Free Keyword Density Checker

The Keyword Density Checker is a free online SEO tool that analyzes how frequently specific keywords appear in your content relative to total word count.

Yes, it is completely free with no registration required. All analysis happens client-side in your browser.

Generally, a keyword density of 1-3% is recommended for SEO. The Keyword Density Checker helps you ensure you are not over- or under-optimizing your content.

Absolutely. The Keyword Density Checker processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Keyword Density Checker is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Keyword Density Checker in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Yes, the Keyword Density Checker is built following current Google Search guidelines and best practices. We regularly update the tool to reflect changes in search engine requirements.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Keyword Density Checker works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Keyword density is the number of times a term appears in your content divided by the total word count, expressed as a percentage. For example, a keyword used 8 times in a 400-word article has a density of 8 divided by 400, which equals 2%. Multi-word phrases work the same way, counting how often the exact phrase repeats against the total. The formula is simple, but doing it by hand for every term is slow and easy to miscount, especially once you include two-, three-, and four-word phrases. This checker tokenizes your text and computes density for every single word and phrase automatically, so you instantly see which terms repeat most and what percentage each one represents. Paste your draft above to get the full frequency and density breakdown in one click.

Keyword stuffing is repeating a term so often that the text reads unnaturally and exists mainly to manipulate rankings rather than inform readers. There is no exact cutoff search engines publish, but a common rule of thumb treats a primary keyword above roughly 3% density as a warning sign of over-optimization. This tool marks the 1-2% band as optimal, flags 2-3% as a caution zone, and highlights anything higher as likely stuffing, so you can catch a term you have leaned on too hard. The better test is whether the writing still reads smoothly aloud; density is just a quick sanity check that points you to the worst offenders. Paste your content above, watch which keywords climb into the high band, and rephrase until your main term sits comfortably without sounding forced or repetitive.

Plain keyword density only measures how often a term appears relative to the total word count, so very common words can dominate the list even when they say little about your topic. TF-IDF, short for term frequency-inverse document frequency, weights each term by how distinctive it is, not just how frequent. This tool calculates it by treating your document's own paragraphs as sub-documents, so a word that clusters heavily in a few sections scores higher than one sprinkled evenly everywhere. The result highlights the terms that genuinely define what your page is about, rather than the words you simply typed most. Density tells you repetition; TF-IDF tells you topical importance, and reading them together gives a fuller picture of your content's focus. Switch to the TF-IDF ranking above to see which terms carry the most weight in your draft.

Stop words are extremely common terms like the, and, of, and to that appear constantly but carry little topical meaning. By default this checker filters out roughly a hundred of them so they do not flood your frequency list and bury the keywords that actually matter. For most SEO checks, leaving stop words excluded gives a cleaner view of your meaningful terms and phrases. There are cases where you may want them back: confirming an exact-match phrase that contains a small word, or analyzing readability and natural sentence flow where those connectors count. The tool gives you a toggle to include or exclude stop words at any time, plus a minimum word length setting to ignore short noise. Try the analysis both ways above to see how filtering changes which terms rise to the top of your report.

Where a keyword sits can signal relevance more strongly than raw frequency. A term in your title, first paragraph, or a heading tells search engines and readers what the page is about far more clearly than the same word buried deep in the body. That is why this tool includes a prominence check: it looks at whether your top keywords appear in the title line, the first paragraph, headings, and the first and last 100 words, then scores each term as high, medium, or low placement. A keyword with healthy density but weak prominence is a missed opportunity, while one stuffed into headings without supporting context can read awkwardly. Balance both: natural repetition plus thoughtful placement in the spots that carry weight. Run the prominence analysis above to see exactly where each of your key terms currently lands across the page.