Free SEO checkers,
one for every aspect

Pick a specific checker — title, meta description, canonical, broken links, and more — all free and no sign-up

Each checker runs one specific check. For a full report, try our site audit or page audit

Indexing

How your page is discovered and indexed by search engines.

Meta robots

Check if the page is blocked from indexing via meta robots or X-Robots-Tag.

robots.txt

Verify that robots.txt is accessible and doesn't block important pages.

sitemap.xml

Check sitemap availability, format, and URL count.

Canonical

Check the canonical tag and whether it points to the correct URL.

HTTP → HTTPS

Verify that HTTP traffic is redirected to HTTPS.

www redirect

Check whether www and non-www versions redirect to one canonical host.

Server 404

Check that the server returns a proper 404 for non-existent URLs.

Meta tags & content

Page meta information and the structure of its content.

Title tag

Check the title tag presence, length, and uniqueness vs H1.

Meta description

Verify the meta description is present and within recommended length.

Headings H1-H6

Check the heading hierarchy and verify H1 is used correctly.

Open Graph

Validate Open Graph tags for social sharing previews.

Schema.org

Detect JSON-LD, Microdata, or RDFa structured data on the page.

Character encoding

Check that encoding is declared and UTF-8 is used.

Viewport

Verify the viewport meta tag is set for mobile devices.

Images

Image format, accessibility, and performance.

Image format

Check whether modern formats like WebP and AVIF are used.

Alt tags

Find images missing descriptive alt attributes.

Lazy loading

Verify that images below the fold are lazy-loaded.

Favicon

Check the favicon loads and is ready for Google Search results.

Performance

Page size, compression, and rendering speed.

Compression

Check whether gzip or Brotli compression is enabled.

HTML size

Find out if the HTML document is too heavy.

Render-blocking JS

Find JavaScript files loaded without async or defer.

URL structure

Check URL length, case, and special characters.

Security

HTTPS, headers, and secure content delivery.

SSL certificate

Verify the SSL certificate, expiry date, and issuer.

HSTS

Check for the Strict-Transport-Security header.

Mixed content

Find HTTP resources loaded on HTTPS pages.