Free Keyword Density Checker

Guide

How to Check Keyword Density

From paste to full SEO analysis in seconds

1

Paste Your Content

Paste any text — a blog post, landing page copy, article, or product description. The analysis starts immediately.

💡 For the most accurate SEO analysis, paste only the body content — exclude navigation, sidebars, and footer text.

2

Enter Your Target Keyword

Type your primary target keyword in the 'Target Keyword' field to see its specific density, count, and SEO status highlighted.

💡 Check both the single-word and multi-word versions of your keyword — e.g., both 'SEO' and 'keyword density' for a keyword density article.

3

Review the Analysis

Browse the 1-word, 2-word, and 3-word frequency tables. Check for green (optimal), yellow (warning), and red (stuffing) indicators.

💡 Pay attention to 2-word and 3-word phrases — accidental phrase repetition is harder to spot than single-word overuse.

Features

Complete Keyword Analysis in One Tool

1-word, 2-word, and 3-word analysis with SEO scoring, stuffing detection, and actionable recommendations.

1-Word Keyword Analysis

Complete frequency table of every single word in your text — sorted by count and percentage. Stop words excluded for a clean, meaningful analysis.

2-Word Phrase Analysis

Bigram frequency table showing every two-word phrase and its density. Essential for finding accidentally over-used two-word keyword combinations.

3-Word Phrase Analysis

Trigram frequency table for three-word phrases. Key for long-tail keyword density analysis and ensuring natural phrase distribution.

Target Keyword Spotlight

Enter your specific target keyword to see its exact density, count, and SEO status — with a clear green/yellow/red traffic-light indicator.

SEO Traffic-Light Scoring

Every keyword gets a green (optimal), yellow (too low), or red (too high / stuffing risk) status based on SEO best practices.

Keyword Stuffing Detection

Automatically flags any keyword or phrase exceeding 3% density — the threshold where Google's algorithms start to identify unnatural keyword usage.

Density Percentage

Precise density percentage calculated as (keyword count ÷ total words × 100) — the industry-standard formula used by all major SEO tools.

Copy & Export Report

Copy the full keyword density report to clipboard or download as a text file — ready to share with clients or include in an SEO audit report.

Benchmarks

Keyword Density Benchmarks

What the numbers mean for your SEO

0.5–2.5%

Optimal

The industry sweet spot for primary keywords. Natural, helpful content typically falls in this range.

Recommendation

Maintain this level. Ensure keyword usage feels natural — if you're thinking about density, you're probably fine.

SEO Tips

Keyword Density SEO Recommendations

Expert guidance for optimizing keyword usage in your content.

Primary Keyword: 1–2% Density

high priority

Your main target keyword should appear naturally 1–2 times per 100 words. For a 1,000-word article, that's 10–20 mentions. This range feels natural to readers and signals relevance to search engines without triggering stuffing filters.

Use Cases

Who Uses the Keyword Density Checker

From bloggers to SEO consultants — anyone who creates content for search engines.

Blog Post Optimization

Content Writing

Check that your blog post's primary keyword appears naturally at 1–2% density. Identify any accidentally over-used phrases that might trigger stuffing penalties.

Client SEO Audits

SEO Consulting

Quickly audit a client's existing content for keyword stuffing issues. The visual traffic-light system makes it easy to present findings to non-technical clients.

Competitor Content Analysis

Competitive Research

Copy a competitor's top-ranking page and analyze their keyword strategy — what terms are they targeting, at what density, and what related phrases do they use?

Copywriting Quality Check

Copywriting

Before delivering copy to a client, run a density check to ensure natural keyword distribution. Catch over-optimized passages before the client or their SEO team does.

Landing Page Analysis

Marketing

Analyze the keyword distribution of high-converting landing pages — your own or competitors'. Understand what phrases they emphasize and how naturally they're woven into the copy.

AI-Generated Content Review

AI Content

AI writing tools sometimes over-repeat specific phrases. Run AI-generated content through the density checker before publishing to identify and fix unnatural repetition.

Deep Dive

The Complete Guide to Keyword Density for SEO

What Is Keyword Density and Why Does It Matter?

Keyword density is the percentage of times a specific keyword appears in a piece of content relative to the total word count. It's one of the oldest on-page SEO metrics, dating back to when search engines primarily used keyword frequency to determine relevance. While modern SEO has evolved far beyond simple density analysis, keyword density remains a useful quality-control metric. Too low means you may not be clearly signaling your topic to search engines. Too high means you risk keyword stuffing penalties. The goal is natural, purposeful usage within the 1–2% sweet spot for primary keywords.

The History of Keyword Density in SEO

In the early days of search (pre-2010), keyword density was a primary ranking signal. Webmasters discovered that pages with very high keyword density (sometimes 10–15%) ranked better, leading to widespread keyword stuffing. Search engines responded with spam filters. Google's Panda update (2011) specifically targeted thin, low-quality content with unnatural keyword patterns. Hummingbird (2013) introduced semantic search, making content meaning more important than keyword frequency. Today, Google uses sophisticated NLP and machine learning — keyword density is just one tiny signal in hundreds. But stuffing still gets penalized, and natural usage still signals relevance.

N-gram Analysis: Why 2-Word and 3-Word Phrases Matter

Single-word keyword density is easy to check mentally — you notice when you've used the same word too often. But 2-word and 3-word phrase repetition is much harder to spot. An article about 'content marketing strategy' might use 'content marketing' as a phrase 12 times in 800 words (1.5% density) without the author noticing. This phrase-level over-optimization is exactly what our bigram and trigram analysis detects. Professional SEO tools like Yoast, Clearscope, and Surfer SEO all include n-gram analysis for this reason — it catches unnatural repetition that unigram analysis misses.

