What does a website SEO checker look for?

A good website SEO checker checks: (1) Meta tags — title length, description, canonical URL. (2) Page speed — LCP, CLS, INP Core Web Vitals. (3) Technical SEO — crawlability, robots.txt, sitemap, HTTPS. (4) On-page SEO — heading hierarchy, keyword usage, image alt text. (5) Structured data — JSON-LD schema markup validity. (6) Mobile usability — viewport, touch targets, font sizes. (7) AI visibility — whether GPTBot and PerplexityBot can access your site.

Is SEO-Snap a free website SEO checker?

Yes. SEO-Snap is a free website SEO checker that runs 251 checks instantly with no account required. The free audit covers technical SEO, page speed, meta tags, schema markup, mobile usability, and AI search visibility. Paid plans add weekly automated audits, PDF reports, and multi-site tracking.

How often should I check my website SEO?

Check your website SEO at least once a month — and after any major change (new pages, redesign, hosting migration, plugin updates). Many issues (broken links, crawl errors, slow pages) appear gradually and go unnoticed without regular checks. Weekly automated monitoring catches problems before they hurt rankings.

Blog/Website SEO Checker

SEO Tools

Website SEO Checker: Analyse Any Site Free in 60 Seconds (2026)

Q: What is a website SEO checker?

A website SEO checker is a tool that automatically audits a website's pages for factors that affect Google rankings. It checks meta tags, page speed, mobile usability, broken links, schema markup, canonical URLs, and more — then gives you a score and a prioritised list of issues to fix.

Q: How do I check my website SEO for free?

Go to seo-snap.com, enter your website URL, and click Run Audit. The free SEO checker scans 251 rules across technical SEO, on-page factors, performance, and AI visibility in under 60 seconds. No account or credit card required.

Q: What is a good SEO score for a website?

On a 0–100 scale: 80–100 is excellent, 60–79 is good but has room for improvement, 40–59 needs significant work, and below 40 means critical issues are likely suppressing rankings. Most sites score 50–70 on their first audit because many common issues go unnoticed without an automated checker.

A website SEO checker runs 251 automated checks — meta tags, page speed, broken links, schema markup, mobile usability, and AI search visibility — and gives you a prioritised fix list in under a minute.

July 12, 2026·8 min read

What is a website SEO checker?

A website SEO checker is an automated tool that crawls your web pages and analyses them against a set of SEO rules — checking everything Google's algorithm looks at when deciding where to rank your site.

Unlike Google Search Console (which only shows you what Google has already indexed), an SEO checker proactively finds issues before they hurt your rankings: slow pages, missing schema markup, broken internal links, thin content, missing alt text, and more.

Modern SEO checkers like SEO-Snap also check AI search visibility — whether ChatGPT, Perplexity, and Google AI Overviews can crawl and cite your site — which standard tools don't cover at all.

What does a website SEO checker check?

251 checks across 6 categories — completed in under 60 seconds.

🏷️Meta Tags

✓Title tag length (50–60 chars)
✓Meta description (150–160 chars)
✓Canonical URL set correctly
✓Open Graph + Twitter card tags
✓Robots meta (noindex detection)

⚡Page Speed

✓LCP under 2.5 seconds
✓CLS under 0.1
✓INP under 200ms
✓Image compression & formats
✓Render-blocking resources

🔧Technical SEO

✓HTTPS / SSL certificate
✓Sitemap presence & validity
✓Robots.txt accessible
✓Crawl errors & redirect chains
✓404 broken internal links

📄On-Page SEO

✓H1 present and unique
✓Heading hierarchy (H1→H6)
✓Image alt text coverage
✓Keyword in title + H1
✓Thin content detection

🗂️Schema Markup

✓JSON-LD structured data present
✓Schema type matches content
✓Required fields complete
✓Rich result eligibility
✓No conflicting markup

🤖AI Visibility

✓GPTBot access (robots.txt)
✓PerplexityBot access
✓llms.txt file present
✓AI-readable content structure
✓GEO score (0–100)

Run a free website SEO check now

251 checks in 60 seconds. No signup, no credit card, no install.

