SEO Unmasked 作者： ArchitW

SEO Unmasked - The Ultimate Free SEO Extension

SEO Unmasked is a 100% free, 100% local on-page SEO analyzer that runs entirely in your browser. Get instant, comprehensive SEO insights without paywalls, subscriptions, or sending data to external servers.

Why Choose SEO Unmasked?

• 100% Free Forever — No premium tiers, no hidden paywalls, no account creation required. Full access to all features immediately.
• 100% Local & Offline — All analysis runs in your browser. Zero external API calls, zero data sent to servers. Your data never leaves your device.
• All-in-One On-Page SEO Tool — From keyword analysis to schema generation, from PAA research to technical audits — everything you need in one place.
• Privacy First — We track zero logs, store zero data externally, and never sell your information. What happens in your browser stays in your browser.

Unique Features

PAA Scraper (People Also Ask)

Extract questions directly from Google Search Results. Research what your audience is asking and create content that answers their queries.

Schema Wizard

Generate production-ready JSON-LD structured data through a guided interface. Create Schema for Products, Reviews, FAQs, Articles, and more — no coding required.

Keyword Analysis

• Primary keyword identification with relevance scoring
• Keyword density calculator
• Placement breakdown (title, URL, meta, headings, alt text)
• Secondary keywords discovery

Run History

Track your SEO progress over time. Each run saves your score locally, so you can see improvements or regressions with delta comparisons.

Multi-Site Dashboard

View and manage all your analyzed websites in one place. Compare scores across domains, access previous reports, and monitor overall SEO health.

Core On-Page Analysis

Instant SEO Score

Get immediate A-F grades across Technical (50pts), Content (25pts), Performance (15pts), and Social (10pts) metrics. Know your page health at a glance.

Technical Health

• Meta tags (title, description, robots, canonical)
• H1-H6 heading hierarchy with tree visualization
• Language attribute and hreflang detection
• XML Sitemap detection and analysis
• Robots.txt rules extraction

Content & Keywords

• Word count and readability scoring
• Keyword density and placement analysis
• SERP Preview (Desktop & Mobile) with accurate pixel truncation
• Social tags (Open Graph, Twitter Cards)

Links & Images

• Internal vs external link separation
• Broken link detection (batch HTTP checking)
• Nofollow, sponsored, and UGC attribute detection
• Image alt text audit
• Lazy loading and tracking pixel detection

Advanced Technical Features

• Core Web Vitals — LCP, CLS, and INP metrics captured directly from the page
• HTML vs DOM Diff — See exactly how much content JavaScript adds after initial load
• Redirect Chain Tracing — Follow redirects up to 10 hops with full status code visibility
• X-Robots-Tag Detection — Check HTTP headers for indexing instructions
• JSON-LD Schema Viewer — Syntax-highlighted code viewer with rich snippet type detection (Product, Review, FAQ, Recipe, Event, Organization, and more)

Export & Integration

• Export data as JSON or CSV
• Generate formatted SEO reports
• Copy individual data points to clipboard
• Sticky panel mode for in-page analysis

Browser Support

Available for Google Chrome and Mozilla Firefox.

Install SEO Unmasked Today

No sign-ups. No subscriptions. No data collection. Just powerful, instant SEO analysis — completely free.