Does keyword density matter to Google?

No, not beyond spam. Google has said there is no ideal density. What matters is that the phrase appears where it is meaningful — the title, the heading, early in the page — and that the page answers the query. This check reports density to catch stuffing, not to chase a number.

Why not give me target terms like Surfer?

Those come from a competitor set we cannot see without a SERP data licence, so we do not invent them. What we can check honestly — the phrase you target, in the placements that matter, and readability — we do.

What is a good Flesch score?

60+ is plain English most people read easily. 50-60 is a little dense. Under 50 is hard for a general audience. It is a writing signal, not a ranking one.

Does this fetch my page?

Yes, from outside your network, the way a crawler does, so it reads the raw HTML. Nothing is stored.

Does your page use the phrase it targets?

Paste a page and the keyword it should rank for. This reads the raw HTML the way a crawler does and reports where the phrase is and is not — title, H1, first paragraph, URL, alt text — plus density and readability.

Fetches the page from outside your network and reads its raw HTML. Nothing is stored.

What this checks

The placements a search engine weights: the phrase in the title, the H1, the first 100 words, the meta description, the URL, image alt text and a subheading. Then keyword density (to catch stuffing, not to chase a number) and a Flesch readability score. It does not invent "target terms" from a competitor set we cannot see — that needs a SERP data licence, so we say so instead of guessing.

Questions

Does keyword density matter to Google?: No, not beyond spam. Google has said there is no ideal density. What matters is that the phrase appears where it is meaningful — the title, the heading, early in the page — and that the page answers the query. This check reports density to catch stuffing, not to chase a number.
Why not give me target terms like Surfer?: Those come from a competitor set we cannot see without a SERP data licence, so we do not invent them. What we can check honestly — the phrase you target, in the placements that matter, and readability — we do.
What is a good Flesch score?: 60+ is plain English most people read easily. 50-60 is a little dense. Under 50 is hard for a general audience. It is a writing signal, not a ranking one.
Does this fetch my page?: Yes, from outside your network, the way a crawler does, so it reads the raw HTML. Nothing is stored.