An SEO audit tool scans your website and checks it against search engine best practices. It looks at things like title tags, meta descriptions, heading structure, broken links, page speed, and technical setup. The goal is to find issues that could be hurting your search rankings and give you a clear list of what to fix.

Yes, completely free. There's no trial period, no feature limits, and no account required. You can run as many audits as you want, export results, and crawl up to 10,000 pages per sitemap — all without paying anything.

For most websites, running an audit every two to four weeks is a good habit. If you're actively publishing new content, redesigning pages, or making technical changes, audit more frequently. After any major site update, it's worth running a quick check to make sure nothing broke.

No tool or fix can guarantee rankings — anyone who says otherwise isn't being straight with you. But fixing technical SEO issues removes barriers that prevent Google from properly crawling and indexing your site. It's one of the most impactful things you can do, alongside creating quality content and earning backlinks.

They're closely related but slightly different. An SEO audit is a technical check — it scans your site for specific issues like broken links, missing tags, and performance problems. SEO analysis is broader and includes things like keyword research, competitor comparison, and content strategy. Fast Site Check focuses on the audit side: finding and fixing concrete technical problems.

Yes. You can enter any publicly accessible URL. This is useful if you're doing competitor research, auditing a client's site, or just curious about how another site is doing. The audit only reads publicly available information — it doesn't access anything private.

If you enable sitemap crawling, the tool can process up to 10,000 pages per audit. You can also manually enter multiple URLs or import them from a text file. There's no hard limit on how many audits you can run per day.

Each page gets a score from 0 to 100 based on how many SEO checks it passes. A score above 80 generally means the page follows most best practices. Below 60 usually means there are issues worth fixing. The score helps you prioritize which pages need the most attention.

The audit checks for a viewport meta tag and responsive setup, which are key indicators of mobile-friendliness. It also flags missing image dimensions that can cause layout shifts on mobile devices. For a full mobile rendering test, you'd want to combine this with Google's own mobile-friendly testing tools.

Paid tools like Semrush and Ahrefs offer broader features — keyword tracking, backlink databases, rank monitoring over time. Fast Site Check focuses specifically on on-page and technical SEO auditing. It's the perfect complement to those tools, or a strong standalone option if you need a quick, free site health check without a subscription.