What is keyword density and why does it matter for SEO?

Keyword density is the percentage of times a keyword appears relative to the total word count. While Google no longer uses a strict density formula, analyzing density helps you spot over-optimized (keyword-stuffed) content and ensure your primary topic is reflected naturally throughout the text.

What is the ideal keyword density?

There is no fixed ideal, but a natural-sounding article typically keeps any single keyword below 2–3% density. If a term appears at 5%+ it may feel repetitive to readers and could be flagged as over-optimization by search engines.

What are bigrams and trigrams?

A bigram is a two-word phrase (e.g. 'keyword density'), and a trigram is a three-word phrase (e.g. 'keyword density checker'). Analyzing these reveals which multi-word topics dominate your content — important for long-tail SEO.

Stop words are common English words like 'the', 'is', 'and', 'of' that carry little semantic meaning. Filtering them out reveals the substantive keywords in your text. Toggle the stop word filter off if you want to see them included.

Is my content sent to a server?

No. All keyword analysis runs in your browser. Your text never leaves your device.

Keyword Density Checker – Unigrams, Bigrams & Trigrams

Paste any text and instantly analyze keyword frequency and density percentages — for single keywords, two-word bigrams, or three-word trigrams. Toggle a built-in stop word filter to focus on meaningful content keywords. All processing is 100% client-side.

Keyword Density Analyzer

Paste your content and analyze keyword frequency & density.

Words

Unique

Characters

Sentences

N-gram

Include stop words

Keywords will appear here

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Density Analysis

See keyword frequency and percentage density at a glance.

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N-gram Support

Analyze single words, 2-word, or 3-word phrases.

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Private

All analysis runs in your browser. Nothing is sent anywhere.

What This Keyword Checker Analyzes

Keyword Frequency Analyzer

See every keyword ranked by count and density % with a relative bar chart for instant visual comparison.

N-gram Mode Selector

Switch between single keywords (unigrams), 2-word phrases (bigrams), and 3-word phrases (trigrams) with one click.

Stop Word Filter

Toggle a built-in 100+ English stop word list to hide filler words and focus on meaningful content keywords.

Text Statistics

Instant totals for word count, unique word count, character count, and sentence count alongside the keyword table.

How to Check Keyword Density

Paste your content

Drop your article, blog post, or any text into the input area. Word, character, and sentence counts update immediately.

Choose N-gram mode

Select 1 for single keywords, 2 for two-word phrases, or 3 for three-word phrases depending on what you want to analyze.

Filter stop words

Toggle 'Include stop words' off to remove common filler words and focus on your content's meaningful keywords.

Review density results

Read the ranked keyword table showing count and density %. Aim for a natural spread — over-stuffing a term above 3–4% can flag thin content.

Keyword Stuffing vs. Natural Usage: What Google Actually Penalizes

Google's documentation explicitly warns against "stuffing a page with keywords" as a form of spam. But the threshold for what counts as stuffing is intentionally not defined by a fixed percentage — it is evaluated in context. A 3% density for a primary keyword in a 500-word article about that exact topic may be completely natural. The same 3% in an article ostensibly about something else is obviously forced. The practical signal Google evaluates is whether keyword repetition adds value or degrades the reading experience. Run this checker after writing, not before — write for the reader first and then check the density to catch any accidental over-repetition. If you find a keyword appearing 5–6 times in a short article, replace some instances with synonyms, use pronouns, or restructure the sentence. Natural variation in language is itself a positive quality signal.

How Bigram and Trigram Analysis Helps Long-Tail SEO

Single-keyword analysis shows word frequency, but most search queries are multi-word phrases. Analyzing bigrams (two-word pairs) and trigrams (three-word groups) reveals the actual topics your content covers — which maps directly to the long-tail queries it can rank for. For example, an article about home loans might rank for individual words like "loan" or "interest" at low density, but if the bigrams "home loan", "EMI calculation", and "interest rate" each appear 3–4 times naturally, the content is well-positioned for those specific search phrases. Switch the checker to bigram mode after finishing a draft to see whether your most important two-word target phrases appear with enough frequency. If a key phrase appears only once in a 1,000-word article, work it in naturally two or three more times in different sections. Trigram analysis is most useful for checking whether highly specific long-tail phrases ("home loan interest rate 2025") are present in your content — these phrases often have very low competition and can be the primary ranking driver for a new site.

Frequently Asked Questions

What is keyword density and why does it matter for SEO?: Keyword density is the percentage of times a keyword appears relative to the total word count. While Google no longer uses a strict density formula, analyzing density helps you spot over-optimized (keyword-stuffed) content and ensure your primary topic is reflected naturally throughout the text.
What is the ideal keyword density?: There is no fixed ideal, but a natural-sounding article typically keeps any single keyword below 2–3% density. If a term appears at 5%+ it may feel repetitive to readers and could be flagged as over-optimization by search engines.
What are bigrams and trigrams?: A bigram is a two-word phrase (e.g. 'keyword density'), and a trigram is a three-word phrase (e.g. 'keyword density checker'). Analyzing these reveals which multi-word topics dominate your content — important for long-tail SEO.
What are stop words?: Stop words are common English words like 'the', 'is', 'and', 'of' that carry little semantic meaning. Filtering them out reveals the substantive keywords in your text. Toggle the stop word filter off if you want to see them included.
Is my content sent to a server?: No. All keyword analysis runs in your browser. Your text never leaves your device.

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