SEO Tool

Keyword Density & N-gram Analyzer

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

✅ Free Forever 🔒 No Signup ⚡ Instant Results 🌐 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-Kincaid, estimates reading time, and warns you if any keyword exceeds the 4% over-optimization threshold.

Characters

435

Words

Sentences

Reading time

1 min

Flesch-Kincaid

Difficult — College

⚠️ Over-optimization warning: "search" (4.5%), "seo" (4.5%) appear above 4% density. Google may flag this as keyword stuffing.

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
Platform: Browser Based
Login Required: ✓ No
Last updated: 2026-05-20

How to Use Keyword Density & N-gram Analyzer

Enter Your Input
Paste your text or fill in the required fields in the tool above.
Click Generate
Hit the generate or analyze button to start processing.
Get Instant Results
The tool processes your input instantly in your browser.
Copy or Export
Copy your results to clipboard or download the output.

Frequently Asked Questions

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

What's the ideal keyword density for SEO?

Modern SEO doesn't have a fixed target. Google's algorithm cares about topical relevance, not exact-match repetition. A natural range is 0.5%–2% for your primary keyword. Above 4% the tool warns you because that's where Google's algorithms start flagging over-optimization (keyword stuffing penalty).

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-Kincaid score?

A readability score from 0 (very difficult, college-graduate level) to 100+ (very easy, 5th-grade level). For web content, aim for 60–80 (8th-grade reading level — Hemingway's rule). Below 50 your text is dense; above 90 it may read as childish. The tool computes the score live as you edit.

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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