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Keyword Density Checker

Analyses keyword density for single words and two- and three-word phrases, with stop words removed and counts per thousand words.

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Type or paste text above — the numbers update live.
In short Keyword Density Checker is a free online tool on inputtesthub.com that analyses keyword density for single words and two- and three-word phrases, with stop words removed and counts per thousand words. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Keyword Density Checker

  1. Paste or type your text into the input box, or drop in a .txt file.
  2. The counts update live as you type — there is no button to press.
  3. Use the copy or download button to keep the results.

About the Keyword Density Checker

The Keyword Density Checker analyses keyword density for single words and two- and three-word phrases, with stop words removed and counts per thousand words. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Checking a draft has not over-used a keyword.
  • Finding which phrases a competitor page repeats.
  • Spotting a missing focus keyword in a long article.

The maths behind it

This tool uses density = occurrences ÷ total words × 100, calculated separately for one-, two- and three-word phrases. Every intermediate value is shown on screen, so the result can be checked by hand.

There is no target density that improves rankings. Google has used semantic matching for over a decade, and repeating a phrase to hit a percentage reads badly and can look manipulative. Use this to catch accidental over-use, not to reach a number.

Frequently asked questions

Are there any usage caps on the Keyword Density Checker?
There is no cost and no cap. The Keyword Density Checker is not a demo of a paid product, so nothing is held back or watermarked.
Is the Keyword Density Checker safe to use with private information?
No. The Keyword Density Checker runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
What formula does the Keyword Density Checker use?
It uses density = occurrences ÷ total words × 100, calculated separately for one-, two- and three-word phrases. The full working is printed under the result, so you can follow every step rather than trusting a black box.
Who is the Keyword Density Checker for?
Typical uses: checking a draft has not over-used a keyword. Finding which phrases a competitor page repeats. Spotting a missing focus keyword in a long article. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything to watch out for?
There is no target density that improves rankings. Google has used semantic matching for over a decade, and repeating a phrase to hit a percentage reads badly and can look manipulative. Use this to catch accidental over-use, not to reach a number.
Does the Keyword Density Checker work on a phone?
Yes. The page is responsive and the tool works in Chrome, Safari, Firefox, Edge and Samsung Internet on both Android and iOS. There is no app to install and nothing to sign into.

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