Free Website SEO Checker
Check your website's SEO score instantly. StackMap analyses title tags, meta descriptions, headings, keywords, Core Web Vitals and more — then delivers a prioritised SEO report, free.
No credit card required · Free forever · Results in seconds
Everything Our SEO Checker Analyses
From on-page basics to technical SEO and Core Web Vitals — we check everything that affects your search rankings.
On-Page SEO
- Title tag length & keywords
- Meta description optimisation
- H1 tag presence & uniqueness
- H2/H3 heading structure
- Keyword density analysis
- Keyword placement in URL
Technical SEO
- Canonical tag implementation
- XML sitemap presence
- Robots.txt configuration
- Structured data / schema markup
- Hreflang tags
- Pagination tags
Core Web Vitals
- Largest Contentful Paint (LCP)
- First Input Delay (FID)
- Cumulative Layout Shift (CLS)
- First Contentful Paint (FCP)
- Time to Interactive (TTI)
- Total Blocking Time (TBT)
Content & Links
- Image alt text coverage
- Internal link structure
- Broken link detection
- External link quality
- Content length signals
- Duplicate content flags
Indexability
- Noindex tag detection
- Crawlability checks
- Redirect chains
- 404 error pages
- Mobile-first indexing
- Page depth analysis
SEO Score & Report
- Overall SEO health score
- Category breakdown scores
- Issue severity ranking
- Prioritised fix recommendations
- Comparison to best practices
- Actionable improvement steps
Get Your SEO Report in 3 Steps
We Check Your SEO
StackMap runs a comprehensive SEO audit powered by Google's own PageSpeed API — checking every on-page factor, meta tag, and technical issue that affects your ranking. No setup, no code required.
SEO Engine Runs 30+ Checks
Our checker analyses every SEO factor: title tags, meta descriptions, heading structure, keyword usage, Core Web Vitals, schema markup, sitemaps, and more.
Get Your Free SEO Report
Receive a detailed SEO report with your score, specific issues found, their impact on rankings, and exactly which fixes will make the biggest difference.
StackMap vs. Other SEO Checkers
| Feature | StackMap | GTmetrix | Google PageSpeed | Paid Tools ($29-$99/mo) |
|---|---|---|---|---|
| Full SEO Analysis | — | — | ||
| Core Web Vitals | ||||
| Technical SEO Checks | — | — | ||
| On-Page SEO Score | — | — | ||
| Security & Accessibility | — | — | ||
| Prioritised Fixes | — | — | ||
| Price | $0 | Free / $13+/mo | Free | $29–$99/mo |
SEO Checker Questions Answered
What does a website SEO checker look for?
A website SEO checker analyses on-page factors (title tags, meta descriptions, headings, keyword usage), technical SEO (canonical tags, sitemap, robots.txt, schema markup), Core Web Vitals performance scores, internal/external links, and image optimisation.
How accurate is StackMap's SEO checker?
StackMap uses Google Lighthouse data combined with our own proprietary SEO checks. Results align with what Google's crawlers actually evaluate, giving you an accurate picture of your SEO health.
Is this SEO checker really free?
Yes — completely free. StackMap automatically discovers new products and sends founders a free SEO report with no credit card required and no time limits.
How do I improve my website's SEO score?
Your StackMap SEO report prioritises issues by impact. Common quick wins include writing unique title tags and meta descriptions, adding your target keyword to the H1, fixing missing image alt text, and ensuring your site loads in under 2.5 seconds.
What is a good SEO score?
Scores above 90 are excellent, 75–90 are good, 50–75 need improvement, and below 50 have significant issues. StackMap shows your score alongside specific items to address.
Does page speed affect SEO?
Yes — Google uses Core Web Vitals (LCP, FID, CLS) as a direct ranking factor. Slow sites rank lower. StackMap's SEO checker includes your full Core Web Vitals breakdown and specific recommendations to improve them.
How often should I check my website SEO?
After any significant site changes (new pages, redesigns, plugin updates). StackMap tracks your website over time so you can re-run your SEO check and compare scores after making improvements.
Can I check my SEO on mobile?
StackMap's checker evaluates both mobile and desktop performance. Given Google's mobile-first indexing, the mobile score is especially important for rankings.
Ready to check your SEO? It's 100% free.
Get your SEO score and a prioritised list of exactly what to fix to rank higher.
Get Your Free SEO ReportNo credit card required · Free forever · Results in seconds