TF-IDF vs Keyword Density: A Modern SEO Perspective

While simple keyword density counts absolute frequency, TF-IDF (Term Frequency-Inverse Document Frequency) measures how important a word is relative to a corpus of documents. A word appearing frequently in your document AND rarely on other web pages scores very high TF-IDF — it's a unique relevance signal. Modern SEO tools like Surfer SEO and Clearscope use TF-IDF-based analysis. However, keyword density remains more actionable for most writers because it requires only your document — no corpus comparison needed. Think of density analysis as the accessible first step, and TF-IDF analysis as the more sophisticated refinement for competitive content.

Avoiding Keyword Stuffing in the Age of AI Content

AI writing tools have introduced a new keyword stuffing problem. AI models trained on web content sometimes over-represent target keywords because their training data contains SEO-optimized content that historically had higher density. When you prompt an AI to write about 'keyword density checker tools', it may produce content that mentions 'keyword density' in every other paragraph. Running AI-generated content through a density checker before publishing is becoming a standard quality control step — many content teams now include it in their editorial workflow alongside grammar checking and plagiarism detection.

Keyword Density in the Context of Semantic SEO

Modern SEO best practice is to optimize for topics, not keywords. This means covering a subject comprehensively using natural language — including the target keyword, its variations, related concepts, and commonly associated questions. Google's Knowledge Graph and BERT model understand semantic relationships between words. A page that covers 'keyword density', 'keyword frequency', 'keyword stuffing', 'n-gram analysis', and 'TF-IDF' will rank better for 'keyword density checker' than a page that just repeats 'keyword density checker' at 3% density. Use our tool to check density as a floor (is my keyword present enough?) not a ceiling (is my keyword present too much?)

Testimonials

What SEOs & Writers Say

Feedback from content professionals who use this in their SEO workflow.

“The bigram and trigram analysis is what makes this tool valuable. I never noticed how often I accidentally repeated the same two-word phrases until I saw them flagged in red. My content quality improved immediately.”

Sarah Okonkwo

Content Strategist

Digital Marketing Agency

“I use this for every client SEO audit. The traffic-light system means I can explain keyword stuffing issues to non-technical clients instantly — red means problem, no explanation needed.”

Raj Malhotra

SEO Consultant

Independent

“Running AI-generated drafts through this before publishing is now part of my workflow. AI tools love to repeat phrases. This catches it every time before the content goes live.”

Emma Larsen

Content Manager

SaaS Company

“The target keyword spotlight feature is excellent — I type in my focus keyword and see its density, count, and status without scrolling through 200 rows. Exactly what I need.”

Carlos Reyes

SEO Specialist

E-commerce Brand

FAQ

Frequently Asked Questions

Everything you need to know about keyword density and SEO

Keyword density is the percentage of times a keyword appears in a text relative to the total number of words. The formula is: (number of times keyword appears ÷ total word count) × 100. For example, if 'SEO' appears 15 times in a 1,000-word article, its density is 1.5%. Our tool calculates this for every word and phrase in your text — not just your target keyword.

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Keyword Density Checker

How to Check Keyword Density

Paste Your Content

Enter Your Target Keyword

Review the Analysis

Complete Keyword Analysis in One Tool

1-Word Keyword Analysis

2-Word Phrase Analysis

3-Word Phrase Analysis

Target Keyword Spotlight

SEO Traffic-Light Scoring

Keyword Stuffing Detection

Density Percentage

Copy & Export Report

Keyword Density Benchmarks

Optimal

Keyword Density SEO Recommendations

Primary Keyword: 1–2% Density

Who Uses the Keyword Density Checker

Blog Post Optimization

Client SEO Audits

Competitor Content Analysis

Copywriting Quality Check

Landing Page Analysis

AI-Generated Content Review

The Complete Guide to Keyword Density for SEO

What Is Keyword Density and Why Does It Matter?

The History of Keyword Density in SEO

N-gram Analysis: Why 2-Word and 3-Word Phrases Matter

TF-IDF vs Keyword Density: A Modern SEO Perspective

Avoiding Keyword Stuffing in the Age of AI Content

Keyword Density in the Context of Semantic SEO

What SEOs & Writers Say

Frequently Asked Questions

Related SEO & Writing Tools

Keyword Density Checker — All Topics

Need a Custom SEO or AI-Powered Content Tool?

Free Keyword Density Checker

Keyword Density Checker

How to Check Keyword Density

Paste Your Content

Enter Your Target Keyword

Review the Analysis

Complete Keyword Analysis in One Tool

1-Word Keyword Analysis

2-Word Phrase Analysis

3-Word Phrase Analysis

Target Keyword Spotlight

SEO Traffic-Light Scoring

Keyword Stuffing Detection

Density Percentage

Copy & Export Report

Keyword Density Benchmarks

Optimal

Keyword Density SEO Recommendations

Primary Keyword: 1–2% Density

Who Uses the Keyword Density Checker

Blog Post Optimization

Client SEO Audits

Competitor Content Analysis

Copywriting Quality Check

Landing Page Analysis

AI-Generated Content Review

The Complete Guide to Keyword Density for SEO

What Is Keyword Density and Why Does It Matter?

The History of Keyword Density in SEO

N-gram Analysis: Why 2-Word and 3-Word Phrases Matter

TF-IDF vs Keyword Density: A Modern SEO Perspective

Avoiding Keyword Stuffing in the Age of AI Content

Keyword Density in the Context of Semantic SEO

What SEOs & Writers Say

Frequently Asked Questions

Related SEO & Writing Tools

Keyword Density Checker — All Topics

Need a Custom SEO or AI-Powered Content Tool?