Free Keyword Density Checker
Updated September 2026
Analyse single-keyword frequency and density in any text. See the top 25 keywords ranked by count and percentage — free online keyword density tool.
Diagnosing web and network issues quickly is critical for site owners, developers, and SEO professionals. The Keyword Density Checker delivers actionable data in seconds.
Analyse single-keyword frequency and density in any text. See the top 25 keywords ranked by count and percentage — free online keyword density tool. Results are immediate — no waiting, no loading screens, no account required.
Who uses the Keyword Density Checker?
- SEO writers doing a quick single-keyword frequency check before publishing articles.
- Content marketers spotting over-repeated words in existing pages.
- Students learning SEO fundamentals and basic keyword frequency analysis.
Common uses and search terms
The Keyword Density Checker is frequently used for: keyword density, seo, keyword frequency. Whether you need a quick result or are working through a longer project, the tool handles all common variations without any configuration.
Why use Allio Tools's Keyword Density Checker?
Everything runs locally in your browser. No data is sent to a server, logged, or stored anywhere. The tool is completely free with no usage limits, no premium tiers, and no account required. Available in 11 languages and optimised for all screen sizes, the Keyword Density Checker works on desktop, tablet, and mobile with no app download needed.
See also:IP Address Lookup · Website Speed Test · DNS Lookup
How the Keyword Density Checker works
Paste your article or web page content into the text area.
Click Analyze to compute keyword frequency and density percentage for individual words.
View the top 25 keywords ranked by frequency, each with count, density percentage, and a relative bar chart.
Stop words (the, and, is, etc.) are filtered out automatically — there's no toggle to include them.
Tips & tricks
- This is single-word analysis only — there's no bigram or trigram (multi-word phrase) breakdown, so a repeated two-word phrase shows up only as two separate single-word counts.
- Stop words (the, and, is, to, of, etc.) are always filtered out — there's no toggle to see raw unfiltered word counts.
- Words of 2 characters or fewer are excluded automatically along with stop words, so very short acronyms may not appear.
- The results table caps at the top 25 keywords by frequency — for a full breakdown of every unique word, you'd need a different tool.
Frequently Asked Questions
What is keyword density and is it an SEO ranking factor?
Keyword density is the percentage of times a keyword appears relative to total word count. It is NOT a direct Google ranking factor — Google has not used keyword density as a signal since 2003. Focus on natural writing and topic coverage instead.
What keyword density percentage should I target?
There's no magic number. A natural density of 0.5%–2% for primary terms is common in well-written content. Anything above 3–4% for a single term risks looking like keyword stuffing. Write for humans, not for a density target.
Does this tool analyse two-word or three-word phrases (bigrams/trigrams)?
No — this tool counts single words only. It doesn't detect multi-word phrases like "best practices" or "easy to use" as a unit; each word in a phrase is counted separately.
Does keyword placement matter more than density?
Yes. Keywords in the title, H1, first 100 words, and headings signal topic relevance more strongly than repetition throughout the body. One mention in the H1 outweighs ten mentions in the footer — this tool only measures overall frequency, not placement.
How many keywords should I target in a single article?
Target one primary keyword and 3–5 closely related secondary keywords per article. Targeting too many unrelated terms dilutes topic focus. Related terms should appear naturally in explanatory content, not forced in.
Is my data safe when using the Keyword Density Checker?
Completely safe. The Keyword Density Checker processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
How current is the data returned by the Keyword Density Checker?
The Keyword Density Checker fetches live data in real time each time you run it. Results reflect the current state of the server or domain at the moment of the request.
Why does the Keyword Density Checker sometimes return different results than other tools?
Results depend on the real-time state of the target server and DNS propagation, which can vary by geographic region and caching TTL. If you see inconsistencies, wait a few minutes and re-test — DNS changes can take up to 48 hours to propagate fully worldwide.
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