Your Complete SEO Audit,
Explained
InstaRank SEO runs 100+ in-depth audits across Technical SEO, On-Page SEO, Off-Page signals, and AI optimization. Here's exactly what each one does and why it matters.
Technical SEO Audits
The foundation of every high-ranking website. Technical SEO ensures search engines can crawl, index, and understand your site without friction.
Robots.txt Analysis
Crawl directives & access rules
Validates your robots.txt file for syntax errors, conflicting rules, missing sitemaps, and blocked resources. Checks if important pages are accidentally disallowed from Googlebot.
- Syntax validation
- Googlebot access rules
- Sitemap declaration
- Blocked resources detection
LLMs.txt Analysis
AI agent content map (ChatGPT / Claude)
Validates /llms.txt across 14 spec-grade parameters — H1 + blockquote, markdown link integrity, AI bot accessibility, robots.txt cross-checks. Includes an AI-powered generator that crawls your site and produces a spec-conformant llms.txt.
- 14-parameter spec check
- AI-powered generator
- Cross-checks with robots.txt
- GPTBot/ClaudeBot/PerplexityBot accessibility
XML Sitemap
Sitemap presence, structure & validity
Checks for sitemap existence, valid XML structure, correct URL formatting, lastmod accuracy, and submission status. Flags pages missing from sitemap or URLs returning errors.
- Sitemap existence
- XML structure validation
- URL count & errors
- lastmod accuracy
Canonical URL
Duplicate content signals
Detects missing, self-referencing, and cross-domain canonical tags. Identifies canonical chains and conflicts that split PageRank across duplicate pages.
- Missing canonicals
- Canonical chains
- Cross-domain canonicals
- Self-referential tags
HTTP Status
4xx/5xx errors & redirect chains
Crawls your site to detect 404 errors, server errors (5xx), redirect chains, redirect loops, and slow-loading pages. Prioritizes issues by their SEO impact.
- 404 detection
- Server errors (5xx)
- Redirect chains
- Redirect loops
URL Structure
Clean, SEO-friendly URL patterns
Analyzes URL length, special characters, dynamic parameters, keyword presence, and directory depth. Flags URLs that violate Google's URL best practices.
- URL length checks
- Special character detection
- Parameter analysis
- Keyword in URL
Mixed Content Detector
HTTP resources on HTTPS pages
Scans for HTTP images, scripts, stylesheets, and iframes loaded on HTTPS pages — a security and ranking issue that triggers browser warnings and degrades trust.
- HTTP images on HTTPS
- Insecure scripts
- Mixed iframes
- Browser warning triggers
X-Robots-Tag
Server-level crawl control headers
Checks HTTP response headers for X-Robots-Tag directives. Detects pages unintentionally blocked with noindex, nofollow, or noarchive at the server level.
- noindex via HTTP header
- nofollow detection
- noarchive flags
- Googlebot-specific rules
Internal Links Analysis
Site structure & link equity flow
Maps your internal link graph to identify orphan pages, link equity leaks, over-linked pages, and broken internal links that hurt crawlability and PageRank distribution.
- Orphan pages
- Link equity distribution
- Broken internal links
- Anchor text diversity
Page Speed
Core Web Vitals & performance scores
Uses Google PageSpeed Insights API to measure LCP, CLS, FID/INP, TTFB, and overall performance scores. Provides specific fix recommendations for each failing metric.
- Core Web Vitals (LCP, CLS, INP)
- Mobile & desktop scores
- Performance bottlenecks
- Fix recommendations
On-Page SEO Audits
On-page factors tell Google what your content is about. These audits ensure your content, metadata, and signals are fully optimized for your target audience.
Meta Tags Analysis
Titles, descriptions, OG & Twitter tags
Audits title tags (length, keyword presence, uniqueness), meta descriptions (length, CTR optimization), Open Graph tags, Twitter card tags, and robots meta directives across all pages.
- Title tag length & uniqueness
- Meta description optimization
- Open Graph completeness
- Twitter card tags
Content Quality Scorer
Readability, depth & uniqueness scores
Evaluates content length, readability (Flesch-Kincaid), heading structure (H1-H6 hierarchy), keyword coverage, duplicate content, thin content, and content freshness signals.
- Word count & depth
- Readability scoring
- Heading structure (H1-H6)
- Thin & duplicate content
Keyword Research & Analysis
Keyword density, targeting & opportunities
Identifies primary and secondary keywords, analyzes keyword density, flags over-optimization (keyword stuffing), and surfaces missing keyword opportunities for your content.
- Primary keyword detection
- Keyword density analysis
- Stuffing detection
- LSI keyword opportunities
E-E-A-T Evaluation
Experience, Expertise, Authoritativeness, Trustworthiness
Scores your site's E-E-A-T signals: author bio presence, credentials, About page quality, contact information, privacy policy, SSL, editorial standards, and external mentions.
