Keyword Density Checker

What is keyword density?

Keyword density, sometimes called word density, is the percentage of times a word or phrase appears in your text relative to the total word count. If "content marketing" appears 10 times in a 500-word article, its keyword density is 2 percent. The simple keyword density formula is the number of keyword occurrences divided by total words, multiplied by 100. SEO writers use a keyword density checker to verify that their target keywords appear naturally in published content without crossing into spam territory. This page is both a keyword density checker tool and a keyword density calculator, so you can measure and double-check the numbers in one place.

How to use this keyword density checker tool

Paste your article, blog post, or landing page copy into the box above and the keyword density tool instantly tokenizes the text, counts every word and phrase, and builds a sortable table. Each row shows a keyword, its raw count, and its keyword density percentage. Switch the n-gram size to analyze single words, 2-word phrases, or 3-word phrases, and toggle the stop-word filter so common words like "the" and "and" do not dominate the results. Sort by count or by percentage to find your heaviest terms fast. Everything runs in your browser, so this word density checker works as a quick, private keyword density analyzer for any length of content.

How to calculate keyword density percentage

The keyword density percentage is straightforward to work out by hand: divide the number of times a keyword appears by the total number of words, then multiply by 100. A keyword used 8 times in a 400-word post lands at 2 percent; the same keyword in an 800-word post drops to 1 percent. This is why density always has to be read alongside word count, since a high raw count in a long article can still be a low percentage. This keyword density calculator applies the formula to every word and n-gram automatically, so you can compare terms without doing arithmetic for each one.

Is keyword density still an SEO ranking factor?

No, not directly. Google stopped using raw keyword density as a ranking signal in the early 2010s. Modern Google uses BERT and other NLP models to understand topical relevance contextually. However, keyword density analysis remains a useful diagnostic: if your primary keyword is missing or under 0.5 percent, your topic signal may be too weak. Over 3 percent and your writing usually feels forced. Treat the keyword density percentage as a health check, not a target to chase.

What is the ideal keyword density for SEO?

The widely cited guidance is a keyword density of roughly 1 to 3 percent for your primary keyword, but this is a rough heuristic rather than a rule. Some top-ranking pages sit at 0.5 percent because their topical relevance comes from related terms and synonyms. Others reach 3 percent because the keyword genuinely repeats in natural writing about the topic. Write naturally first, then use this keyword density calculator to confirm your main term is present and your supporting phrases are well distributed.

Keyword stuffing: how to spot and fix it

Keyword stuffing is the practice of cramming a keyword into a page unnaturally to manipulate rankings, and it can trigger a Google spam penalty. Use this tool as a keyword stuffing checker: if a single word or phrase shows a keyword density well above 3 to 4 percent, scan those passages for repetitive, awkward phrasing. The fix is variety. Replace some instances with synonyms, partial matches, or pronouns so the copy reads smoothly while still signaling the topic clearly.

N-grams: beyond single words

Bigrams (2-word phrases) and trigrams (3-word phrases) often reveal more SEO insight than single words. "Marketing" alone could mean anything. "Content marketing" or "social media marketing" tells Google exactly what your page covers. Use the n-gram dropdown to switch between single-word, bigram, and trigram analysis, then compare the phrase counts to see which themes your draft emphasizes most.

Why stop-word filtering matters

Without filtering, the top of any word density report is just "the", "and", "of", and "to". These stop words carry little semantic meaning and would otherwise bury your real keywords. The built-in stop-word filter removes a standard English list of around 50 common words so the keyword counter surfaces the content words that actually describe your page. You can toggle the filter off any time you want a complete, unfiltered frequency count.

Keyword density vs topical relevance

A modern SEO keyword density tool is most valuable when you stop thinking about a single number and start thinking about coverage. Search engines reward pages that cover a topic thoroughly with related terms, entities, and natural language. Use the density table to confirm your primary keyword appears, then check that supporting phrases and variations also show up. A page with healthy keyword density analysis across several related n-grams usually signals depth far better than one word repeated to hit a percentage.

Auditing competitor content with keyword density

You can paste a competitor's article into this keyword density analyzer to see which terms they emphasize and at what percentage. This is a quick way to reverse-engineer the keywords a top-ranking page targets and to find phrases you may have missed in your own draft. Compare their bigram and trigram counts against yours, then close obvious gaps without copying their structure or padding your text just to match a number.

Keyword density checker vs keyword counter

A plain keyword counter only tells you how many times a word appears, while a keyword density checker puts that count in context as a percentage of the whole document. Both numbers are useful: the raw count tells you whether a term is present at all, and the density percentage tells you whether it is emphasized appropriately for the length of the piece. This tool shows both side by side, so you get the speed of a keyword counter and the proportion view of a full keyword density analyzer in a single table.

Using the keyword density tool for on-page SEO

When you optimize a page, run your draft through this SEO keyword density tool before publishing and treat the result as a final on-page check. Confirm the primary keyword appears in the body at a natural rate, look for the supporting phrases you intended to cover, and make sure no single term is dominating the table. If your target keyword is absent from the top results, the page may not be clearly about the topic you think it is. A short, deliberate keyword density analysis at the end of editing catches both gaps and over-optimization before search engines do.

Word density for editors and academic writing

The word density checker is not only for SEO. Editors use it to catch crutch words and accidental repetition that weaken prose, and academic writers use it to confirm the central theme of an essay or paper is clearly present. Because the tool reports both single words and multi-word phrases, it surfaces repeated phrasings that are easy to miss when you are close to the text. Toggle the stop-word filter off for a raw frequency count, or leave it on to focus on the meaningful content words.

Is this keyword density analyzer free and private?

Yes. This keyword density checker is completely free with no signup, no account, and no usage limits, so you can run keyword density analysis as often as you need. It is also fully private: tokenization, counting, and the keyword density percentage calculation all happen client-side in your browser, and your text is never uploaded to a server. That makes it safe for unpublished drafts, client work, and confidential documents.