Keyword Density Checker (Advanced)

What is healthy keyword density?

Keyword density is one of the oldest signals in search engine optimisation, and it still matters today — just not in the way most people think. The idea is simple: out of every 100 words on your page, how often does your focus keyword actually appear? For most blog posts and landing pages, a comfortable range is between 0.5% and 2.5%. Anything below that and Google may not be sure what your page is really about. Anything above 3% and you start to sound robotic, which today's algorithms are very good at spotting and quietly punishing.

Why phrases matter more than single words

Search has moved far beyond matching single words. People now type long, conversational queries like "best running shoes for flat feet under 100" rather than just "shoes". That is why this checker breaks your text into single words, two-word phrases (bigrams) and three-word phrases (trigrams). The two- and three-word lists are usually where your real SEO opportunities live. If your page targets "online notepad" but the phrase only appears once or twice, search engines have very little context to work with. Strengthening that exact phrase — naturally, inside real sentences — often moves the needle more than any other on-page change.

Reading the SEO status indicator

When you fill in a focus keyword, the tool labels it as Underused, Healthy or Over-optimised. Underused means your topic is barely mentioned, so a reader (and Google) may struggle to tell what the page is for. Healthy means your phrase appears often enough to feel intentional but not forced. Over-optimised is the danger zone — it signals stuffing, which can trigger ranking drops or even manual penalties. The fix is rarely to delete instances of your keyword; it is usually to expand the surrounding text with related ideas so the density falls back into a natural range.

Customising stopwords

Stopwords are common filler words like "the", "and", "is" and "of" that appear in almost every sentence. By default they are filtered out so they do not dominate your top-phrase results. But every niche has its own filler. A site about cooking probably wants to ignore "recipe", an e-commerce store may want to remove "buy" or "shop", and a multilingual site might add Spanish or Hindi stopwords. The custom stopword editor on this page lets you add or remove any word you like, and your list is saved in your browser for next time.

A practical workflow

Paste your draft, type your target phrase into the focus box, and read the status. If it says Underused, find two or three places where your keyword would fit naturally — usually inside subheadings, the introduction and the closing paragraph. If it says Over-optimised, swap a few mentions for synonyms or pronouns and add a couple of explanatory sentences. Re-check, and aim for the green Healthy band. Do this once per article and you will write content that ranks well without ever feeling forced.

Private and instant

Your text never leaves your browser. There is no upload, no account and no tracking — which makes this tool safe for unpublished drafts, internal documents and client work you cannot share with third-party SEO platforms.