Your HTML:
Title
Word DF BM25 ATF YTF
Click on the word on the left

Comma separated list of stop words that will be exluded from text and used as dividers for phrases

Replace words/phrases with their canonical form. Each line holds a comma separated list of words/phrases to be replaced, followed by their canonical form.

TF-IDF + BM25 free online calculator SEO tool for content relevance

This advanced SEO tool helps you understand how your content compares to competing pages by using TF-IDF and BM25 — two well-known algorithms for measuring term relevance.

The tool calculates which terms appear frequently and prominently in their content but are missing or underused in yours. It highlights topics and terms you may want to explore so you can strengthen relevance, improve coverage, and better align your page with what’s performing in your niche.

To start, paste your page in "Your HTML", add at least two competing pages using "Add document", and click "Calculate terms".

All calculations are done in your browser. Your data is never sent to our server.

There are more free SEO tools on this website, see the full list.