Pro includes advanced SEO features rarely found in other SEO plugins. For a detailed feature comparison with other popular SEO plugins, see:
Yoast vs Rank Math vs DiagnoSEO.

Advanced Schema, E-E-A-T & SERP Enhancements

• ReviewedBy schema support for stronger E-E-A-T signals
• Post rating with stars and schema for higher click-through rates in SERPs
• SameAs schema support for better social media and brand entity connections
• LocalBusiness schema support
• Multiple Schema.org types per page

Advanced Internal Linking & Content Structure

• Anchor text control in post lists without changing H1 for better SEO and UX
• Affiliate deeplink hider – a safer alternative to rel=”nofollow” that protects internal link equity and prevents link juice leaks
• Automatic table of contents for improved UX and internal linking
• SEO Categories widget for better internal linking of nested categories

Advanced SEO Control & Privacy

• Advanced content quality checkpoints for better SEO audits
• XML sitemap with customizable filename for better privacy
• Meta referrer support for privacy and analytics control
• Performance-focused advanced options for better SEO, UX, and conversions

These features are designed to solve real SEO problems, not to inflate feature lists.

More Pro SEO Features 🔥

AI, Automation & Content Intelligence

• AI-powered meta title and meta description generator
• AI-powered comments generator
• Unlocked useful content quality and SEO checkpoints
• Related keyword suggestions based on semantics
• Internal linking suggestions

Advanced SEO Management & Indexing

• Redirection manager with 301 and 302 redirects
• IndexNow support for super-fast indexing in Bing and Yandex
• Option to change all external links to nofollow (Multisite supported)
• Google News XML sitemap
• HTML sitemap block

Content, UX & Visibility Enhancements

• Automatic table of contents and Table of Contents block
• Related & Featured posts widget
• Featured posts widget

WooCommerce & Advanced Website SEO

• Advanced WooCommerce SEO metadata
• SEO Categories widget for WooCommerce

DiagnoSEO SEO Software Suite Access

DiagnoSEO Pro extends WordPress SEO with access to professional SEO tools and workflows beyond the WordPress dashboard.

• Access to professional SEO tools from the DiagnoSEO All-in-One SEO Software Suite
• Support for SEO audits, keyword research, competitor analysis, backlinks, and content workflows
• Website crawl tool access (e.g. 404 detects and 20 more factors)
• Access to super detailed and advanced SEO Checker tool (200+ factors)
• Access to competitors analysis SEO tool (using AI and real search data)
• Designed for SEO specialists, agencies, and teams managing SEO beyond WordPress

Support & Professional Use

• Dedicated premium SEO support

Read full features list and details

AI-Powered SEO (Pro) 🤖🔥

AI-Assisted Metadata & Content Support

DiagnoSEO Pro uses the OpenAI API to generate or improve:

• Meta titles
• Meta descriptions
• Contextual comments for posts

Metadata are generated based on SEO best practices.

AI tools are designed to save time, support consistent SEO workflows, and help maintain content quality at scale.

Easy Migration 🔄

Switching to DiagnoSEO is simple and safe.

You can import SEO data from other popular SEO plugins (Yoast SEO, Rank Math, SEOPress, and many more) with no data loss and no SEO risk.

Why switch to DiagnoSEO? 🚀

If your current SEO setup feels slow, bloated, overly complex, or limiting in advanced SEO control, DiagnoSEO gives you back speed, clarity, and full control without compromising performance.

Optimize smarter.
Stay fast.
Stay in control.

Switch to DiagnoSEO and experience performance-first SEO for WordPress.