Technical SEO crawl
Checks HTTP errors, redirect chains, robots directives, sitemap conflicts, indexability, and verified canonical targets.
Free SEO audit tool / Atlas × VOID
Free SEO audit for what search can actually reach.
Run a free website SEO checker across up to 25 representative pages. Atlas tests technical SEO crawlability, indexability, on-page signals, internal links, structured data, and AI search readiness—then reports only findings supported by observed evidence.
Free website SEO checker
What this free SEO audit checks
Atlas is a technical SEO audit tool built around inspectable evidence. It samples different URL groups instead of treating the first 25 links as the whole website, records what the crawler could and could not access, and ties every finding to the analyzed pages behind it.
On-page SEO checker
Reviews page titles, H1 headings, duplicate content signals, structured-data validity, and raw-versus-rendered content gaps.
Website architecture audit
Finds internal links that lead through redirects, point to errors, or send visitors and crawlers toward noindex pages.
AI search readiness signals
Shows whether important content and structured identity are available in raw HTML or depend on browser rendering.
Prioritized SEO findings
Orders observed issues by severity and confidence, with affected-page counts, example URLs, and a concrete retest condition.
Bounded, free site audit
Analyzes up to 25 representative pages and selectively renders up to two pages without requiring an account or payment.
How the site audit works
A technical SEO audit with explicit coverage
A quick SEO score is only useful when you can see the crawl behind it. This tool keeps discovery, analyzed-page evidence, warnings, and derived scores separate.
Explore technical SEO and AI search visibility services- 01
Enter a website URL
Submit a public homepage or canonical URL. Bare domains are normalized to HTTPS automatically.
- 02
Discover and sample pages
Atlas reads robots.txt and available sitemaps, groups discovered URLs, and selects a representative bounded sample.
- 03
Compare crawl evidence
The audit inspects fetched HTML and selectively rendered pages while recording coverage and access limitations.
- 04
Review what to fix first
The report separates observed evidence from derived scores and withholds a score when coverage is not defensible.
SEO audit FAQ
Questions about the free SEO checker
Is this SEO audit tool free?
Yes. The Atlas Site Snapshot is a free SEO audit tool for one public website at a time. It does not require an account, payment, or browser extension.
What does the website SEO checker analyze?
It checks a representative sample for crawl and indexability problems, HTTP and redirect issues, titles and H1 headings, internal-link defects, canonical errors, sitemap conflicts, invalid JSON-LD, duplicate-content signals, and content that depends on browser rendering.
How many pages does the free SEO site audit crawl?
The snapshot analyzes up to 25 representative pages and may render up to two pages in a browser. Every report states the URLs discovered, pages analyzed, valid HTML pages, and URL groups represented.
Does the audit check AI search readiness?
It checks technical prerequisites that affect search and AI systems, including crawl access, extractable HTML, structured identity, and rendering gaps. It does not claim to measure citations or rankings inside every AI answer engine.
Is this a complete technical SEO audit?
No. This is a bounded technical SEO snapshot, not an exhaustive enterprise crawl, backlink audit, rank tracker, keyword database, or Core Web Vitals lab test. Use it to find evidence-backed priorities and decide where deeper investigation is warranted.