Content Tools

On-page content tools describe what a page actually says and how it is structured. They are diagnostic instruments — useful for catching problems, misleading if you optimise directly for their numbers.

Numbers that are not targets

Keyword density has no ideal figure. It was a meaningful signal in the early 2000s; modern search engines use semantic analysis and rank on relevance and helpfulness. Use the Keyword Density Checker to catch accidental over-repetition, not to hit a percentage. Deliberate repetition to game rankings is keyword stuffing, which Google names explicitly as a spam policy violation.

Word count is not a ranking factor. Google has confirmed this repeatedly. The correlation between long articles and good rankings reflects that thorough coverage tends to need more words, not that length itself helps. Word Count for SEO also reports readability: a Flesch Reading Ease score of roughly 60 to 70 is plain English for a general audience, and shortening sentences is the single most effective way to improve it.

Structure genuinely matters

The Heading Hierarchy Checker catches skipped levels — jumping from H2 to H4 breaks the document outline that screen reader users navigate by. Choose heading levels for structural meaning and control size with CSS; picking H4 because you want smaller text is the most common cause of a broken outline.

The Slug Generator produces URL paths. Use hyphens rather than underscores, since Google treats a hyphen as a word separator and an underscore as a joiner, and force lowercase because URL paths are case-sensitive on most servers. If you change an existing slug, always add a 301 redirect, or you discard the ranking signals its inbound links carried.