Keyword Density Checker
Analyze keyword frequency and density in any text to optimize content without over-stuffing.
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What is Keyword Density Checker?
Keyword density measures how often a specific keyword or phrase appears in a piece of content relative to the total word count, expressed as a percentage. While the era of exact-percentage keyword density targets is long past (and keyword stuffing is actively penalised), understanding keyword frequency remains important: too little use of your target term may result in Google not recognising your topical relevance, while too much use looks unnatural and can trigger spam filters. Most SEO practitioners today aim for natural language usage where the primary keyword appears a few times and related terms (LSI keywords) appear throughout the content. This tool analyses any text — pasted directly or fetched from a URL — to show keyword frequency, density percentages, and a word cloud of the most prominent terms, helping you verify that your content focuses on the right topics without over-optimisation.
How to Use Keyword Density Checker
- 1
Paste Text or Enter URL
Either paste your content directly into the text box or enter a webpage URL to fetch and analyse the live page content automatically.
- 2
View Keyword Analysis
See a ranked table of all keywords by frequency and density percentage. Filter by minimum occurrences to focus on significant terms.
- 3
Check Target Keywords
Enter your specific target keywords to see exactly how many times and at what density they appear — with a gauge indicating whether usage is too low, ideal, or potentially over-optimised.
Use Cases
Pre-Publishing Content Review
Before publishing a new page, check that your primary keyword and semantic variations appear at natural frequency. If your target keyword appears only once in 1,500 words, you may want to work it in more naturally. If it appears 20 times, you risk over-optimisation penalties.
Competitor Content Analysis
Enter a competitor's URL to see which keywords dominate their top-ranking content. Understanding what terms they emphasise (and at what frequency) gives you a benchmark for how to approach the same topic in your own content strategy.
Content Audit and Refresh
When refreshing old content that has dropped in rankings, use the keyword density checker to compare the current content against a target keyword list. Often, pages lose rankings because a topic shift in the content has reduced the frequency of relevant terms that originally earned the ranking.
Features
Single and Multi-Word Analysis
Analyses single keywords, two-word phrases (bigrams), and three-word phrases (trigrams) separately — essential for identifying how long-tail terms appear in your content.
Stop Word Filtering
Automatically filters out common stop words (the, and, is, in, etc.) so your results show meaningful keywords rather than grammatical noise.
Density Percentage Display
Shows each keyword's count, percentage of total words, and a visual density bar — making it easy to spot which terms dominate your content.
Word Cloud Visualisation
Generates a visual word cloud where larger words appear more frequently — a quick visual check that your content is focused on the right topics.
Frequently Asked Questions
There is no universal ideal density percentage. Google does not publish a target number, and SEO experts have moved away from density-based thinking entirely. Modern SEO focuses on topical relevance and natural language: your primary keyword should appear in the title, H1, first paragraph, and naturally throughout the content. A 1–2% density is often cited as a general guideline, but content reading naturally and covering a topic comprehensively is more important than hitting any specific number. Use density as a sanity check, not a target.
Keyword stuffing is the practice of unnaturally repeating a keyword in content (e.g. "Our plumber London services offer the best London plumber rates from our London plumber team") to try to game rankings. Google detects it through natural language processing — an algorithm trained on billions of pages can recognise when a document's keyword repetition exceeds what would occur in natural human writing. Penalties range from lower rankings to manual actions. Write for humans; if a sentence sounds awkward with the keyword, use a synonym or restructure the sentence.
LSI (Latent Semantic Indexing) keywords are semantically related terms that naturally co-occur with your primary keyword. For a page about "coffee brewing", LSI keywords might include "espresso", "French press", "grind size", "extraction", and "barista". Including these related terms helps Google understand your content's topical depth. However, "LSI keywords" as a strict concept is somewhat outdated — Google's NLP has moved well beyond simple keyword co-occurrence. The practical advice is: cover your topic comprehensively and naturally, which will automatically include relevant semantic terms.
Keywords in H1 and H2 headings carry somewhat more SEO weight than the same keywords in body text, because headings signal topic structure and hierarchy. Your primary keyword should appear in your H1. Secondary keywords or topic variations work well in H2 subheadings. However, avoid forcing keywords into headings unnaturally — a heading's primary function is to help readers navigate content, and keyword insertion should feel natural rather than contrived.
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