Keyword Density Checker – Words, 2-grams, 3-grams

Understanding Keyword Density

Keyword density is the percentage of times a keyword or phrase appears in a web page's text compared to the total word count. It's an important metric in Search Engine Optimization (SEO), helping content creators understand how frequently their target keywords are used.

• Healthy range: many aim ~0.5–2% for primary terms (don’t force it).
• Phrases win: check 2–3 word phrases—often better topical signal.
• Stop words: excluded from auto “Top keywords.”

Why is Keyword Density Important for SEO?

• Relevance: Search engines use keyword density as one of many signals to determine the topic and relevance of your content to a user's search query.
• Avoiding Keyword Stuffing: While including keywords is crucial, excessive use (known as "keyword stuffing") can negatively impact your rankings and readability. A keyword density checker helps you maintain a healthy balance.
• Content Quality: By analyzing keyword density, you can ensure your content naturally incorporates keywords without sounding repetitive or unnatural.

How to Use This Tool

1. Paste Your Text: Copy and paste the content you want to analyze into the "Your Text" textarea.
2. Enter Keywords (Optional): You can type specific keywords or phrases you want to check, separated by commas, into the "Keywords to Check" input field.
3. Check Density: Click the "Check Density" button. The tool will calculate and display the frequency and percentage of each keyword.
4. Auto-Detected Keywords: The tool will also automatically identify and display the top 3 most frequently used words in your text (excluding common words like "the," "is," etc.), giving you a quick overview of key themes.

How This Tool Works

This Keyword Density Checker operates entirely client-side within your browser. No data is sent to a server, ensuring your privacy. It works by:

• Word Tokenization: The tool processes your input text, breaking it down into individual words. It normalizes the text by converting it to lowercase and removing punctuation to ensure accurate matching.
• Keyword Matching: For each specified keyword, it counts the occurrences in the normalized text.
• Density Calculation: The keyword density is then calculated using the formula: $$ \text{Keyword Density} = \left( \frac{\text{Number of times keyword appears}}{\text{Total word count in text}} \right) \times 100\% $$
• Top Keyword Detection: It also counts the frequency of all words (excluding common stop words) and identifies the top 3 most frequent ones, displaying their count and density.

This approach provides instant results and keeps your content private and secure.