Free SEO Tool

Keyword Density
Analyzer

Paste your page content and instantly see keyword frequency, density percentages, bigrams, and trigrams. Spot over-optimisation and missed keyword opportunities before you publish.

Live Analysis Keywords Bigrams Trigrams Stop Word Filter Target KW Tracking
Content Input
0 words 0 characters 0 sentences
Analysis Settings
Analysis Results
◉Paste content above and click
Analyze Content to see results.
Content Metrics
Word Count
—
Enter content above
Unique Words
—
—
Target KW Density
—
Enter a target keyword
Density Breakdown
Top KW
—
Target KW
—
Avg. Density
—
Readability
—
Density Guide
1–3% — Optimal range
<0.5% — Under-optimised
>5% — May flag stuffing
0.5–1% — Borderline low
Quick Tips
KEYWORDS → Aim for 1–3% primary KW
→ Use synonyms & variants
→ Front-load in first 100 words

PHRASES → Bigrams reveal LSI topics
→ Trigrams = long-tail targets
→ Match user search intent

AVOID → Repeating exact phrase 5×
→ Ignoring H1/H2 keyword use
→ Stuffing in image alt text

Step-by-Step Guide

How to Use the
Keyword Density Analyzer

01
Paste Your Content

Copy all on-page text — headings, body paragraphs, and captions — and paste it into the Content Input field. Exclude navigation, footers, and boilerplate.

02
Set a Target Keyword

Enter your primary keyword in the Target Keyword field. The tool highlights every occurrence and gives you a dedicated density readout in the sidebar.

03
Configure Settings

Toggle stop word filtering (recommended), set your minimum word length, and choose how many results to display. These settings refine signal-to-noise in your results.

04
Review Keywords Tab

The Keywords tab lists every significant word by frequency and density. Green bars indicate healthy density; red indicates over-use that may trigger keyword stuffing penalties.

05
Check Bigrams & Trigrams

Switch to the Bigrams and Trigrams tabs to find recurring multi-word phrases. These reveal LSI keyword opportunities and natural long-tail targets you may be missing.

06
Export & Optimise

Download results as CSV to share with your team or track changes across drafts. Use the sidebar density guide and tips to make targeted improvements.

Common Questions

Frequently Asked
Questions

What is keyword density and how is it calculated? +
Keyword density is the percentage of times a keyword appears in a piece of text relative to the total word count. The formula is: (keyword occurrences ÷ total words) × 100. For example, if "SEO" appears 5 times in a 500-word article, its density is 1%.
What is the ideal keyword density for SEO? +
There is no single magic number, but 1–3% is widely considered optimal for a primary keyword. Below 0.5% may mean the topic is underrepresented; above 4–5% risks being seen as keyword stuffing. Focus on natural writing and use synonyms and variants to provide topical depth.
What are stop words and should I filter them? +
Stop words are common function words — the, and, is, in, of — that carry no keyword value on their own. Filtering them out lets you focus on meaningful content words. Enable filtering for standard SEO analysis; disable it if you need a complete word frequency distribution for academic or copy-editing purposes.
How do bigrams and trigrams help SEO? +
Bigrams (two-word phrases) and trigrams (three-word phrases) reveal naturally occurring topic clusters in your content. Recurring phrases often map to long-tail search queries. If "keyword density tool" appears frequently, that phrase may be a rankable long-tail term. Use these insights to build internal links, heading variants, and related content.
Does keyword density directly affect my rankings? +
Keyword density is not a direct ranking factor in the modern Google algorithm. However, it serves as a useful proxy for topical relevance. Very low density may indicate thin content on a topic; very high density triggers keyword stuffing filters. Use this tool to ensure your content reads naturally while covering the topic with appropriate depth.
Can I analyze competitor content with this tool? +
Yes. Simply copy the visible text from any competitor page (Ctrl+A → Ctrl+C on the page, or use a tool like Reader Mode to extract clean copy), paste it into the Content Input field, and run the analysis. This helps you identify the keyword patterns your top-ranking competitors use.

About This Tool

What is a
Keyword Density Analyzer?

The Tool

The SEO HQ Keyword Density Analyzer processes any body of text and returns a ranked frequency table for individual keywords, bigrams, and trigrams — complete with density percentages and visual bar indicators. Enter a target keyword to track it separately and see its density at a glance.

Why It Matters

Over-optimised pages get penalised; under-optimised pages don't rank. Getting keyword density right is one part of on-page SEO that is entirely within your control before you hit publish. This tool gives you the data to make that call with confidence, for every piece of content you produce.

Key Features

  • Real-time word count, character count & sentences
  • Ranked keyword frequency with density bars
  • Bigram and trigram phrase analysis
  • Target keyword density tracker with colour-coded feedback
  • Stop word filtering and configurable word length
  • One-click CSV export for team reporting

Best Practices

  • Analyze full page copy, not just body text
  • Check bigrams for unintentional phrase repetition
  • Compare against top-ranking competitor content
  • Use synonyms to diversify without stuffing
  • Revisit density after every major content revision
  • Combine with a readability check for best results