Free SEO Tools
Every free SEO tool you need to audit, optimize, and outrank competitors — meta tags, schema, sitemaps, headings, mobile readiness, social previews, and keyword research.
20 tools in this category · 100% free · No signup
All SEO Tools
Meta Tags Analyzer
Extract and analyze every meta tag from any URL.
Open →Heading Hierarchy Analyzer
Audit H1-H6 structure for SEO and accessibility issues.
Open →Schema Markup Validator
Extract and validate JSON-LD schema from any page.
Open →Open Graph Inspector
Preview how a URL appears on Facebook, Twitter, and LinkedIn.
Open →Sitemap Inspector
Analyze any XML sitemap — URL count, lastmod, structure.
Open →robots.txt Inspector
Parse robots.txt and flag common mistakes.
Open →Page Word Count
Count visible words on any URL.
Open →Image Alt Text Auditor
Find every image missing alt text on a page.
Open →Internal Link Map
Map every internal link on a page with anchor text.
Open →Broken Link Checker
Test every link on a page for broken status codes.
Open →Keyword Density Analyzer
Analyze keyword density and frequency in any text.
Open →Canonical Tag Checker
Check the canonical URL of any page.
Open →SERP Preview Tool
Preview how your page appears in Google search results.
Open →Title Tag Length Checker
Check title length in pixels and characters.
Open →Meta Description Checker
Check meta description length and preview.
Open →Twitter Card Validator
Validate Twitter Card meta tags on any URL.
Open →LinkedIn Share Preview
Preview how URLs appear when shared on LinkedIn.
Open →Mobile-Friendly Checker
Test if any page meets mobile-friendly standards.
Open →XML Sitemap Generator
Build a custom XML sitemap for your site.
Open →Keyword Suggestion Tool
Generate related keyword ideas from any seed phrase.
Open →What makes a complete SEO toolkit?
Effective SEO requires checks at five layers — technical foundations (canonical tags, robots.txt, sitemap.xml), on-page signals (title, meta description, headings, schema), content quality (keyword density, word count, reading time), social-graph optimization (Open Graph, Twitter Cards, LinkedIn), and mobile readiness (viewport, tap targets). Each tool on this page targets exactly one of those layers. Used together, they cover everything Google's quality guidelines evaluate.
How to use these tools in an SEO audit
Start with the Meta Tags Analyzer and Schema Validator to confirm the basics are present and well-formed. Run the Canonical Tag Checker on five representative URLs to catch accidental duplicates. Use the Sitemap Inspector to verify your sitemap.xml is reachable and lists every URL Google should index. Check the Mobile-Friendly Checker on three different page templates. Finally, run the Keyword Density Analyzer on your highest-traffic posts to ensure they're optimized without keyword-stuffing — Google's algorithms penalize unnatural density above ~3%.
Why these run in your browser, not as paid SaaS
Most SEO tools are paid subscriptions — but the core technical checks (parsing HTML, validating schema, counting words) are deterministic operations that don't need a backend or proprietary data. We run them server-side only when the tool needs to fetch a URL on your behalf (e.g., to check headers or follow redirects), and client-side for everything else. No login, no rate limit, no dashboard — just the answer.