SEO Tool

Keyword Density & N-gram Analyzer

Paste any text — get keyword density, top bigrams and trigrams, Flesch Reading Ease readability score, reading time, and over-optimization warnings. Pure client-side.

✅ Free access 🔒 No Signup ⚡ Browser processing 🌐 Browser Based

Quick Answer

The Keyword Density Analyzer counts unigrams (single words), bigrams (2-word phrases) and trigrams (3-word phrases) in your text, computes density percentages, scores readability with Flesch Reading Ease, estimates reading time, and warns you if any keyword exceeds the 4% editorial repetition indicator.

Characters

435

Words

Sentences

Reading time

1 min

Flesch Reading Ease

Difficult — College

⚠️ Repetition review warning: "search" (4.5%), "seo" (4.5%) appear above 4% density. Review repetition in context; this is not a Google penalty threshold.

Top words

search	3	4.5%
seo	3	4.5%
content	2	3.0%
engines	2	3.0%
engine	1	1.5%
optimization	1	1.5%
practice	1	1.5%
improving	1	1.5%
visibility	1	1.5%
website	1	1.5%
organic	1	1.5%
results	1	1.5%
modern	1	1.5%
no	1	1.5%
longer	1	1.5%

Top bigrams

seo is

3.0%

Top trigrams

—

Quick Facts

Tool Name: Keyword Density & N-gram Analyzer
Category: SEO Tool
Price: Free browser utility; device and input limits apply.
Platform: Browser Based
Login Required: ✓ No
Processing & privacy: The core calculation runs in your browser. This tool does not need a paid AI API for its core output.
Scope: Results describe the submitted input and supported checks. They do not guarantee accuracy, search rankings, indexing or AI citations. Read our testing and scoring methodology.

How to Use Keyword Density & N-gram Analyzer

Enter Your Input
Paste your text or fill in the required fields in the tool above.
Run the Tool
Use the controls above; some browser tools update as you type.
Review the Results
Review the output and any warnings. Hosted checks need an internet connection.
Copy or Export
Use the available copy or download controls, and review suggestions before publishing.

Frequently Asked Questions

Everything you need to know about Keyword Density & N-gram Analyzer

What's the ideal keyword density for SEO?

There is no universal target or Google penalty threshold. Use repetition counts to review natural wording and relevance. The 4% highlight is only an editorial prompt, not a search-engine rule.

What are bigrams and trigrams, and why do they matter?

Bigrams are 2-word phrases, trigrams are 3-word phrases. Search engines (and AI engines) increasingly rank pages by phrase-level topical fit, not just single keywords. If your bigrams and trigrams don't naturally cluster around your target topic, your page reads as off-topic even with the right unigrams.

What's the Flesch Reading Ease score?

Flesch Reading Ease estimates English readability using sentence length and estimated syllables. Higher values generally mean easier reading. It is not a grade level or ranking factor; names and technical words can skew estimates.

Are stop words counted?

Stop words ('the', 'and', 'of', 'to', etc.) are filtered out of the unigram count but kept in bigrams and trigrams — because phrases like 'how to' or 'best of' are meaningful even though each word in isolation is a stop word.

Is my content uploaded?

No. All tokenization, n-gram counting and readability scoring run entirely in your browser. Safe for unpublished drafts, internal docs and confidential content.

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