29 Free SEO Tools for Technical and AI Search

A verified directory of working Foglift checkers, generators, and analyzers for point-in-time SEO and AI Readiness work. Product monitoring and developer-access boundaries are listed separately.

The short answer

Foglift provides 29 public browser tools for focused SEO and AI search work. Each numbered entry below opens an interactive checker, generator, analyzer, or audit route. The list no longer mixes tool labels with explanatory articles.

Start with the Technical Audit for a five-dimension baseline. Use the focused utilities to inspect individual findings, then use AI Visibility when you need recurring answer-level evidence rather than another point-in-time check.

What this free catalog covers

Audit and AI search

Technical Audit, brand checks, site comparison, and content extraction.

Content and structure

Metadata, headings, language, social previews, and structured data.

Crawling and indexing

Robots policies, sitemaps, links, and redirect behavior.

Performance and security

Speed, headers, certificates, infrastructure, uptime, and DNS.

Accessibility and media

Automated accessibility, contrast, color, favicons, and page weight.

29 working SEO and AI search tools

1.Technical AuditAudit and AI searchScore one URL across SEO, AI Readiness, performance, security, and accessibility.2.AI Brand CheckerAudit and AI searchCheck whether an AI answer mentions a brand for a specific buyer question.3.Site ComparisonAudit and AI searchCompare two URLs side by side across technical and AI Readiness signals.4.Content GEO OptimizerAudit and AI searchReview pasted copy for answer structure, specificity, and AI citation readiness.5.Meta Tag AnalyzerContent and structureInspect title, description, canonical, Open Graph, and social metadata.6.Heading AnalyzerContent and structureCheck heading order and identify missing or ambiguous page structure.7.Word CounterContent and structureMeasure word count, reading time, readability, and repeated terms.8.Keyword Density CheckerContent and structureCount term frequency and spot language that is repeated too heavily.9.Open Graph DebuggerContent and structurePreview the title, description, and image exposed to social platforms.10.Schema GeneratorContent and structureCreate JSON-LD for common Schema.org types from a guided form.11.Structured Data TesterContent and structureParse JSON-LD and surface syntax or required-field problems.12.Robots.txt GeneratorCrawling and indexingBuild crawler directives for search and AI crawler roles.13.Robots.txt TesterCrawling and indexingTest whether a user agent can fetch a path under a robots policy.14.Sitemap ValidatorCrawling and indexingValidate XML sitemap structure and inspect the URLs it exposes.15.Broken Link CheckerCrawling and indexingFind links that resolve to errors or unusable destinations.16.Redirect CheckerCrawling and indexingTrace redirect hops and identify chains, loops, or unexpected targets.17.Page Speed CheckerPerformance and securityInspect page speed signals and the resources affecting load behavior.18.HTTP Headers CheckerPerformance and securityInspect response headers, cache directives, and security controls.19.SSL/TLS CheckerPerformance and securityCheck certificate validity, protocol support, expiry, and configuration.20.Technology CheckerPerformance and securityDetect frameworks, content systems, analytics, and infrastructure signals.21.Uptime CheckerPerformance and securityTest whether a URL responds and record its response status and timing.22.DNS Record CheckerPerformance and securityLook up common DNS records used for routing, mail, and verification.23.WHOIS LookupPerformance and securityInspect available registration, registrar, and domain-date records.24.Password CheckerPerformance and securityEstimate password strength and identify common composition weaknesses.25.Accessibility CheckerAccessibility and mediaRun automated checks for common accessibility implementation problems.26.Contrast CheckerAccessibility and mediaMeasure foreground and background contrast against WCAG thresholds.27.Color PickerAccessibility and mediaChoose a color and copy its HEX, RGB, or HSL representation.28.Favicon CheckerAccessibility and mediaDiscover favicon assets and check the formats a site publishes.29.Website Carbon CalculatorAccessibility and mediaEstimate page-transfer emissions and identify page-weight tradeoffs.

Free tool access and product plan boundaries

A public tool page and an ongoing product workflow solve different jobs. This table separates the point-in-time utilities above from saved monitoring, full-site coverage, and developer automation.

Workflow	Available baseline	Boundary
Focused browser checks	The 29 public utility routes listed here	Point-in-time results
Technical Audit	Unlimited single-page audits on every plan	Launch adds weekly full-site audits for up to 100 selected pages
AI Visibility	Active Free workspaces get weekly Perplexity monitoring and on-demand checks	Launch adds all five engines and up to daily monitoring
Developer automation	Public developer documentation	REST API, CLI, MCP, and batch access begin on Launch at $49 per month

A practical workflow

Run a Technical Audit to establish one baseline across SEO, AI Readiness, performance, security, and accessibility.
Open the focused checker that matches a finding. Use the schema tester for invalid JSON-LD, the headers checker for response-policy issues, or the contrast checker for a color-pair failure.
Make one bounded change and rerun the same check. Keep the URL, timestamp, and result so you can distinguish improvement from a different test condition.
Use AI Visibility when the question becomes recurring: whether answer engines mention the brand, which sources they cite, and how that changes over time.

Frequently asked questions

Are free SEO tools enough for a small business?

Free tools are useful for focused checks such as metadata, headings, structured data, links, performance, security, accessibility, and single-page Technical Audits. They do not replace recurring rank tracking, backlink research, saved multi-page history, or multi-engine AI Visibility monitoring. Choose a paid product when the workflow needs persistence, scale, or automation rather than relying on an unsupported percentage of needs covered.

Are all 29 entries interactive tools?

Yes. Every numbered entry links to a working Foglift checker, generator, analyzer, or audit route. Explanatory articles and developer documentation appear separately so a reader is not sent to a guide after clicking a tool label.

Do these free SEO tools require a paid plan?

The 29 utility pages in this article are public routes. Account and plan controls apply when a workflow moves into saved workspace history, recurring AI Visibility, full-site audits, or developer automation. Foglift keeps those product boundaries separate from this public tool catalog.

What is GEO and why is it in an SEO tools list?

GEO, or Generative Engine Optimization, improves how clearly AI answer engines can retrieve, understand, and cite a site. The underlying work overlaps with technical SEO: crawl access, descriptive headings, structured data that matches visible content, clear entity language, and accessible pages. Foglift calls the measurable technical layer AI Readiness.

Is Foglift's REST API free?

The developer documentation is public, but REST API, CLI, MCP, and batch scanning access begin on the $49-per-month Launch plan. Foglift's Free plan includes unlimited single-page Technical Audits, active-use weekly Perplexity monitoring, and on-demand AI Visibility checks without developer access.

When should I upgrade from point-in-time SEO tools?

Upgrade when you need scheduled monitoring, saved history across many pages, multi-engine AI Visibility, larger workspaces, or automation. Foglift Launch adds all-five-engine monitoring, weekly full-site audits, REST API, CLI, MCP, and batch scanning. Growth adds faster cadence, more brands, Buyer-intent Win Rate, and larger usage limits.

Start with a full Technical Audit

Enter one URL and get current scores across SEO, AI Readiness, performance, security, and accessibility.

Run a Technical Audit

Continue from the free catalog

Fundamentals: Learn about GEO (Generative Engine Optimization) and AEO (Answer Engine Optimization) (the two frameworks for optimizing your content for AI search engines).