Free Word Frequency Analyzer & Keyword Density Counter
Analyze word frequency, keyword density, and phrase patterns in any text. Supports unigrams, bigrams, and trigrams with stop-word filtering and CSV export — all in your browser, instantly.
Word frequency, keyword density, n-gram analysis & CSV export — free & instant.
Paste your text, choose your n-gram size, toggle stop words, and click Analyze. Perfect for SEO marketers, content researchers, writers, and developers.
Last updated: May 18 2026
Reviewed by the QuickTooly Team
Word Frequency Guide
Why Use This Free Word Frequency Analyzer?
- N-gram analysis: Count single words, 2-word phrases, or 3-word phrases to uncover hidden keyword patterns.
- Stop-word filter: Remove common filler words (the, is, and…) to surface meaningful keywords instantly.
- Keyword density: See the exact percentage each word or phrase contributes to your total word count.
- Visual chart: Interactive bar chart shows the top 15 terms at a glance for fast pattern recognition.
- CSV export: Download your results in CSV format to open in Excel, Google Sheets, or any data tool.
- 100% private: All analysis runs locally in your browser — your text is never sent to any server.
- Completely free: No account, no limits, no tracking.
Who Uses a Word Frequency Counter?
Word frequency analysis is a foundational technique used across many fields. SEO specialists use keyword density data to ensure content is optimized without over-stuffing. Content researchers and journalists analyze texts to identify recurring themes and focal points. Teachers and professors use word frequency to study literature, analyze student essays, or demonstrate linguistic concepts. Developers use it for NLP preprocessing, sentiment analysis, and text mining pipelines.
What Are N-grams?
An n-gram is a contiguous sequence of n words from a piece of text. A unigram (n=1) is a single word. A bigram (n=2) is a pair of consecutive words, like "machine learning" or "keyword density". A trigram (n=3) is three consecutive words, like "search engine optimization". Analyzing bigrams and trigrams reveals multi-word keywords and phrases that single-word analysis would miss — critical for modern SEO research.
What Are Stop Words?
Stop words are extremely common words that carry little semantic meaning on their own — words like "the", "a", "is", "and", "of". When counting word frequency for SEO or research purposes, stop words usually appear at the very top of the list and obscure the meaningful keywords underneath. Enabling the stop-word filter removes these words before counting, making the results immediately more useful for content analysis.
How to Use the Results for SEO
Compare the keyword density of your content against your target keyword. SEO best practice generally targets a keyword density of 1–3% for your primary term. Use the bigram and trigram analysis to identify long-tail keyword opportunities naturally embedded in your text. Export to CSV and import into your SEO spreadsheet for competitive analysis alongside search volume and KD data.
Frequently Asked Questions
What is keyword density and why does it matter?
Keyword density is the percentage of times a keyword appears in a text relative to the total word count. It matters for SEO because search engines use word frequency as one signal to understand the topic of a page. Too low and the page may not rank; too high and it may be flagged for keyword stuffing.
Is this word frequency tool completely free?
Yes — 100% free with no account, no subscription, and no usage limits. There is no cap on text length or number of analyses.
What languages does the stop-word filter support?
The built-in stop-word list covers English. For other languages, you can disable the stop-word filter and interpret the raw frequency counts directly — the most frequent meaningful words will still float to the top.
Can I analyze very long texts?
Yes. The analysis runs entirely in your browser with no server upload, so it works on large texts limited only by your device's memory. Most modern browsers handle hundreds of thousands of words without any issue.
What format is the CSV export?
The downloaded file is a standard comma-separated values (CSV) file with four columns: Rank, Word/Phrase, Count, and Frequency%. It opens directly in Microsoft Excel, Google Sheets, LibreOffice Calc, and any other spreadsheet application.
Is my text sent to any server?
No. All processing happens locally in your browser using JavaScript. Your text never leaves your device. This makes the tool safe to use with confidential drafts, client content, or proprietary documents.