Free SEO tools for the weeks before you launch

What these are for

Advance Preview is a board of products that have not shipped yet. Founders here have the same problem in the same order: the page is live, nobody can find it, and the reason is usually one specific mechanical thing rather than a strategy failure.

These tools find that thing. They are free because the board is the product — there is no upsell inside a result, no gate, and no email capture.

How they work

• We fetch only the URL you paste, plus a few well-known paths on that host, such as /robots.txt, and a HEAD request to its www or apex twin (retried once as a GET if the server refuses HEAD). Nothing else — the methodology lists every request.
• Every check is server-rendered. The tools work with JavaScript switched off.
• Nothing is stored about the sites you check, and results are never indexed.
• Every rule is sourced. Of the 87 tokens in the crawler registry, 69 are robots.txt tokens the operator publishes on its own page, and each row records what that page says about robots.txt — including when it says nothing; the other 18 are marked unofficial because the operator publishes no robots.txt token for them — the string is an observed user-agent, and the registry notes say what the operator does state. The registry as a whole was last updated 2026-09-02 and is downloadable under CC BY 4.0 — so you can check our work rather than take it on trust.

Full methodology — what we fetch, what we do not, and where each rule comes from.