Keyword Density Analyzer

Analyze keyword frequency as a percentage

Updated June 25, 2026

What is the Keyword Density Analyzer?

Keyword Density Analyzer helps you measure how often words and phrases appear in a block of text and shows each one as a percentage of the analyzed content. It is useful for SEO audits, blog editing, landing page reviews, and spotting keyword stuffing before publishing. The tool runs entirely in the browser, so you can paste content and get instant results without uploads, logins, or network requests. What it checks Single-word frequency. Phrase frequency for multi-word terms. Density percentage for each result. Stop-word filtering to reduce noise. Case sensitivity and accent normalization controls. When to use it Use it when you want to understand which terms dominate a page, whether your target keyword appears enough, or whether repeated phrasing is making the copy feel unnatural. It is especially helpful for content writers, SEO specialists, and frontend teams reviewing marketing pages before launch. Example If a 500-word article uses the phrase keyword density 10 times, the density for that phrase is 2%. That makes it easy to compare repeated terms across drafts and decide whether the copy needs trimming or better keyword distribution.

Keyword Density Analyzer breaks your text into tokens, filters them, counts repeated terms, and converts those counts into density percentages. Analysis flow The tool reads the text you paste into the input area. It normalizes the text based on your settings, such as case sensitivity and accent handling. It splits the text into words or phrases. It removes stop words when filtering is enabled. It counts each unique term and calculates density using the total analyzed token count. It sorts results by frequency and displays the top matches. Density formula Density is calculated as: (occurrences \div total analyzed tokens) \times 100 For example, if a keyword appears 8 times in 400 analyzed words, its density is 2%. Why filters matter Stop words like the, and, and of often dominate raw results even though they do not help with SEO analysis. Filtering them out reveals the terms that carry more meaning in your content. Phrase analysis Phrase mode is useful when you want to see repeated combinations such as React development, keyword density, or content optimization. Instead of only checking isolated words, it highlights recurring patterns that can show topical focus or overuse. Output The tool shows a ranked table with each term, its count, and its density percentage. You can also copy the results as CSV for reports, audits, or content workflows.

Check the most repeated words and phrases in a draft article.

SEO tools help writers analyze keyword density and avoid keyword stuffing in blog content.

Top terms like seo, keyword, density, and content appear with counts and percentage density.

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Our React development services help startups build fast React websites and scalable React apps.

The phrase React development and the word React stand out with higher density.

Remove common stop words and focus on meaningful keywords.

The and of in a page are common words, while keyword density and analysis matter more.

Common stop words are reduced so keyword density and analysis become more visible.

What is keyword density?

Keyword density is the percentage of times a word or phrase appears in a text compared with the total number of analyzed tokens.

Why use a keyword density analyzer?

It helps you see which terms dominate your content, which can be useful for SEO audits, editorial cleanup, and finding overused phrases.

Does this tool support phrases?

Yes. You can analyze single words or multi-word phrases, which helps you review recurring keyword patterns beyond one-word frequency.

What are stop words?

Stop words are very common words such as the, and, or, and of. They usually add grammatical structure but little SEO value, so filtering them can make results clearer.

Can I use this for keyword stuffing checks?

Yes. Repeated terms with unusually high density can indicate keyword stuffing or over-optimized copy, especially when the same phrase appears too often.

Does the analyzer work offline in the browser?

Yes. The tool is client-side only, so your text stays in the browser while you analyze it.

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