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MSEO Merlin

The SEO plugin that works with Yoast and RankMath — not against them.

BUILT BY DEVEBO · MMXXVI
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Features · Index

43 checks. 37 fixes. Documented to the line.

Every check has a rationale. Every auto-fix has a preview and an undo. No black boxes.

01Technical

Technical

13 CHECKS

Crawlability, indexability, render path, performance signals.

01Robots directivesAUTO-FIX
02Canonical tagsAUTO-FIX
03XML sitemap validityREVIEW
04hreflang consistencyAUTO-FIX
05Mobile responsivenessAUTO-FIX
06Core Web Vitals signalsREVIEW
07404 chainsAUTO-FIX
08Redirect loopsAUTO-FIX
09HTTPS enforcementREVIEW
10Schema validityAUTO-FIX
11Open Graph completenessAUTO-FIX
12Twitter card tagsREVIEW
13Render-blocking resourcesAUTO-FIX
02Content
beforeafter

Content

12 CHECKS

Heading hierarchy, meta descriptions, keyword positioning, readability.

01Title length & uniquenessAUTO-FIX
02Meta description lengthAUTO-FIX
03H1 presenceREVIEW
04Heading hierarchyAUTO-FIX
05Keyword in first paragraphAUTO-FIX
06Image alt textREVIEW
07Internal link anchor diversityAUTO-FIX
08External link rel attrsAUTO-FIX
09Content thinnessREVIEW
10Duplicate content fingerprintsAUTO-FIX
11Reading levelAUTO-FIX
12TOC for long contentREVIEW
03Links
CSVPDFXLS

Links

9 CHECKS

Internal graph, broken links, anchor diversity, depth from home.

01Internal broken linksAUTO-FIX
02External broken linksAUTO-FIX
03Anchor text diversityREVIEW
04Orphaned pagesAUTO-FIX
05Click depth from homeAUTO-FIX
06Outbound link qualityREVIEW
07Reciprocal link patternsAUTO-FIX
08Footer link bloatAUTO-FIX
09Sitewide link sanityREVIEW
04AI Readiness

AI Readiness

9 CHECKS

GEO / AEO / AIO — structured signals AI engines actually consume.

01Article schema depthAUTO-FIX
02FAQ schema presenceAUTO-FIX
03HowTo schema validationREVIEW
04Author entity markupAUTO-FIX
05Citation-friendly structureAUTO-FIX
06Answer-first paragraphsREVIEW
07Definition blocksAUTO-FIX
08Comparison tablesAUTO-FIX
09Entity disambiguationREVIEW

Try it on your worst client site.

Free forever. No credit card. Installs in under a minute.

Start Free Audit →
Final word

Your site has SEO problems
right now.

Find them in 90 seconds. Fix the auto-fixable ones in another two minutes. Free forever.

Start Free Audit →or browse the docs first
Free forever · No credit card · Installs in under a minute