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Keyword Density Checker — Instant Keyword Analysis Right in Your Browser Stop guessing how often your target phrase appears in your article. Keyword Density Checker is a lightweight Chrome extension that analyzes any text and shows you exactly which words and phrases dominate it — in under a second, with no server, no signup, and no copy-pasting into external websites. This keyword density checker is the fastest way to see whether your content is optimized or over-optimized without leaving your current tab. HOW IT WORKS Paste your article, landing page copy, product description, or blog draft into the input box and click Analyze — or just keep typing, because the keyword density checker recalculates results live as the text changes. The tool counts every word, builds a frequency table, and displays the top 20 keywords with three columns: the keyword itself, how many times it occurs, and its density as a percentage of the total word count. A summary line shows total words and unique words at a glance. Click Copy table and the full report lands on your clipboard as tab-separated values, ready to paste into Google Sheets, Excel, or a client report. KEY FEATURES Instant analysis — no latency, no network request, the keyword density checker works fully offline and never communicates with external servers. Phrase length control — switch between single words, 2-word phrases, and 3-word phrases with one click. The keyword density checker handles long-tail keyword research just as easily as single-term counting. Stop word filtering — a built-in list of about 120 common English stop words is filtered out by default, so the table shows the terms that actually matter for SEO instead of grammar glue. Density percentages — every keyword comes with a density value calculated to two decimal places, so you can check your text against the commonly recommended 1-2% range and spot keyword stuffing before a search engine does. Live recount — results refresh as you type or edit, turning the keyword density checker into a real-time writing companion while you rework a paragraph. One-click copy — export the whole top-20 table to your clipboard as TSV without selecting any text manually. Word statistics — total word count and unique word count are always visible, useful for content briefs that specify article length. Zero permissions — the keyword density checker requests no access to your browsing data, open tabs, history, or any website you visit. WHO IS IT FOR SEO specialists who audit landing pages and need a fast keyword density checker to verify that target terms appear often enough — but not so often that the page risks a penalty. Copywriters who receive briefs demanding a specific keyword frequency and want to confirm the numbers before delivery. Content marketers comparing their draft against a top-ranking competitor page to understand which phrases carry the topic. Bloggers polishing posts for search visibility without paying for a heavyweight SEO suite. Editors checking that a writer has not stuffed the same phrase into every sentence. If you write or optimize content regularly, this keyword density checker belongs in your toolbar. PRIVACY FIRST Keyword Density Checker requests zero browser permissions. It cannot inject scripts into web pages, cannot read your browsing history, cannot access your open tabs, and cannot see anything you do outside the extension popup. Every calculation of the keyword density checker runs inside the popup window using pure JavaScript — your text is never sent to a remote server. The extension works locally, no data is collected, and it contains no analytics code, no advertisement libraries, and no third-party SDKs. Your drafts are yours alone. WHY DENSITY STILL MATTERS Modern search engines read context, but keyword frequency remains a basic sanity check: if your main phrase never appears, the page cannot rank for it; if it appears in every sentence, the page reads like spam. A keyword density checker gives you the objective numbers in seconds, so you can make an informed editorial decision instead of guessing. GETTING STARTED Pin the Keyword Density Checker icon to your Chrome toolbar. Click it, paste your text, pick 1-word, 2-word, or 3-word mode, and read the table. Copy the results if you need them elsewhere. The whole flow takes under ten seconds. Install the keyword density checker now and turn every draft into measurably optimized content.