- Author credentials
- About & contact pages
- Trust signals (SSL, policies)
- Editorial standards
External Links
Inbound link analysis & quality
Analyzes all external links pointing into your pages, checking for broken links, redirect chains, nofollow attribution, anchor text distribution, and linking domain authority.
- Broken external links
- Redirect chains
- Nofollow attribution
- Anchor text distribution
Off-Page SEO Audits
Off-page signals build authority and trust. These audits reveal how your site is referenced, linked to, and mentioned across the web.
Outbound Links
Link quality, relevance & risk
Analyzes all outbound links for broken destinations, spammy targets, missing nofollow on paid/affiliate links, redirect chains, and topical relevance to your content.
- Broken outbound links
- Spammy link detection
- Nofollow compliance
- Topical relevance
Backlinks Quality Analysis
Referring domains, authority & toxicity
Pulls your backlink profile and scores it by referring domain authority, anchor text distribution, toxic link detection, link velocity trends, and industry relevance.
- Referring domain authority
- Toxic backlink detection
- Anchor text analysis
- Link velocity trends
Social Media Signals
Social presence & engagement signals
Checks your social media presence across major platforms, validates Open Graph and Twitter card tags, detects social sharing signals, and analyzes brand consistency.
- Platform presence check
- OG & Twitter card tags
- Social sharing signals
- Brand consistency
AI & Trust Audits
The new frontier of SEO. AI search engines and spam filters evaluate your site differently — these audits keep you ahead of both.
LLM Optimization
AI & ChatGPT visibility scoring
Evaluates how well your content is optimized for AI-generated answers in ChatGPT, Google AI Overviews, Perplexity, Gemini, Claude. Checks answer-readiness, FAQ markup, structured data, and E-E-A-T for AI.
- AI answer-readiness
- FAQ & structured data
- GEO optimization score
- AI overview compatibility
Spam Score
Spam risk detection & trust signals
Analyzes 30+ spam signals including link profile quality, content duplication, keyword stuffing, thin content patterns, domain age, and suspicious anchor text ratios.
- 30+ spam signals
- Link profile quality
- Thin & duplicate content
- Domain trust factors
Research & Tracking Tools
Go deeper than a one-time audit. Research keywords, analyze competitors, and track your rankings over time.
Keyword Research
Discover high-value keyword opportunities with search volume, competition data, and SERP analysis. Find content gaps, compare against competitors, and build data-driven content strategies.
- Search volume & competition
- SERP analysis
- Content gap discovery
- Google Ads keyword data
Competitor Analysis
Compare your SEO performance head-to-head with competitors. Analyze their keyword rankings, backlink profiles, content strategies, and technical health to find your competitive advantage.
- Head-to-head comparison
- Keyword overlap analysis
- Backlink gap detection
- Content strategy insights
Ranking TrackerComing soon
Track your keyword rankings over time. Monitor position changes, spot ranking drops before they become problems, and measure the impact of your SEO improvements.
- Daily position tracking
- Ranking change alerts
- Historical trend charts
- Competitor rank comparison
Ready to run all 100+ audits?
The full Website Audit runs all of them simultaneously. Completely free.
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Features FAQ
Common questions about what InstaRank SEO checks and how the tools work.
How many SEO audits does InstaRank SEO run?
InstaRank SEO runs 100+ individual audits across 23 categories — Technical SEO (robots.txt, sitemaps, canonical URLs, HTTP status, URL structure, mixed content, X-Robots-Tag, internal links, page speed), On-Page SEO (meta tags, content quality, keywords, E-E-A-T), Off-Page signals (backlinks, outbound links, social), and AI search optimization. Every audit runs on any URL for free.
Are all the features really free?
Yes. Every audit and tool on this page runs free, no credit card. A paid InstaRank Pro plan ($79/mo) adds saved projects, scheduled re-audits, white-label reports, and API access — but the audit itself is always free.
What's the difference between the audit and the tools?
The audit analyzes a URL you already have — it crawls your site and scores its technical, on-page, off-page, and AI-readiness health. The tools (Keyword Research and Competitor Analysis) help you plan ahead: find keyword opportunities and benchmark competitors before you publish.
Does InstaRank SEO check AI search optimization?
Yes. The LLM Optimization and Spam Score audits evaluate how ready your content is to be cited in AI answers — answer-readiness, FAQ markup, structured data, and E-E-A-T signals — so you can rank in ChatGPT, Google AI Overviews, Perplexity, Gemini, Claude, not just Google's blue links.
Can I run all the audits at once?
Yes. The full Website Audit runs every audit category simultaneously through a parallel crawler, so you get a complete 100+ point report in seconds rather than running each checker one at a time.
Do I need to install anything?
No. InstaRank SEO runs entirely in your browser — there's no extension, desktop app, or code snippet to install. Paste any URL and the audit starts immediately.