Free tools to boost your SEO strategy
Keyword Density Checker
Analyse keyword frequency and density in your content. Find over-optimised or under-used keywords to improve your on-page SEO.
What is Keyword Density?
Keyword density is the percentage of times a keyword or phrase appears in your content compared to the total word count. This free keyword density checker analyses your text for single words, two-word phrases (bigrams), and three-word phrases (trigrams) to help you optimise your on-page SEO.
Why it matters: Search engines use keyword frequency as one of many signals to understand what your page is about. A keyword density between 1-3% is generally considered optimal. Over-stuffing keywords (above 5%) can trigger spam filters, while under-using them may cause your page to rank poorly for target search terms.
How to use: Paste your blog post, article, or webpage content above. The tool will identify the most frequently used keywords and phrases, showing their count and density percentage. Use this data to ensure your primary keywords appear naturally throughout your content, check for keyword stuffing, and discover unintentional keyword patterns. Analyse competitor content to benchmark your keyword usage against top-ranking pages.
What is the Keyword Density Checker?
Analyse the frequency and distribution of keywords within your content to ensure optimal SEO performance. Paste your text and instantly see which words and phrases appear most often, helping you maintain natural keyword usage without over-optimisation that could trigger search engine penalties.
Example: spotting keyword stuffing in a 1,000-word post
Paste a 1,000-word article and the tool counts every term and phrase. Say your focus keyword “email marketing” appears 34 times — that is a density of 3.4%, which reads as over-optimised and risks looking spammy to both readers and search engines. A natural range is closer to 0.5–1.5%, so you would trim it to roughly 10–15 mentions and lean on synonyms for the rest.
A typical blog post.
3.4% density — too high.
About 10–15 mentions here.
Key Features
Single & Multi-Word Analysis
Analyses both individual words and multi-word phrases (bigrams, trigrams) to give a complete picture of your content's keyword profile.
Density Percentages
See exact density percentages for each keyword, helping you stay within the recommended 1-3% range for primary keywords.
Word Frequency Counts
Quickly identify which terms dominate your content and whether you need to add more keyword variety or reduce repetition.
How to Use This Tool
Paste your content
Copy and paste your article, blog post, or page content into the text area.
Review the analysis
See a breakdown of the most frequent single words and multi-word phrases with their counts and density percentages.
Optimise your content
Adjust keyword frequency to stay within the recommended density range — typically 1-3% for primary keywords and 0.5-1% for secondary keywords.
Why This Matters for SEO
Keyword density helps search engines understand what your content is about. Too low, and search engines may not associate your page with relevant queries. Too high (keyword stuffing), and you risk penalties. Modern SEO best practice is to write naturally while ensuring your target keywords appear at a healthy frequency — this tool helps you find that balance.
Frequently Asked Questions
Related searches this tool helps with
Easily analyse word density in your content with our word density checker and text density analyser. This free word frequency tool lets you check word density, measure word usage, and perform a thorough word density analysis for better SEO. Use it as a word density calculator or text density checker to see word count by frequency and optimise your writing.