Advanced Semantic Clustering (Jaccard)

Free Keyword Clustering Tool for SEO

Paste up to 1,000 raw keywords from Ahrefs or GSC. Our algorithm groups them into semantic topic clusters and generates ready-to-write article outlines instantly. 100% Free.

1. Paste Raw Keywords

One keyword per line
0 Keywords

Grouping Strictness (Similarity Threshold)

Medium (0.3)

Higher = More specific (smaller groups). Lower = Broader topics (larger groups).

2. Topic Clusters

Paste your keywords and click generate to see semantic topic clusters.

The Anatomy of a Topic Cluster

In 2026, Google ranks websites based on Topical Authority, not just single-keyword optimization. To rank for competitive terms, you need a structured network of content.

Pillar Page
(High Volume, Broad Topic)
e.g., "Ultimate Guide to Running Shoes"
Cluster Article 1
(Long-tail)
"Best Shoes for Flat Feet"
Cluster Article 2
(Long-tail)
"How to Clean Running Shoes"
Cluster Article 3
(Long-tail)
"When to Replace Your Shoes"

Jaccard Similarity Algorithm

Unlike basic tools that just look for an exact matching word, our tool uses Jaccard Similarity. It tokenizes phrases, removes stop words (like "how", "to", "the"), and calculates the mathematical overlap between search intents. This groups "baking a cake" and "how to bake cakes" together perfectly.

100% Free & Private

Enterprise SEO tools charge $100+/month for keyword clustering. We run the intensive string-matching algorithms directly in your browser's RAM via Web Workers. No data is sent to a server, and there are no export limits.

Ready-to-Write Outlines

Exporting to CSV is great for spreadsheets, but our "Copy Markdown" feature turns your clustered groups into formatted `H1`, `H2`, and `H3` outlines that you can paste directly into WordPress, Ghost, or Notion.

How to Use This Tool

Automate keyword grouping with our free tool, streamlining SEO content strategies.

  1. Enter your keyword list into the tool.
  2. Select the clustering algorithm and parameters.
  3. Run the tool to generate topical clusters.
  4. Refine clusters based on relevance and intent.
  5. Download and integrate clusters into your SEO strategy.

What Is Free Keyword Clustering Tool for SEO?

Our keyword clustering tool groups keywords into topical clusters automatically, enabling efficient silo content strategies and organized keyword lists by intent.

Key features include automated keyword mapping, topical authority building, and customizable clustering parameters for precise control.

This tool benefits SEO strategists and content managers by saving time and improving content relevance.

Why You Need This

Enhance your SEO strategy with keyword clustering.

Pro Tips for Best Results

Frequently Asked Questions

What is keyword clustering?

Keyword clustering is the process of grouping related keywords into topical clusters to improve content organization and relevance.

How does the tool work?

The tool uses algorithms to analyze keyword relationships and group them into clusters based on relevance and intent.

Is the tool free?

Yes, our keyword clustering tool is free to use, with no limits on the number of keywords or clusters.

Can I customize the clustering parameters?

Yes, you can adjust parameters such as cluster size and relevance threshold to refine your clusters.

How do I integrate clusters into my SEO strategy?

You can use the clusters to inform content creation, silo strategies, and keyword research, and monitor their performance to adjust your strategy accordingly.