Keyword Density Checker
Paste your content and enter a target keyword to check keyword density, spot overuse, and discover the top 1-word, 2-word, and 3-word phrases in your article. 100% client-side — nothing is sent to any server.
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What Keyword Density Tells You (and What It Doesn't)
Keyword density is not a direct ranking factor — but it is a useful diagnostic. A density below 1% may indicate the page is not clearly signalling its topic to search engines. A density above 2.5% can start to read as over-optimised. The sweet spot is natural, contextual usage within the 1–2.5% range.
Spot Keyword Stuffing Early
Check your content before publishing to catch obvious over-use that could trigger Google's spam filters and hurt your rankings.
Find Topical Gaps
The n-gram analysis surfaces your most-used phrases. If critical semantic variants are missing, you can add them naturally before publishing.
Audit Existing Content
Paste in published articles and check whether old content is under-optimised for a keyword you are trying to rank for, informing your next optimisation pass.
Keyword density quick reference
Page may lack topical clarity for the keyword.
Natural usage. Topically relevant without over-optimisation risk.
Risk of keyword stuffing penalty. Use synonyms and related terms.
How to Use This Tool
Analyse any piece of content in seconds, completely privately.
Enter Keyword
Type your target keyword. Leave blank to skip density analysis and just see n-gram frequencies.
Paste Content
Paste your article, blog post, or any text — up to 500,000 characters, enough for even very long articles.
Analyze
Click Analyze to see total words, keyword occurrences, density percentage, and status.
Review N-grams
Browse the top 10 single-word, two-word, and three-word phrases to understand your content's focus.
Frequently Asked Questions
What is keyword density?
Keyword density is the percentage of times a target keyword appears in a piece of content relative to the total word count. For example, if a 1,000-word article contains a keyword 15 times, the density is 1.5%. It is one of several on-page SEO signals that help search engines understand what a page is about.
What is a good keyword density for SEO?
A common rule of thumb is 1–2.5% keyword density, and that is the range this tool marks as good. Below 1% may mean the page does not establish clear topical relevance for the keyword. Above 2.5% risks over-optimisation that can read as keyword stuffing. Google does not publish an ideal density. Aim for natural usage — if it reads awkwardly, it is probably too frequent.
What is keyword stuffing and why is it bad?
Keyword stuffing is the practice of forcing a keyword into content far more often than natural writing would require, purely to manipulate search rankings. Google's spam policies explicitly list keyword stuffing, and pages that do it can rank lower or receive a manual action.
What are n-grams and why do they matter for SEO?
N-grams are contiguous sequences of n words from a text. Unigrams are single words, bigrams are two-word phrases, trigrams are three-word phrases. Analyzing your top n-grams reveals which concepts dominate your content — helping you identify both over-used filler phrases and opportunities to strengthen topical relevance by naturally including related terms.
Is my content sent to a server when I use this tool?
No. All analysis — word count, keyword frequency, n-gram extraction — happens entirely in your browser using JavaScript. Nothing is transmitted to any server. This makes the tool safe for confidential content, client work, or proprietary drafts.
Should I use keyword density as my only SEO signal?
No. Keyword density is one minor signal among many. Content quality, topical authority, backlink profile, page speed, Core Web Vitals, and user intent alignment matter far more. Use this tool as a sanity-check for obvious over- or under-optimisation, not as a primary ranking strategy.
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Key terms explained
Plain-English definitions from the LazySEO SEO glossary.