Keyword Extractor | Free Keyword Density Tool - SEOKit
Free keyword extractor tool. Extract the most frequent keywords and phrases from any text. Analyze keyword density and discover content themes for SEO.
What is Keyword Extractor?
How to Use Keyword Extractor
Paste your text into the input area. The tool automatically extracts single keywords (unigrams), two-word phrases (bigrams), and three-word phrases (trigrams). Results are sorted by frequency and show occurrence count and density percentage. Use the filter to focus on specific n-gram types. Common stop words (the, is, and, etc.) are excluded automatically.
How Keyword Extractor Works
Common Use Cases
- Analyze content keyword focus before publishing
- Check keyword density to avoid over-optimization
- Discover content themes and topics in competitor articles
- Find frequently used phrases for SEO keyword research
- Audit existing content for keyword relevance
Frequently Asked Questions
What is keyword density?▼
Keyword density is the percentage of times a keyword or phrase appears in your text relative to the total word count. For example, if a keyword appears 5 times in a 500-word article, the density is 1%. Generally, 1-2% density is considered natural for primary keywords.
What are n-grams?▼
N-grams are contiguous sequences of words. Unigrams are single words, bigrams are two-word phrases, and trigrams are three-word phrases. Analyzing n-grams helps you understand not just individual word frequency but also which multi-word phrases are prominent in your content.
What are stop words?▼
Stop words are common words like "the", "is", "and", "in", "to" that carry little meaning on their own. Keyword extractors exclude stop words to focus on content-bearing words that indicate the actual topics and themes of the text.
What is the ideal keyword density for SEO?▼
There is no magic number, but 1-2% is generally considered natural for primary keywords. More important than density is using keywords naturally, including variations and synonyms, and covering the topic comprehensively. Over-optimization (3%+ density) can trigger spam filters.
Related Tools
Keyword Density Checker
Free keyword density checker. Analyze your content's keyword distribution. Find ...
Word Counter
Free online word counter. Count words, characters, sentences, and paragraphs ins...
Readability Checker
Free readability checker. Calculate Flesch-Kincaid readability score, grade leve...
Explore More Free Tools
Discover more tools from our network — all free, browser-based, and privacy-first.