⭐ Starlight Tools / Keyword Density Checker

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.

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.