Keyword Density Checker
See which words and phrases appear most often and their density percentage for SEO.
Free keyword density checker
A keyword density checker analyses how often each word and phrase appears in your text and shows the result as a percentage. ProseTool's keyword density tool counts single words, two-word phrases, and three-word phrases, ranks them by frequency, and updates live as you type — entirely in your browser.
Keyword density is a useful signal for SEO and editing. It reveals which terms dominate your content, whether your target keyword appears often enough to be relevant, and whether you are accidentally repeating a word so much that it reads as keyword stuffing. Seeing the numbers helps you write naturally while staying on topic.
How to use the keyword density checker
- Paste your article or page content into the box above.
- Choose whether to analyse single words, 2-word phrases, or 3-word phrases.
- Review the ranked list of keywords with their counts and density percentages.
- Adjust your writing if any term is over- or under-used.
Features
- 1, 2, and 3-word analysis to surface both keywords and key phrases.
- Density percentages alongside raw counts for instant context.
- Stop-word filtering on single words so results highlight meaningful terms.
- Live ranking with a visual bar for each keyword.
- Private and unlimited — nothing is uploaded and there is no length cap.
Benefits of checking keyword density
Search engines reward content that covers a topic naturally and penalise pages that repeat a keyword unnaturally. A density check keeps you in the safe zone: frequent enough to be clearly about your subject, but never forced. Editors also use density to catch crutch words and unintentional repetition that weaken otherwise strong writing.
Content marketers rely on phrase analysis to confirm that the key terms they are targeting actually appear in the copy, and to discover related phrases worth emphasising. Because the tool runs locally, you can check confidential drafts without sending them anywhere.
Frequently asked questions
What is keyword density?
Keyword density is how often a word or phrase appears in your text, expressed as a percentage of the total word count. If a keyword appears 8 times in a 400-word article, its density is 2%.
What is a good keyword density for SEO?
There is no magic number, but most SEO professionals keep a primary keyword in the 0.5%–2.5% range. The goal is natural usage. Stuffing a keyword to hit a percentage reads badly and can hurt rankings.
What are 2-word and 3-word phrases?
These are n-grams — consecutive word combinations. Analysing 2-word and 3-word phrases reveals the key terms and topics in your writing, which single words alone can miss. Switch the phrase length with the selector.
Are common words ignored?
When analysing single words, very common stop words such as "the", "and", and "of" are filtered out so the results highlight meaningful terms. Phrase analysis keeps all words so the phrases read naturally.