The Keyword Density Checker is a free SEO tool that analyzes a webpage or block of text and calculates the percentage frequency of every keyword relative to the total word count. This analysis helps you understand how prominently specific words and phrases appear in your content, which is useful for on-page SEO optimization.

Modern SEO does not target a specific keyword density percentage, but the data helps identify keyword stuffing (over-optimization) or keyword neglect (under-optimization). The ideal approach is natural, topic-focused writing that covers related terms (LSI keywords) comprehensively.

How to Check Keyword Density

• Enter a URL to analyze a live webpage, or paste text directly into the editor
• Click Analyze
• View a table of all words and phrases ranked by frequency and density %
• Toggle between single keywords, 2-word phrases and 3-word phrases

What to Look For

• Your primary keyword appearing at 1–3% density is typically healthy
• Single keyword appearing above 5% may appear spammy to search engines
• Check for natural use of related synonyms and variations
• Use results to identify missing semantic keywords in your content

Pair with our Keyword Suggestion Tool to find related terms worth adding for better topic coverage. Both tools are free, no login required.

Want to learn more? Read our complete guide: How to Check Keyword Rankings for Free →