Keyword Extractor JS

A precise keyword extraction tool that analyzes input text or web content to return relevant keywords and topic terms for SEO and content optimization.

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About This Tool

The tool identifies relevant keywords from a source text or fetched web content to support SEO planning and content development.
It tokenizes, normalizes, and removes stopwords to surface candidate terms and phrases with contextual relevance.
Scores combine term frequency with a weighting factor similar to TF-IDF, highlighting terms that uniquely characterize the source content while de-emphasizing generic words. The output is structured, suitable for integration into metadata templates, content briefs, or topic maps.
Use cases include optimizing a new article idea, auditing existing pages, or generating seed keywords for a content calendar. Multilingual support and optional stopword customization help tailor results to regional audiences. The tool favors terms that capture the topic's core semantics and relationships, enabling efficient keyword planning and consistent vocabulary across projects.

Save your calculation history with a free account

How to Use

Provide inputs: paste text or specify a URL to analyze.
Configure language and max_keywords; optionally supply a stopword list or enable stemming.
Run extraction to generate keyword candidates and optional scores.
Review results in the output panel and export as JSON or CSV if needed.
Integrate keywords into content briefs, metadata, or topic maps.

Frequently Asked Questions

Find Quick Answers

What sources can I analyze?

The tool accepts plain text or a URL pointing to web content. It fetches accessible page content when possible and applies the same extraction process. For restricted pages or login-protected content, only provided text is analyzed.

How are scores computed?

Scores combine token frequency with contextual weighting: TF (term frequency) and IDF (inverse document frequency) approximations are used to emphasize distinctive terms. Stopword filtering and optional stemming refine candidates, producing a ranked list of terms by relevance.

Can I export results?

Yes. The tool returns a structured list of keywords with scores and can export to JSON or CSV for import into content briefs, dashboards, or CMS metadata templates.

Which languages are supported?

The tool supports multiple languages; you specify the language parameter. If not specified, English is assumed. Stopword lists and basic stemming adapt to the selected language to improve term quality.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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