日本語

Check keyword density

Not because density is a ranking factor — it has not been for years — but because seeing the top twenty words of a page tells you in five seconds whether it is about what you thought.

Loading the tool…

How it works

  1. Paste the text, or the whole HTML (tags are stripped).
  2. Set the minimum word length and whether to ignore common words.
  3. Read the table.

Why nothing is uploaded

Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.

Verify it yourself

  1. Open your browser’s developer tools (F12) and select the Network tab.
  2. Load your file and run the tool.
  3. The only requests you will see are the tool’s own code and, once cached, none at all.

Proof it stays local →

Frequently asked questions

What density should I aim for?

None. Writing towards a percentage makes text worse and has not helped rankings since the early 2010s. Use the table diagnostically: if a page about warehouse logistics has “contact” as its top word, the problem is not the density, it is the page.

Does anything leave my browser?

No. There is no server behind this page doing the work and no API being called — the whole tool is JavaScript running in the tab. Load it once and it keeps working with the connection off.