What does the Keyword Density Checker do?

The Keyword Density Checker from PowerSEOTools.online analyzes your content to calculate how often specific keywords appear, their density percentage, and the most frequent words and phrases. It helps you optimize on-page SEO without overusing keywords.

How is keyword density calculated?

Keyword density is calculated as the number of times a keyword appears, multiplied by the number of words in that keyword phrase, divided by the total word count of the content, then multiplied by 100 to get a percentage.

What is a good keyword density for SEO?

There is no exact perfect number, but many SEO professionals aim for a keyword density in the range of 0.5% to 3% for main keywords. Content should read naturally for humans first, and keyword density is just one signal among many.

Does this tool store my content or keywords?

No. All calculations run directly in your browser using JavaScript. Your text and keywords are not uploaded, stored or logged on our servers, making the tool safe for confidential drafts and client content.

Can I analyze multi-word keyword phrases?

Yes. You can enter single keywords or multi-word phrases separated by commas or new lines. The tool counts how many times each phrase appears and calculates phrase-based keyword density.

📊 On-Page SEO Analyzer

Keyword Density Checker

Paste your content, add target keywords, and instantly calculate keyword density, frequency, and top words & phrases for SEO-friendly content optimization.

Content to analyze

Tip: Analyze at least one full section (100+ words) for more reliable keyword density insights.

Primary keywords or phrases

You can enter single words or multi-word phrases (one per line or comma-separated).

Ignore case (SEO = seo = Seo)

Ignore common stopwords in top lists

Include 2-word phrases

Include 3-word phrases

💡 Ideal main keyword density is often around 0.5%–3%. Focus on natural language first.

Total Words

Includes all words in the content

Unique Words

After basic normalization

Primary Keywords Found

0 of 0 keywords appear

Estimated Reading Time

0 min

At ~200 words per minute

Primary Keyword Density

Based on your target keywords

Keyword / Phrase	Occurrences	Density	Indicator
Enter keywords above and click Analyze Keyword Density to see results here.

Density is calculated as (occurrences × words in phrase) ÷ total words × 100. Values above ~3–4% for a single keyword may indicate over-optimization for typical articles.

Top Words & Phrases

Great for discovering natural keyword usage

Top Single Words

Word	Count	Density
Results appear here after analysis.

Top 2–3 Word Phrases

Phrase	Count	Density
Enable phrase options above and analyze to see common phrases.

Use these top words and phrases to refine your headings, subheadings, and meta tags. Make sure the terms that matter most for your topic appear naturally throughout your content.

Free Online Keyword Density Checker

The Keyword Density Checker from PowerSEOTools.online helps you understand how search engines might interpret your content. By analyzing the frequency and density of keywords, you can avoid both under-optimization and keyword stuffing while keeping your writing natural.

Why Keyword Density Still Matters

Modern search engines are far more advanced than simple keyword counters, but they still use keyword signals to understand what a page is about. Checking keyword density helps you:

Ensure your main topic is clearly represented in the content.
Spot overused keywords that may look spammy to users and algorithms.
Discover naturally occurring related terms and synonyms.
Align headings, meta tags and body copy around the same core topic.

Best Practices for Keyword Density

Aim for a main keyword density around 0.5%–3% as a general guideline.
Use variations, synonyms and long-tail phrases to keep language natural.
Write for humans first – readability and clarity are more important than exact percentages.
Review both top words and top phrases to understand your content’s true focus.

Privacy-Friendly, Browser-Based Analysis

All calculations happen directly in your browser using JavaScript. Your content and target keywords are never uploaded or stored on our servers, making this tool safe for confidential drafts, client work and internal documents.

Combine with Other PowerSEOTools.online Utilities

After optimizing keyword density, refine your on-page SEO further with tools like the Meta Tag Generator, SEO Title Length Checker, Meta Description Checker and Backlink Checker on PowerSEOTools.online.