DiagnoSEO – Fast and Automated On-page SEO vs MerchantStamp Catalog Audit for WooCommerce

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.

MerchantStamp Catalog Audit is the AI-readiness layer for WooCommerce catalogs. It helps merchants audit catalog quality, enrich missing product schema, and publish AI-ready feeds — without replacing their existing SEO or feed plugin. Unlike traditional feed plugins focused on channel exports, this plugin focuses on catalog completeness and machine readability for modern AI-driven discovery. Fully functional, free, and offline-first This plugin is 100% functional locally. Every feature listed below runs on your server with no external service required. There is no time limit, no product cap, no locked feature behind a license key. Full ShopScore audit (no product limit) Field Coverage Analytics Top Issues panel (the fields with the most missing values, ranked) Prioritized Recommendations (actions ranked by estimated ShopScore gain) JSON-LD enrichment on top of Yoast, Rank Math, or native WooCommerce products.jsonld feed (schema.org Product catalog) llms.txt feed (LLM-friendly catalog summary) acp.json feed (Agent Commerce Protocol) agent.json feed (with SHA-256 content-integrity proof) Scan history archive (60 most recent scans) Score Trend sparkline Compare any two scans (delta score, delta critical missing, per-field coverage diff) Degradation alerts (banner when ShopScore drops or critical-missing rises) Automatic feed rebuild on product create / update / delete / stock change WooCommerce admin dashboard Full HPOS compatibility Optional external service The plugin can optionally connect to the MerchantStamp service for capabilities that genuinely require a centralized backend. The plugin works entirely without it. What the service adds (Guideline 6 — Serviceware): Centralized multi-site dashboard — manage catalog quality across multiple WooCommerce stores from one place Cross-site verification key — published at merchantstamp.com/.well-known/keys/ , referenced inside agent.json so AI agents can verify the integrity of your published feed against a public key you control Storefront discovery loader — a small JavaScript snippet (versioned, SRI-protected, opt-in) injected in the footer that helps AI agents find this site’s feeds at scale Advanced alerting — Slack and email delivery of degradation alerts, beyond the in-admin banner that this plugin shows for free Push notifications to your MerchantStamp dashboard after each rebuild Pricing for the MerchantStamp service is at merchantstamp.com. Built to work alongside your stack Yoast SEO / Yoast WooCommerce SEO Rank Math / Rank Math PRO AIOSEO Google for WooCommerce Product Feed PRO for WooCommerce Any WooCommerce-compatible theme If another plugin already outputs valid schema, this plugin does not overwrite it. It fills missing fields only. Read-only by design This plugin does not rewrite your WooCommerce product catalog. It reads your product data, computes scores, enriches structured output at render time, and generates feed files from existing catalog data. External services This plugin connects to MerchantStamp services only when the user enters an API key. Without an API key, no external connection is ever made. When a user enters a MerchantStamp API key, the plugin connects to: 1. MerchantStamp Activation & Push API Endpoint: https://merchantstamp.com/api/webhooks/plugin Purpose: Validate the API key on activation, and report feed-build status after each rebuild so the merchant’s MerchantStamp dashboard stays in sync. Data sent: site URL, plugin version, WordPress version, WooCommerce version, the merchant’s chosen slug, public feed URLs, total product count, average ShopScore, build duration in milliseconds, and a UTC timestamp. No personal data, customer data, or order data is ever sent. Terms of service: https://merchantstamp.com/en/legal Privacy policy: https://merchantstamp.com/en/privacy 2. Optional Storefront Loader Script URL: https://merchantstamp.com/js/silver-loader.v1.0.0.js Purpose: A small JavaScript file injected in the site footer (only when an API key is entered AND the filter msca_inject_loader is true) that helps AI discovery systems find this site’s published feeds. Source code: https://github.com/arnaud-92/silver-loader Subresource Integrity: loaded with an SRI hash so the browser refuses to execute any modified copy. Opt-out: site owners can disable the loader injection at any time by adding the following filter: add_filter( ‘msca_inject_loader’, ‘__return_false’ ); Privacy Without an API key entered, this plugin sends no data to any external service. With an API key, the plugin sends only operational metadata listed in the External services section above. No customer data, order data, email addresses, IP addresses, or other personal information is collected, stored, or transmitted by this plugin. All generated feed files contain only public product information already published on the merchant’s WooCommerce store. Plugin settings are stored in the standard WordPress options table; no custom database tables are created. Scan history and cache are stored under wp-content/uploads/merchantstamp-catalog-audit/private/ (created with index.php silencers and .htaccess denial rules).