Check My Website Free →

How to check your website SEO (step by step)

Enter your URL

Paste your homepage URL (or any page URL) into the SEO checker. Use the exact URL you want Google to rank — including HTTPS and trailing slash if applicable.

Run the audit

Click "Run Audit." The checker fetches your page, analyses the HTML, tests page speed via Lighthouse, validates schema markup, and checks AI bot access — all in parallel.

Read your score

You get an overall SEO score (0–100) broken down by category: Technical, On-Page, Performance, Schema, Mobile, and AI Visibility. Each category shows pass/warn/fail status.

Fix critical issues first

Issues are sorted by severity. Fix critical issues (red) before warnings (amber). Critical issues typically include: missing title tags, broken canonical, no HTTPS, blocked crawlers, and LCP over 4 seconds.

Re-check after fixing

Run the checker again after making fixes to confirm your score improved. Google typically re-crawls within 1–2 weeks of changes — you should see ranking movement within 2–4 weeks.

Most common issues found by an SEO checker

After checking thousands of websites, these are the issues that appear most frequently — and have the biggest impact on rankings when fixed:

Missing or too-long meta title

Very commonImpact: High

Fix: Write a unique title for every page — 50–60 characters, keyword first.

No meta description

Very commonImpact: Medium

Fix: Add a 150–160 character description. Google uses it as a CTR signal even if it rewrites it.

Slow LCP (over 2.5s)

CommonImpact: High

Fix: Compress hero images, use WebP format, preload fonts, switch to a faster host.

Missing schema markup

CommonImpact: Medium

Fix: Add JSON-LD Article or Product schema. Enables rich snippets in Google results.

Images without alt text

Very commonImpact: Medium

Fix: Add descriptive alt attributes to every meaningful image. Google uses them as ranking signals.

No canonical URL

CommonImpact: High

Fix: Add <link rel="canonical"> to every page to prevent duplicate content issues.

AI bots blocked

Increasingly commonImpact: Growing

Fix: Check robots.txt — don't block GPTBot, PerplexityBot, or ClaudeBot if you want AI visibility.

Broken internal links

CommonImpact: Medium

Fix: Find and fix or redirect all internal 404s. They waste crawl budget and hurt user experience.

Website SEO checker comparison

How the main free and paid SEO checkers compare on the factors that matter most:

Tool	Checks	Speed	Price	AI Visibility	PDF
SEO-Snap	251	60 sec	Free	✓	✓ (paid)
Google Search Console	~20	24–48h	Free	✗	✗
Screaming Frog (free)	~150	5–15 min	Free (500 URLs)	✗	✗
Semrush Site Audit	~130	Hours	$130+/mo	✗	✓
Ahrefs Site Audit	~100	Hours	$129+/mo	✗	✓

Frequently asked questions

What is a website SEO checker?▼

A website SEO checker is a tool that automatically audits your site's pages for factors that affect Google rankings — meta tags, page speed, broken links, schema markup, mobile usability, and more. It gives you a score and a prioritised list of issues to fix.

How do I check my website SEO for free?▼

Go to seo-snap.com/seo-scan, enter your URL, and click Run Audit. 251 checks run in under 60 seconds — no account or credit card required.

What is a good SEO score for a website?▼

80–100 is excellent. 60–79 is good but improvable. 40–59 needs significant work. Below 40 means critical issues are likely suppressing rankings. Most sites score 50–70 on their first audit.

How often should I run an SEO check?▼

At minimum, monthly. Also run checks after any major change — new pages, redesign, plugin updates, hosting migration. Weekly automated monitoring (available on paid plans) catches issues as they appear.

Is an SEO checker the same as Google Search Console?▼

No. GSC shows what Google already knows about your indexed pages. An SEO checker proactively finds issues GSC misses: missing schema, redirect chains, slow pages, thin content, broken external links, and AI visibility gaps.

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Check your website SEO now — free

251 checks in 60 seconds. Technical SEO, page speed, schema, mobile, and AI visibility. No signup needed.

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