Free Keyword Density Checker for URL or Text

Analyze keyword density for a webpage URL, pasted text, or a text file, with one-word through four-word phrase tables and SEO placement signals.

Analyze URL or Text

Runs in your browser. We do not upload, store, or read pasted text or local text files.

Filters

Tip: Ctrl/Cmd + K focuses the active input. Ctrl/Cmd + Enter runs the check.

Results

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Understanding Keyword Density

Keyword density is the frequency of a word or phrase compared with the total word count. It is useful for spotting repetition, checking whether a draft covers its main topic, and comparing body copy with SEO elements such as the title, meta description, headings, image alt text, and links.

Formula and worked example

For a single word, this checker uses: keyword density = keyword occurrences / total words x 100.

Example: a 500-word article where the keyword appears 10 times has a density of 10 / 500 x 100 = 2%.

For multi-word phrases, the report shows occurrence density (phrase matches divided by total words) and word-share density (phrase matches multiplied by phrase length, then divided by total words). A two-word phrase used 10 times in 500 words is 2% by occurrence density and 4% by word-share density.

How to use this tool

  1. Choose Text mode for pasted copy or local files, or URL mode for a live webpage audit.
  2. Enter target keywords if you want a focused check, or leave the field blank to review the top detected terms.
  3. Use stop-word filtering, minimum word length, number filtering, and custom exclusions to remove repeated navigation labels, brand terms, or irrelevant words.
  4. Review the one-word, two-word, three-word, and four-word tables, then check whether important terms appear in the title, meta description, headings, image alt text, and link text.

How to use keyword density without keyword stuffing

Start with intent

Use the primary keyword enough to make the topic clear, but make the page answer the searcher's actual question first.

Primary term

Use related language

Add synonyms, entities, and closely related phrases instead of repeating the exact same wording in every paragraph.

Topical breadth

Check placement

A term in the title, meta description, H1, or H2 can be more useful than another repeated body mention.

SEO elements

Review high densities

There is no exact ideal percentage, but repeated terms above about 3% are worth reading aloud for natural flow.

Overuse check

Keep readability first

If a sentence sounds forced, revise it. Density is a diagnostic metric, not a writing target.

Readability

Keyword Density FAQ

What is keyword density?

Keyword density is the frequency of a word or phrase compared with the total word count, usually shown as a percentage.

How is keyword density calculated?

For a single word, divide the number of occurrences by total words and multiply by 100. For phrases, this tool shows both occurrence density and word-share density.

What keyword density is good?

There is no exact ideal density. Use the percentage as a diagnostic signal, review repeated terms above about 3%, and keep the writing natural.

Does keyword density still matter for SEO?

Keyword density can help reveal topical focus and repetition, but search engines also evaluate intent, relevance, structure, links, entities, and overall content quality.

Can keyword stuffing hurt rankings?

Yes. Repeating a keyword unnaturally can make content harder to read and may be treated as over-optimization.

Is pasted text private?

Yes. Pasted text and local text files are processed in your browser. They are not uploaded, stored, or read by Starlight Tools.

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