25 Free SEO Tools Built for Professionals

Comprehensive SEO assessment across 30 ranking factors including on-page, technical, content quality, and AIO readiness.

• 30 ranking factors
• Section scoring
• Overall grade A+ to F
• AIO readiness included

Paste HTML and get a full analysis of title tags, meta descriptions, Open Graph data, Twitter cards, and canonical tags.

• Title and description analysis
• OG and Twitter card check
• Character count warnings
• Canonical tag validation

Visualize your H1-H6 heading hierarchy. Identify missing headings, skipped levels, and accessibility issues.

• Visual heading tree
• Hierarchy validation
• Multiple H1 detection
• Skipped level warnings

Analyze word frequency and keyword density across your content. Find single words, two-word phrases, and three-word phrases.

• 1, 2, and 3-word phrases
• Target keyword tracking
• Density percentages
• Over-optimization alerts

See exactly how your page will appear in Google search results on desktop and mobile. Live character count and truncation preview.

• Desktop and mobile preview
• Live character counts
• Truncation visualization
• Real-time updates

Preview how your page looks when shared on Facebook, Twitter, LinkedIn, and in Google search results.

• Google SERP preview
• Facebook card preview
• Twitter card preview
• LinkedIn preview

Analyze content structure, heading usage, question patterns, lists, transition words, and sentence variety. Get an overall content score.

• Content score 0-100
• Structure analysis
• Question detection
• Sentence variety check

Calculate Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, Coleman-Liau, and SMOG readability scores.

• 5 readability formulas
• Grade level estimate
• Complex word analysis
• Audience recommendations

Check if your page is optimized for Google AI Overviews. Evaluates schema markup, content structure, FAQ presence, and AI-readiness signals.

• AIO readiness score
• Schema markup check
• FAQ detection
• Content structure analysis

Enter keywords and classify their search intent as informational, commercial, navigational, or transactional. Get content type recommendations.

• 4 intent categories
• Bulk keyword analysis
• Content type suggestions
• Intent distribution

Enter your LCP, CLS, and INP metrics and evaluate them against Google thresholds. Get specific optimization recommendations.

• LCP, CLS, INP evaluation
• Google threshold comparison
• Visual score gauges
• Fix recommendations

Paste HTML and analyze page weight, script count, stylesheet count, render-blocking resources, and optimization opportunities.

• Document size analysis
• Script and style count
• Render-blocking detection
• Lazy loading check

Check viewport meta tags, responsive CSS, font sizes, touch targets, and image responsiveness from your HTML source.

• Viewport validation
• Responsive CSS check
• Font size analysis
• Image responsiveness

Paste your robots.txt and validate syntax, user-agent rules, allow/disallow directives, and sitemap references.

• Syntax validation
• Rule breakdown
• Sitemap reference check
• Blocked path warnings

Paste your XML sitemap and validate structure, URL format, lastmod dates, priority values, and change frequency.

• XML structure check
• URL validation
• Date format check
• Duplicate URL detection

Analyze canonical tag implementation from HTML source. Check for missing, duplicate, relative, and mismatched canonicals.

• Canonical presence check
• Duplicate detection
• HTTPS validation
• OG URL comparison

Enter URLs in a redirect chain and visualize the flow. Detect excessive hops, protocol changes, and potential loops.

• Visual redirect flow
• Hop count analysis
• Protocol change detection
• Loop detection

Paste HTTP response headers and evaluate HSTS, CSP, X-Frame-Options, and other security headers. Get a letter grade.

• Letter grade A+ to F
• 8 header checks
• Implementation guides
• Best practice tips

Paste HTML and analyze every image for alt text, dimensions, lazy loading, file format, and file name quality.

• Alt text validation
• Lazy loading check
• Modern format detection
• File name analysis

Extract all links from HTML and categorize them as internal or external. Analyze anchor text distribution and link attributes.

• Internal vs external split
• Anchor text analysis
• Nofollow detection
• Link attribute check

Generate valid JSON-LD structured data for FAQ, Article, LocalBusiness, Product, HowTo, and more.

• 8 schema types
• Live JSON-LD preview
• One-click copy
• Google validator link

Create a standards-compliant llms.txt file to help AI models understand your website content.

• Spec compliant
• Unlimited sections
• Live preview
• AI search ready

Convert Markdown to clean, semantic HTML with a live rendered preview and raw source view.

• Live preview
• Raw HTML view
• Full GFM support
• Instant conversion

Transform HTML markup into clean Markdown. Ideal for content migration between platforms.

• Clean output
• Configurable options
• Complex HTML support
• One-click copy

Upload a PDF and extract text as clean Markdown. Runs entirely in your browser with zero server uploads.

• 100% client-side
• Drag-and-drop
• Preserves structure
• No size limit