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Free Keyword Density Checker — SEO Keyword Frequency Tool

Paste your content, enter a target keyword, and instantly see your keyword density percentage, prominence score, and tailored SEO suggestions, all client-side, no data ever leaves your browser.

Your Content

Tip: Press Ctrl+Enter (Cmd+Enter on Mac) to analyse.

Keyword Analysis
Paste your content and keyword, then click Analyse.

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How to Use the Keyword Density Checker

  1. Paste your content: copy the full text of your blog post, landing page, or any web copy into the content field.
  2. Enter your target keyword: type the exact keyword or phrase you want to optimise for (e.g. content marketing strategy).
  3. Click Analyse: the tool instantly calculates density, counts occurrences, scores keyword prominence, and generates suggestions.
  4. Review your results: use the gauge, prominence score, and suggestion list to refine your copy before publishing.

What Is Keyword Density and Why Does It Matter?

Keyword density is the percentage of times a target keyword appears in your text relative to the total word count. A density of 1% means the keyword appears once for every 100 words. While Google has moved far beyond simple keyword matching, keyword density still serves as a useful sanity check to ensure:

  • Your content clearly signals topical relevance to search engines.
  • You are not inadvertently under-optimising (keyword barely mentioned) or over-optimising (keyword stuffing).
  • Natural language patterns are maintained for a better reader experience.

What Is Keyword Prominence?

Keyword prominence measures how early your keyword first appears. Google hasn’t said that position in the text is a ranking factor, but readers and search engines both use the opening to work out what a page is about, so mentioning the main topic early is good practice. An “Excellent” score means it appears in the first 10% of your text.

What Is the Ideal Keyword Density for SEO?

There is no ideal number, and Google has never published one. Its spam policies list keyword stuffing as spam, and its SEO Starter Guide says to write naturally. As a rough guide, most well-written pages land between 0.5% and 2.5% without trying. If yours is above 3 to 4%, read it aloud: it probably sounds repetitive. The gauge colours help you spot that at a glance.

Frequently asked questions

Does Google still use keyword density as a ranking factor?

Not in a rigid, formulaic way. Google’s algorithms are far more sophisticated, using natural-language understanding and semantic signals. That said, keyword density is still a useful proxy: if your content never mentions the target keyword, it is unlikely to rank for it. Keep density natural and focus on covering the topic comprehensively rather than hitting a specific percentage.

What is keyword stuffing and why should I avoid it?

Keyword stuffing means repeating a keyword unnaturally often, for example “best running shoes” 20 times in a 300-word article. Google’s spam policies list it as spam, and it makes content hard to read. A density above 4% is a common warning sign, and the tool flags it in red.

Should I optimise for one keyword or multiple?

A single page typically targets one primary keyword and several semantically related secondary keywords. Use this tool to check your primary keyword density, then manually review that you have naturally incorporated related terms and synonyms throughout the text to support topical authority.

How is keyword prominence calculated?

This tool calculates prominence as the character position of the keyword’s first occurrence divided by the total character length of the text, expressed as a percentage. A first occurrence at position 5% through the text scores “Excellent”; first occurrence at 60% scores “Poor.” Move your keyword into the opening paragraph for best results.

Does the tool support multi-word phrases?

Yes. You can enter a single word or a multi-word phrase (e.g. digital marketing agency). The tool performs whole-word, case-insensitive matching so partial matches are not counted, keeping results accurate.

Sources

  1. Google Search Central, “Spam policies for Google web search“, accessed September 2026.
  2. Google Search Central, “SEO Starter Guide“, last updated 10 December 2025.

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