Links and navigation
Internal Link Checker
Check on-page anchors and HTTP errors or redirects in a sample of internal targets.
- Missing on-page anchor targets
- HTTP errors in sampled internal targets
- Sampled internal target redirects
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Showing 17 of 17 tools
AI readability
llms.txt Availability Checker
Check the optional llms.txt response. This is not a full syntax validator or an AI citation test.
- Availability of the llms.txt text response
Technical SEO
Canonical URL Checker
Check canonical declarations and available target checks.
- Presence and count of canonical tags
- Valid HTTP(S) canonical URL
- Fragments in canonical URLs
- Target HTTP status when available
Technical SEO
Redirect and HTTP Status Checker
Check the final HTTP status, redirect count and a sample of internal links.
- Final page HTTP status
- Redirect count for the submitted URL
- Meta refresh redirects
- Sampled internal target redirects
Technical SEO
Hreflang Checker
Check language tags and hreflang destinations in the submitted page’s HTML.
- Language tag syntax
- Absolute destination URLs
- Duplicate language declarations
- Self-reference in the hreflang group
Content and keywords
H1–H6 Heading Checker
Check H1 headings, empty headings and heading order in HTML.
- Presence of a main H1
- Multiple H1 headings to review
- Empty H1–H6 headings
- Skipped heading levels
Links and navigation
Broken Link Checker
Check HTML links and HTTP errors in a sample of internal destinations.
- Empty href destinations
- Missing link names
- Missing on-page anchor targets
- HTTP errors in sampled internal targets
Schema and previews
Schema Markup Checker (JSON-LD)
Check JSON-LD markup on a page for free. Inspect Schema.org types, syntax errors, missing properties and the source code.
- JSON-LD parsing
- Declared entity types
- Selected fields of supported types
- Breadcrumb item positions
Schema and previews
Open Graph Checker
Check Open Graph tags and the OG image for any public URL. Preview link sharing, inspect image dimensions and find missing tags for free.
- Populated og:title
- Populated og:description
- Declared og:image
- Declared og:url
AI readability
AI Readability Checker
Check text without JavaScript, snippet directives and search crawler rules.
- Text available without JavaScript
- Text snippet restrictions
- Sections marked data-nosnippet
- Search crawler rules
Content and keywords
Keyword Relevance Checker
Compare your query with the page title, headings and content.
- Query match in the title
- Query match in the H1
- Match in the meta description
- Match in the opening content
Content and keywords
Image SEO Checker
Check alt text, image sources, dimensions and loading declarations.
- Missing alt attributes
- Declared image sources
- Dimensions in HTML and inline CSS
- Lazy loading and priority conflicts
Technical SEO
XML Sitemap Checker
Discover the site’s sitemap and check URLs and dates within the fetched scope.
- Sitemap availability and recognition
- Absolute URLs without fragments
- Duplicate entries within a file
- Valid and future lastmod dates
- Current URL in the fetched scope
Technical SEO
Indexability Checker
Check technical indexing barriers; verify actual Google indexing in Search Console.
- Noindex in HTML and HTTP headers
- Googlebot and Bingbot rules
- Declared canonical URL
- Current URL in the fetched sitemap
Technical SEO
Robots.txt Checker
Fetch the site’s robots.txt and evaluate crawler rules for the submitted page.
- Robots.txt file availability
- Rules for Googlebot and Bingbot
- Rules for AI search crawlers
- Rules for training crawlers
Content and keywords
Meta Tag Checker
Check titles, descriptions and OG tags. Preview Google, Facebook and WhatsApp, then try better copy.
- A single populated title tag
- Populated meta description
- Robots and noindex directives
- Google, Facebook and WhatsApp previews
Technical SEO
Accessibility checker
Check one public page for selected accessibility issues in its fetched HTML. Get findings grouped by WCAG principle and success criterion, with a score limited to measured checks.
- ARIA roles and names
- Labels and text alternatives
- Language and document structure
What do these tools measure?
Each tool checks the available public page data within its stated scope. Rankings, backlinks and actual Google indexing require external data. Missing measurements remain marked as unavailable or needing review.