TF-IDF Keyword Extraction Tool
Extract key terms and phrases with our free TF-IDF keyword extraction tool. Analyze text importance right in your browser without signup. Try it now.
About Keyword Extraction (TF-IDF)
The TF-IDF keyword extraction tool identifies the most relevant terms and phrases within a text using Term Frequency-Inverse Document Frequency weighting. It calculates word frequency against background term distribution to surface high-value topics, subject matter keywords, and recurring concepts without manual tag selection.
Ideal for SEO specialists, researchers, content marketers, and text analysts, this tool operates entirely within your browser. Your text stays on your device for complete privacy, requires no software setup, and provides instant numerical scores for free without registration.
Key features
- Calculates term frequency and inverse document frequency scores
- Filters common stop words automatically for cleaner results
- Supports single words and multi-word phrase extraction
- Runs entirely in the browser to maintain data privacy
- Allows custom minimum word length and occurrence thresholds
- Exports extracted keywords and numerical weights to CSV
How to use Keyword Extraction (TF-IDF)
- Paste your text directly into the input field.
- Configure stop word filtering and phrase length options.
- Click the extract button to calculate keyword relevance weights.
- Review the ranked list of extracted terms and scores.
- Copy the results to your clipboard or download as CSV.
Who is it for?
- SEO professionals optimizing landing pages by identifying core thematic keywords
- Researchers parsing academic papers and abstracts for recurring technical concepts
- Content strategists analyzing competitor articles to discover topical content gaps
- Data scientists quickly prototyping natural language processing text pipelines
Frequently asked questions
What is TF-IDF in keyword extraction?
TF-IDF stands for Term Frequency-Inverse Document Frequency. It is a statistical measure that evaluates how important a word is to a document relative to a broader collection of text, discounting common words while highlighting unique, relevant terms.
Is my text data stored or sent to a server?
No. The extraction algorithm runs locally in your web browser. Your text is processed on your device and is never uploaded, stored, or viewed by external servers.
Can the tool extract multi-word phrases?
Yes. You can configure the tool to extract n-grams, enabling you to identify two-word and three-word key phrases alongside individual terms.
How does TF-IDF differ from basic word count?
Simple word frequency counts raw occurrences, which often favors generic words like prepositions and conjunctions. TF-IDF balances frequency with rarity, prioritizing terms that define the specific subject matter of the text.
Is this TF-IDF keyword extraction tool free?
Yes. The tool is free to use with no account creation, subscriptions, or usage limits required.