Meta Tag Checker
Check title tag and meta description length, relevance, and SERP readiness.
Analyze title tags and meta descriptions instantly. Improve CTR and fix missing or weak metadata.
Run free check →Free SEO Tools
20 fast, free checkers for technical and on-page SEO. Paste any public URL and get actionable fixes in seconds — built for founders, marketers, and lean teams.
Sitemap Validator
Validate XML sitemap URLs, basic structure, and discoverability issues.
Validate XML sitemaps and spot crawlability issues quickly. Improve search engine indexing.
Run free check →Robots.txt Tester
Test robots.txt directives to avoid blocking important pages from crawlers.
Test robots.txt rules and identify indexing blockers before they hurt rankings.
Run free check →Canonical URL Checker
Detect canonical tags, self-referential issues, and duplicate canonical targets.
Check canonical link tags on any page to avoid duplicate content and indexing confusion.
Run free check →Hreflang Checker
Count and list hreflang alternates for international SEO.
Quickly audit hreflang alternate links and spot missing x-default or reciprocal issues.
Run free check →Schema / JSON-LD Checker
Find JSON-LD blocks and validate basic parseability.
Detect structured data scripts and catch invalid JSON-LD that blocks rich results.
Run free check →Open Graph Checker
Audit og:title, og:description, og:image, and related Open Graph tags.
Improve social previews on Facebook, LinkedIn, Slack, and more with complete OG tags.
Run free check →Page Word Count
Estimate visible word count and reading depth for a URL.
Measure approximate word count from page body text for content depth and thin content checks.
Run free check →Viewport Meta Checker
Verify mobile viewport meta tag presence and common configuration.
Check viewport meta tags for mobile SEO and responsive rendering.
Run free check →Twitter Card Checker
List twitter: card, title, description, and image meta tags.
Audit Twitter/X card tags for better link previews.
Run free check →Favicon Checker
Detect favicon and touch icon link tags on a page.
See which favicon and app icon links are declared for browsers and SERPs.
Run free check →Heading Outline Checker
Count H1–H4 tags to spot missing structure or multiple H1s.
Quick heading hierarchy counts for on-page SEO structure.
Run free check →Internal / External Link Checker
Approximate internal vs external link counts on a page.
Balance internal linking vs outbound links for crawl and trust signals.
Run free check →Image Alt Coverage
Share of images with non-empty alt text.
Measure alt attribute coverage for accessibility and image SEO.
Run free check →Noindex Meta Checker
Detect robots noindex directives in meta tags.
Spot accidental noindex meta tags that block indexing.
Run free check →HTML Lang Attribute Checker
Read the root html[lang] value for language declaration.
Validate html lang attribute for international SEO and accessibility.
Run free check →DOCTYPE Checker
See if a standards mode HTML5 doctype is present.
Quick check for HTML5 doctype at the start of the document.
Run free check →Resource Hints Checker
Count dns-prefetch, preconnect, preload, and prefetch link tags.
Audit resource hints that can improve LCP and connection setup.
Run free check →Meta Robots Content Checker
Surface meta name=robots content values.
Inspect meta robots directives such as noindex, nofollow, and max-snippet.
Run free check →Redirect / Status Checker
HTTP status and final URL after following redirects.
Check final HTTP status and landing URL after redirects.
Run free check →Free SEO tools for founders and marketers
Haakons SEO offers 20 single-page checkers you can run without installing software. Each tool fetches a public URL and reports on one slice of technical or on-page SEO — meta tags, crawl controls, structured data, social previews, and more.
Use them before a launch, after a migration, or when a page mysteriously stops ranking. For full-site audits, content clusters, and AI-powered briefs, create a free dashboard account.
Popular checks
- Meta Tag Checker
Check title tag and meta description length, relevance, and SERP readiness.
- Sitemap Validator
Validate XML sitemap URLs, basic structure, and discoverability issues.
- Robots.txt Tester
Test robots.txt directives to avoid blocking important pages from crawlers.
- Canonical URL Checker
Detect canonical tags, self-referential issues, and duplicate canonical targets.
- Hreflang Checker
Count and list hreflang alternates for international SEO.
- Schema / JSON-LD Checker
Find JSON-LD blocks and validate basic parseability.
When to use these tools
- After changing themes, CMS plugins, or robots.txt on production
- When Search Console shows indexing or canonical issues on specific URLs
- Before paid campaigns — verify titles, OG tags, and redirect chains on landing pages
- To benchmark competitors’ metadata and page structure without a paid crawler seat
Frequently asked questions
- Are these SEO tools really free?
- Yes. Each checker runs on a URL you provide. We may ask for an email to send deeper recommendations; full multi-page audits and ongoing monitoring live in the dashboard.
- Do I need an account?
- No account is required for the quick checks on this page. Sign in when you want saved history, scheduled crawls, Search Console integration, and AI content briefs.
- How is this different from Ahrefs or Semrush?
- These tools answer focused questions about one URL at a time — fast and free. Enterprise suites cover backlinks, keyword databases, and rank tracking at scale. Many teams use both: our checkers for spot fixes, premium tools for market research.