Keyword Density Checker

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This is one of several seo tools. For the full list of utilities, see All tools.

Keyword density is the percentage of times a target keyword appears in a piece of content relative to the total word count. It is one of the oldest SEO metrics, and one of the most misunderstood. In the early 2000s, search engines used it as a primary ranking signal, and SEO writers chased specific densities (often "2-3%") as a magic number. Modern search engines barely use density as a direct signal, they use it to detect spam, not to reward optimisation, but the metric remains useful as a sanity check on your writing.

The ToolzPedia Keyword Density Checker analyses any text or URL and reports the frequency and density of single words, two-word phrases (bigrams), and three-word phrases (trigrams). It excludes common stop-words by default ("the," "and," "of," etc.) and runs entirely in your browser.

Use the tool to check that your primary keyword appears naturally in your content (target 0.5-2.0%), to spot accidental keyword stuffing, to see what topics your content actually covers (sometimes surprising), and to compare your draft against competing content.

Use the tool edit

Paste your text or article

How to use Keyword Density Checker edit

Follow these steps to use the tool:

  1. Paste your text or enter a URL

    Either works, paste a draft, or enter a URL to analyse a published page.

  2. Choose stop-word filter

    Default English stop-words are excluded; you can disable this for raw frequency.

  3. Click Analyze

    Results appear within a second.

  4. Review the rankings

    Single words, bigrams, and trigrams are shown with their counts and densities. Look for your target keyword in the top 5; verify nothing unintended dominates.

Details edit

📈 Density Targets
  • 1-3%, ideal for primary keyword
  • 0.5-1%, secondary keywords
  • 3-5%, borderline, watch out
  • 5%+, keyword stuffing, hurts SEO

Frequently asked questions edit

There is no single ideal, modern algorithms prefer natural language. As a rough guide, 0.5-2.0% for the primary keyword is natural; above 3-4% looks like spam.
Less than it used to. Modern algorithms use it mainly to detect spam (high density), not to reward optimisation. Topical coverage and content quality matter much more.
Both. URL analysis fetches the page server-side and analyses the visible text.
By default yes, common words like "the," "and," "of" are excluded. You can disable this if you want raw frequency.
Currently you can copy the table; CSV export is on the roadmap.

Use cases edit

Checking your draft for natural keyword usage

Confirming your primary keyword appears 5-10 times in a 1500-word post without dominating.

Spotting accidental keyword stuffing

A density above 4-5% looks like spam to modern algorithms.

Comparing draft against competing content

Run a top-ranking competitor through the tool to see what natural density looks like for the topic.

Finding topic gaps

If your content barely mentions related terms (e.g., a pizza recipe with no mention of cheese, dough, or oven), it may not cover the topic deeply enough for search.

Checking for unintended brand mentions

Confirming that your competitor's name doesn't accidentally outrank yours within your own post.

How it works edit

The tool tokenises the input text, removes punctuation, lowercases everything for case-insensitive matching, and removes a configurable list of stop-words (the, and, of, in, etc.). It then counts single-word, bigram, and trigram frequencies and computes density as (count / total_word_count) * 100.

For URL inputs, the tool fetches the page (server-side, since browsers cannot fetch arbitrary URLs due to CORS), strips HTML tags, and runs the same analysis on the visible text. This lets you check competing pages quickly without copy-pasting.

Tips and best practices edit

  • For most posts, the primary keyword should appear 0.5-2.0% of the time. Higher than 3% looks unnatural; lower than 0.3% may signal weak topical focus.
  • Bigrams and trigrams are often more revealing than single words, a post about "machine learning" should show that exact phrase, not just "machine" and "learning" separately.
  • Modern SEO is about topical depth, not keyword density. Coverage of related concepts (which the tool shows in the top 20 phrases) often matters more than primary-keyword frequency.
  • Use the tool to compare your draft against the current top-ranking pages for your target keyword. Match the natural pattern, do not aim for a specific number.

Common mistakes edit

Targeting a specific density number

The "2-3% rule" is from 2008. Modern algorithms care about natural language, not density.

Stuffing keywords to "boost" rankings

Stuffing is detected and penalised by every modern algorithm. Write naturally and aim for topical coverage.

Ignoring bigrams and trigrams

Single-word density is less informative than phrase density. A post about "best running shoes" needs that phrase, not just "shoes."

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See also edit