Free SEO Tool

Free Keyword Density Checker

Paste any content to see keyword frequency, density percentage, and an instant over-optimization signal. No sign-up required.

Your content

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Target keyword (optional)

Phrases:

Ignore common stop words

How to use the keyword density checker

1. Paste your content

Drop your article, blog post, or page copy into the box. Everything runs in your browser, so your text never leaves your device.

2. Add a target keyword

Optionally enter the keyword you are optimizing for to get its exact count, density percentage, and an optimization signal.

3. Read the results

See the most frequent single words and two and three-word phrases, each with a count and density percentage you can copy.

What is keyword density?

Keyword density is the percentage of times a keyword appears in your content relative to the total word count. It is calculated with a simple keyword density formula: divide the number of keyword occurrences by the total number of words, then multiply by 100.

For example, if the phrase "keyword density checker" appears 6 times in a 600-word article, the keyword density percentage is (6 / 600) x 100, which equals 1%. This free keyword density checker runs that calculation for single words and for two and three-word phrases at once.

Tracking density helps you confirm a page is clearly about its topic without tipping into keyword stuffing, which is one of the oldest signals search engines use to detect low-quality, over-optimized pages.

Why keyword density matters in SEO

Keyword density in SEO is best treated as a health check rather than a ranking lever. Modern search engines understand synonyms, context, and search intent, so stuffing a page with exact-match keywords no longer works and can actively hurt you.

Still, density gives you a fast read on two failure modes. Too low, and the page may not signal its topic strongly enough to compete. Too high, and you risk looking manipulative. Keeping your primary keyword in a natural 0.5% to 2.5% range, supported by related terms, is a reliable on-page baseline.

Density is just one input. Pair it with strong content, clear headings, and a clean URL structure for the full on-page picture.

Keyword density best practices

Write for readers first

Draft naturally, then check density. Copy that reads well almost always lands inside the healthy range on its own.

Use the keyword early

Include your primary keyword in the first 100 words and at least one heading so the page signals its topic clearly.

Lean on related terms

Mix in synonyms and related phrases instead of repeating the exact keyword. This raises relevance without inflating density.

Watch long-tail phrases

Two and three-word phrase density matters too. A repeated phrase can look spammy even when single-word density looks fine.

Frequently asked questions

What is a good keyword density percentage?

A good keyword density is generally between 0.5% and 2.5% of the total word count. That range keeps your target keyword visible to search engines without reading as unnatural. There is no exact number Google rewards, so treat it as a guardrail rather than a target to hit precisely. This keyword density checker flags anything below 0.5% as under-optimized and anything above 2.5% as over-optimized.

What is the ideal keyword density?

The ideal keyword density depends on the length and topic of your content, but most SEOs aim for roughly 1% to 2% for the primary keyword. Rather than forcing a fixed percentage, write naturally for the reader, then use this tool to confirm the keyword appears often enough to signal relevance but not so often that it looks like keyword stuffing.

Does keyword density matter anymore?

Keyword density is no longer a direct ranking factor the way it was in early SEO, and modern search engines understand synonyms and context. It still matters as a sanity check: if your keyword density is near zero, the page may not clearly signal its topic, and if it is very high, you risk an over-optimization or keyword stuffing penalty. Use density as a diagnostic, not a lever you crank.

What is the keyword density formula?

The keyword density formula is: (number of times the keyword appears divided by the total number of words) multiplied by 100. For example, a keyword used 8 times in a 1,000-word article has a density of (8 / 1000) x 100 = 0.8%. For multi-word phrases, count each full phrase occurrence as one instance. This tool applies that exact formula for both single words and phrases.

What is 1% keyword density?

A 1% keyword density means your keyword makes up one out of every 100 words. In a 1,000-word article that is 10 occurrences, and in a 500-word article it is 5 occurrences. One percent sits comfortably inside the natural 0.5% to 2.5% range, so it is usually a safe target for a primary keyword.

What is keyword density in 1,000 words?

In a 1,000-word piece, each occurrence of a single keyword adds 0.1% to its density. So 5 uses is 0.5%, 10 uses is 1%, and 20 uses is 2%. To stay inside the recommended range, aim for roughly 5 to 25 mentions of your main keyword across 1,000 words, spread out so the copy still reads naturally.

How do I reduce keyword density?

To reduce keyword density, replace some exact-match uses of the keyword with synonyms, pronouns, or related terms, and break long keyword-heavy sentences into more natural phrasing. Removing the keyword from places where it is not needed, such as repeated subheadings, also helps. Re-run this checker after editing to confirm you have dropped back below 2.5%.

What is the 80 20 rule of SEO?

The 80/20 rule of SEO is the idea that roughly 80% of your results come from 20% of your efforts, so you should focus on the highest-impact work first: solid keyword targeting, strong content, and clean on-page optimization. Keyword density is part of that 20% of on-page basics worth getting right, but it should never come at the expense of readability or genuinely useful content.

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