Keyword Density Analyzer Script – Semantic Density Checker

How the Keyword Density Analyzer Works

Paste your draft into the editor and the tool tokenizes the text, counts single words and two-word phrases, and reports each as a share of total word count. Modern search systems understand topics and synonyms, so density is a guardrail rather than a target: the analysis exists to show when a term is so repetitive that the text reads as spam.

There is no magic percentage. As a practical rule, if your primary phrase appears naturally it usually lands between 0.5% and 2.5%; anything pushing past 4% on a short page is worth rewriting. Use the phrase tabs to compare your primary keyword against secondary variations.

When to Use This Tool

• Before publishing: catch accidental over-optimization that could read as keyword stuffing to both users and search quality systems.
• During content briefs: check that secondary keywords actually appear in the draft at meaningful (but natural) levels.
• Auditing existing pages that plateaued: unnatural density from old-school optimization is a common cause.