Features That Go Beyond the Surface

Built for technical SEO specialists, developers, and agencies who need real data, not just pretty dashboards.

Enterprise-Grade Architecture

Black SEO Analyzer is built with Rust for blazing-fast performance and rock-solid reliability. No more waiting for slow crawls or dealing with crashes on large sites.

Lightning-Fast Performance

  • • Asynchronous architecture with Tokio runtime
  • • Configurable concurrent requests (default: 20)
  • • Smart rate limiting to respect server resources
  • • Memory-efficient processing for massive sites

Flexible Output Formats

  • • JSON/JSONL for API integration
  • • XML for enterprise systems
  • • CSV for spreadsheet analysis
  • • Beautiful HTML reports with custom templates

Multi-Strategy Crawling Engine

Stop missing critical issues on JavaScript-heavy sites. Our hybrid crawling approach ensures nothing slips through the cracks.

HTTP-Based Crawler

Lightning-fast HTTP crawling for static content. Perfect for traditional websites and server-rendered pages.

Browser-Based Crawler

Headless Chrome integration for SPAs. Accurately analyze React, Angular, Vue.js, and other JS frameworks.

Sitemap Processing

Automatic XML sitemap parsing and intelligent URL extraction. Start from sitemaps for comprehensive coverage.

10+ Specialized SEO Analysis Modules

Content Analysis

  • Word count and content depth analysis
  • Keyword density calculations
  • Flesch-Kincaid readability scoring
  • Duplicate content detection
  • Heading structure (H1-H6) validation
  • Content-to-HTML ratio analysis

Metadata & Structured Data

  • Title tag optimization analysis
  • Meta description validation
  • Open Graph & Twitter Cards
  • Schema.org markup validation
  • JSON-LD, Microdata, RDFa support
  • Canonical URL verification

Technical SEO

  • URL structure analysis
  • HTTPS/SSL certificate monitoring
  • Redirect chain detection
  • XML sitemap validation
  • Robots.txt compliance
  • Internal/external link analysis

Performance & Web Vitals

  • Core Web Vitals (LCP, FID, CLS)
  • First Contentful Paint (FCP)
  • Time to Interactive (TTI)
  • Resource loading analysis
  • Critical rendering path
  • Caching strategy validation

Vector-Based Semantic Analysis

Discover content insights that other crawlers can't provide. Our semantic analysis engine uses machine learning to understand your content at a deeper level.

Content Similarity Detection

Find semantically similar pages that might be cannibalizing each other's rankings. Goes beyond exact matches to identify conceptually similar content.

  • • Configurable similarity thresholds
  • • Cross-page similarity matrix
  • • Duplicate content beyond exact matches

Relevance Scoring

Identify pages that drift from your site's main theme. Perfect for finding content that needs refocusing or removal.

  • • Site-wide content centroid analysis
  • • Thematic alignment scoring
  • • Content clustering opportunities

Multi-Provider Embedding Support

OpenAI

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Google Gemini

text-embedding-004 with task optimization

Ollama

Local embedding generation for privacy

AI-Powered Strategic Insights

Multi-Provider AI Support

Anthropic Claude

Advanced reasoning and nuanced SEO analysis

OpenAI GPT

Comprehensive content optimization suggestions

Google Gemini

Multi-modal analysis and strategic insights

DeepSeek

Specialized technical SEO recommendations

AI-Driven Features

Custom Prompt Templates

Tailor AI analysis to your specific needs and industry

Meta Tag Generation

AI-powered title and description optimization

Content Gap Analysis

Identify missing topics and content opportunities

Competitive Analysis

Strategic insights based on market positioning

Built for Professional Workflows

Command-Line First

Built for terminal warriors. Integrate into CI/CD pipelines, cron jobs, and automated workflows seamlessly.

Custom HTML Templates

Generate branded reports with your own HTML templates. Full control over styling and presentation.

Internationalization

Multi-language support with built-in translations. Analyze international sites with hreflang validation.

Ready to See What You've Been Missing?

Stop settling for surface-level SEO data. Get the deep, actionable insights your sites deserve.