Keyword Density Checker for SEO Content
This keyword density checker measures how often each word and phrase appears in your text so you can fine-tune your on-page SEO. Paste an article, blog post, or HTML page and the analysis runs instantly, showing the count and density percentage for every term.
Keyword density is the share of total words that a given keyword takes up. It is no longer a direct ranking factor, but a natural balance still matters: too few mentions can leave a page looking off-topic, while keyword stuffing can hurt rankings. This tool helps you find that balance with n-gram analysis, stop-word filtering, and a target-keyword rating.
How to Check Keyword Density
Paste your content
Drop your article, blog post, or any text into the editor on the left. You can paste plain text or raw HTML copied straight from a web page.
Set your options
Turn on Strip HTML to analyze only the visible text from pasted markup. Keep Filter Stop Words on to hide common words like "the", "a", and "is" from the single-word results.
Review the results
The analysis updates as you type. Switch between the 1-Word, 2-Word, and 3-Word tabs to see each keyword's count and density, plus stat cards for total words, unique words, sentences, and average word length.
Check your target keyword
Type your focus keyword in the target field to see its exact count, density percentage, and a rating of Low, Good, or High so you know whether to use it more or less.
Highlight and export
Click any keyword in the table to highlight every occurrence in your text, then use the CSV button to export the current tab's results for your records.
Features
Real-Time Analysis
Density updates automatically as you type or edit, with no button to press and nothing to reload.
N-Gram Analysis
Inspect single words, two-word phrases, and three-word phrases to catch both keywords and long-tail patterns.
Stop-Word Filter
Hide common English words like "the", "and", and "for" so your results focus on the keywords that matter.
Target Keyword Checker
Enter a focus keyword to get its count, density, and a Low / Good / High rating for instant guidance.
Click-to-Highlight
Tap any keyword in the table to highlight every occurrence in your text and see its distribution at a glance.
Stuffing Warnings
Density above 3% turns the bar red with a warning badge, while the 2-3% range shows a yellow caution bar.
Text Statistics
See total words, unique words, sentence count, and average word length alongside every analysis.
HTML Support
The Strip HTML option removes tags before analysis so you study only the visible, indexable text.
CSV Export
Export the current tab's rank, keyword, count, and density to a CSV file for reports or further review.
Frequently Asked Questions
What is keyword density?
Keyword density is the percentage of total words in a piece of content that a specific keyword or phrase makes up. It shows how often you use a term relative to the overall length of the text.
How is keyword density calculated?
The formula is: density (%) = (times the keyword appears ÷ total words) × 100. For example, a keyword used 5 times in a 500-word article has a density of 1.0%. This tool runs the calculation for you on every word and phrase.
What is a good keyword density percentage?
Most SEO guidance suggests keeping a primary keyword between roughly 0.5% and 3%. That range usually reads naturally while still signaling relevance. The target checker rates this band as "Good", flags anything under 0.5% as "Low", and warns about over-optimization above 3% as "High".
Does keyword density still matter for SEO?
It is no longer a direct ranking factor, but it remains a useful sanity check. Search engines reward natural, relevant writing, so the goal is balance: enough use to stay on-topic without stuffing. Treat the rating as a guideline rather than a strict rule.
What is keyword stuffing?
Keyword stuffing is cramming a keyword into content unnaturally to try to manipulate rankings, a practice search engines penalize. When a keyword's density rises above 3%, the table flags it with a red bar and a warning badge so you can dial it back.
Should I analyze 1-word, 2-word, or 3-word phrases?
All three help. Single words reveal your most-used terms, while two- and three-word phrases surface long-tail keywords and natural phrasing that is often more specific and less competitive. Switch tabs to compare each level.
What are stop words and should I filter them?
Stop words are high-frequency words such as "the", "a", "is", and "and" that appear in almost any text. Filtering them keeps your single-word results focused on meaningful keywords. Keep the filter on for SEO analysis, or turn it off to see the complete word-frequency breakdown.
Does this tool work with non-English content?
Yes. Tokenization supports Unicode, so it can count words in any language. The stop-word filter, however, is tuned for English, so for other languages it helps to turn that filter off for accurate results.
Is my content stored or shared?
No. Every step happens locally in your browser and nothing is uploaded. Your text, target keyword, and exported CSV never leave your device.
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