SEO Tools

Free Keyword Density Checker Online

Analyse keyword frequency, density and n-grams in your content. Get readability scores, highlight keywords in context, and export results to CSV.

Target Keyword / Phrase

N-gram Analysis

Include stop words

Your Content

0 words

Content Stats

Words

Characters

Sentences

Paragraphs

How to Use the Keyword Density Checker

Paste your content

Paste your full article or page content in the text area. Stats update instantly. Click Load Sample Article to demo with example text.

Enter target keyword

Type your target keyword or phrase to see exactly how many times it appears and its density percentage with a status indicator.

Switch n-gram tabs

Toggle between 1-word, 2-word and 3-word analysis to find over-repeated phrases you might have missed.

Highlight & export

Toggle keyword highlight to see context. Export your results as CSV for content audit spreadsheets.

❓ Frequently Asked Questions

What is a good keyword density percentage?+

Around 0.5–2.5% for a primary keyword is a healthy range — present enough to be clear, low enough to avoid stuffing penalties. This checker grades every keyword against that range and flags missing, low and high automatically.

What is keyword density and why does it matter for SEO?+

Keyword density is the percentage of times a target keyword appears in content relative to total word count. It signals to search engines what topic a page covers. Modern SEO focuses on natural usage rather than hitting specific percentages — Google understands topical relevance without exact keyword repetitions.

What is the ideal keyword density percentage?+

Most SEO professionals suggest keeping primary keyword density between 1% and 2% for natural-sounding content. Below 0.5% the keyword may not appear prominently enough. Above 3% risks appearing as keyword stuffing, which Google penalises with ranking demotions. Use our density bar to stay in the green zone.

What is an n-gram in keyword analysis?+

An n-gram is a contiguous sequence of n words. A 1-gram (unigram) is a single word. A 2-gram (bigram) is a two-word phrase like 'keyword density'. A 3-gram (trigram) is three words like 'free seo tools'. Analysing bigrams and trigrams reveals repeated phrases that individual word analysis would miss.

What is the Flesch Reading Ease score?+

The Flesch Reading Ease score (0–100) measures how easy a piece of text is to read. Scores above 60 are considered standard or easy. Scores below 30 are very difficult. For general web content, aim for 60–70. Blog posts and marketing copy perform best between 65–80.

What is keyword stuffing and how do I avoid it?+

Keyword stuffing is unnaturally repeating a target keyword to manipulate rankings. Signs include a density above 3%, forced keyword insertion that disrupts reading flow, and keywords in every sentence. Google penalises this. Write naturally and use semantic variations and related terms instead.

How Keyword Density & N-Gram Frequency Analysis Improve On-Page SEO

Keyword density measures how frequently a specific word or multi-word phrase (n-gram) appears in an article relative to the total word count, expressed as a percentage: (Keyword Count ÷ Total Words) × 100. In early search engines, repeating an exact keyword dozens of times could artificially boost rankings; today, Google's natural-language ranking systems penalize unnatural repetition ('keyword stuffing') while rewarding comprehensive topical coverage.

Analyzing 1-word (unigram), 2-word (bigram), and 3-word (trigram) frequencies remains one of the fastest ways to audit your draft before publishing. If your primary target keyword sits below 0.5%, your H1, intro paragraph, or subheadings may not clearly signal the page's core topic; conversely, if a single phrase exceeds 2.5–3%, replacing repetitive instances with natural synonyms and related entities will improve both readability and search performance.

PursTech's Keyword Density Checker automatically filters out common English stop words (such as 'the', 'and', 'with') so you see the true topical signal of your draft in real time.