Free SEO audit: what it shows, what it misses, how to use it

What a free SEO audit can and cannot tell you, where free ends and paid begins, and how to get the most out of a free website scan in one evening.

SEO · Published: 13 October 2026 · 5 min read · Ольга Мирошник

"Free SEO audit" is one of the most overused phrases in marketing. Sometimes it means a useful automated report; often it is a lead form that ends in a sales call. Both have their place, but you should know what you are getting. This article is about the honest version: what a free SEO audit of a website can realistically find, what it never will, and how to squeeze the most out of one.

What a free audit is good at

An automated scan is excellent at anything that can be measured from the outside and expressed as a rule. On a typical site that already covers a large share of the technical SEO problems that actually cost traffic:

• missing, empty or duplicated titles, descriptions and H1s;
• canonicals that point to redirects, errors, other hosts or other languages;
• noindex on pages that should rank;
• a robots.txt that blocks too much, a sitemap that is missing, broken or full of redirects;
• a non-existent address that answers 200 instead of 404 — a soft 404;
• broken internal links, redirect chains, plain-HTTP access without a redirect to HTTPS.

None of these needs a consultant to discover. They need someone to look, and a machine looks faster.

What it cannot tell you

A free report is not an SEO strategy. It will not:

• research keywords or tell you which queries are worth targeting;
• judge whether your copy answers the searcher's question better than competitors;
• analyse backlinks, positions or traffic — that data lives in Google Search Console, Yandex Webmaster and paid link tools;
• see pages behind a login or pages nothing links to;
• decide trade-offs, such as whether thin filter pages should be merged or closed.

Read a clean report as "nothing measurable is broken", not as proof that the site will rank.

Free versus paid: where the line really is

The line is rarely about which checks run; it is about scale and depth. A free scan on SiteScan reads a handful of pages — five by default, ten at most — starting from the address you enter. That is enough to catch template-level problems, because a bug in the product template repeats on every product. Larger crawls, AI form testing and PDF export belong to the paid audit types, which run on credits that do not expire; the pricing page lists what each type includes. Paying makes sense when the site has thousands of pages with different templates, or when you need a document for a client.

How to get the most from a free scan

Scan by template, not by site. The crawl starts from the address you type, so run separate scans for the home page, a category, a product page and a blog article. Four free scans cover four templates.

Start from the top of the report. The owner summary shows the three most dangerous problems; Quick Wins rank fixes by payoff per minute of work. Our guide on interpreting the results explains scores and severities.

Check the evidence. Each finding carries the values it was raised from — the actual title, the canonical target, the status code. Verify a couple by hand before filing tickets.

Hand it over. The Copy fix brief button turns critical, high and medium findings into a task list for a developer, with an acceptance criterion: the next scan no longer reports them.

Rescan after the fix. A report is reused for fifteen minutes; after deploying, press Rescan to force a fresh crawl.

One caveat: reports appear in the public list of recent scans, so do not scan an address you would rather not see listed.

Your free SEO audit in five steps

1. Enter the domain on the home page — no sign-up.
2. Open the SEO diagnostics and the indexing checks; the factors themselves are explained in our SEO website analysis guide.
3. Repeat for each key template.
4. Copy the fix brief, fix, rescan.
5. If you outgrow ten pages, read about what else you can analyse for free or turn the one-off check into a proper website audit process. Questions about any finding are answered in the help centre.