Keyword density checker tools calculate how often each word or phrase appears in a text relative to total word count. This free browser-based SEO keyword checker highlights over-optimized terms and helps you find keyword gaps before publishing. No signup required. Paste any content and get a ranked frequency breakdown instantly.
SEO Keyword Checker is a free browser-based tool that analyzes any text and calculates the frequency and density of each word or phrase as a percentage of total words. Use it to verify that your primary SEO keyword appears consistently throughout the content, catch over-optimization before publishing, and ensure the page covers its topic with appropriate depth. The SEO keyword checker displays the most frequent terms ranked by density, filtered to exclude common stop words so only meaningful content keywords appear in the results. Ideal for blog posts, landing pages, product descriptions, and any SEO-sensitive content. No account or upload required — all analysis runs locally in your browser. As part of a broader workflow, Meta Tag Generator can generate complete meta tag sets for SEO, Open Graph Preview can preview how pages appear when shared on social media, and Robots.txt Generator can generate robots.txt files to control search engine crawling.
SEO Keyword Checker goes beyond basic keyword counting — it provides a full word frequency analysis useful at every stage of the content writing and editing workflow. For content writers, the frequency breakdown reveals whether a draft is repetitive or whether the primary SEO keyword appears enough times to clearly signal the page topic. For editors, the data surfaces overused filler words and phrases that should be varied for readability. For SEO practitioners, the checker verifies that the primary keyword and its semantic variants appear naturally throughout the content, without the artificial repetition that modern search algorithms penalize as keyword stuffing. The general SEO guidance is that a primary keyword should appear in the title, first paragraph, at least one heading, and naturally throughout the body — without targeting a specific percentage. A keyword density of 1% to 2% in a 1000-word article is typical for high-quality ranked content; densities above 3-4% are a potential over-optimization signal. SEO Keyword Checker filters common English stop words (the, and, is, of, etc.) by default, so the results show only meaningful content terms. Everything runs in the browser — no upload, no account, no install.