Keyword Density Checker — Browser Text Analysis

Text

Keyword Density Checker is a browser text tool that counts word frequency and keyword density percentages.

Keyword Density Checker

Runs in this browserInput and recent results are processed only in this browser tab. They are not sent to or stored on a server.

Density = keyword count / counted words x 100. No-stopwords mode removes common function words from the count.

Text to analyze

ResultRule shown

—

What is it

Keyword Density Checker helps with search content checks, editorial review, and accessibility-adjacent text preparation. Input is capped at 20,000 characters to keep the browser responsive.

density = keyword count / counted words * 100

How to use

1Paste or type text.
2Choose an option when available.
3Review the analysis or transformed output.

Reference

Keyword Density Checker — Browser Text Analysis Reference
Input	Result
hello hello world	hello: 2 (66.67%)

Sources & standards

MDN Web Docs: Client-side web APIs - MDN Web Docs

FAQ

Is Keyword Density Checker input sent to a server?

No. The input is processed locally in your browser and is not sent to a server.

Do Korean and English texts use identical rules?

No. Word and sentence counts are shared helpers, but English-only formulas should be interpreted only for English prose.

What does the stopword option do?

It removes common function words such as the, and, and selected Korean particles so stronger content terms are easier to see.