🔎 Keyword Density Analyzer – Optimize Your Content for SEO
The Keyword Density Analyzer is a free browser-based tool that examines any block of text and calculates how frequently each word or phrase appears — and what percentage of the total word count it represents. Whether you are writing a blog post, landing page, or product description, understanding your keyword density helps you craft content that ranks well without triggering search engine penalties for over-optimization.
What Is Keyword Density?
Keyword density is the ratio of how many times a target word or phrase appears in your content compared to the total number of words. It is expressed as a percentage using the formula:
Keyword Density (%) = (Occurrences ÷ Total Words) × 100For example, if the phrase content marketing appears 4 times in a 200-word article, its density is (4 ÷ 200) × 100 = 2% — right in the sweet spot for SEO.
Recommended Keyword Density Ranges
| Density Range | Assessment | Recommendation |
|---|---|---|
| 0–1% | Low | Consider adding your keyword more naturally throughout the content. |
| 1–2% | ✅ Ideal | Optimal range for primary keywords. Signals relevance without over-optimization. |
| 2–5% | ⚠️ High | Use sparingly. Acceptable for supporting keywords, but review for natural readability. |
| >5% | 🚫 Keyword Stuffing | Reduce usage. Excessive repetition can harm rankings and reader experience. |
Single Words, Bigrams, and Trigrams
Modern SEO relies heavily on long-tail keywords — multi-word phrases that are more specific and often easier to rank for. This tool supports three n-gram modes:
- Unigrams (Single Words) — analyses individual word frequency. Best for finding over-used vocabulary and checking core keyword presence.
- Bigrams (2-Word Phrases) — identifies two-word combinations such as
keyword densityorcontent marketing. - Trigrams (3-Word Phrases) — surfaces longer phrases like
search engine optimizationthat represent high intent long-tail keywords.
Stop Word Filtering
Common words like the, and, is, and of carry little topical meaning and can distort keyword density calculations. Enabling Remove Stop Words strips these filler words before analysis, giving you a clearer view of the semantically meaningful vocabulary in your content.
Target Keyword Tracking
Enter a specific keyword or phrase in the Target Keyword field to instantly see how many times it appears and what density it achieves. The tool provides a contextual SEO recommendation — whether to add more occurrences, maintain current usage, or reduce to avoid over-optimization.
How to Use the Keyword Density Analyzer
- Paste your text into the input area. Analysis begins instantly as you type or paste.
- Choose n-gram mode — single words for broad analysis, bigrams or trigrams for phrase-level insights.
- Toggle options — enable case-insensitive mode, stop word removal, or set a minimum word length to filter noise.
- Set a frequency threshold to show only keywords that appear at least a certain number of times.
- Click column headers in the results table to sort by keyword name, count, or density.
- Export your results as a CSV file for further analysis in spreadsheet applications.
Privacy & Performance
All processing happens entirely in your browser. No text is ever sent to a server, stored in a database, or shared with third parties. Your analysis settings are saved locally using localStorage so that your preferred options are automatically restored on your next visit.