A keyword density checker analyzes how often words and phrases appear in your content relative to total word count. Keeping your primary keyword at 1–3% density signals topical relevance to search engines without triggering keyword stuffing penalties. This tool also shows top multi-word phrases and your content's Flesch-Kincaid readability score.
Paste Your Content
Target Keyword Analysis
Readability
Top 20 Single Keywords
Top 10 Two-Word Phrases
Top 10 Three-Word Phrases
Paste your content above to see keyword density analysis
How to Use the Keyword Density Checker
A keyword density checker is one of the most practical on-page SEO tools available. Before publishing a blog post, landing page, or product description, it is worth verifying that your primary keyword appears often enough to signal relevance — but not so often that it looks like keyword stuffing. This tool analyzes your content instantly without sending it to any server.
Step 1: Paste Your Content
Copy your full article, blog post, or web page text and paste it into the content area. Include all the body text that a search engine would index — headings, paragraphs, and bullet points. You do not need to remove HTML tags; the tool handles plain text. The longer the text, the more meaningful the density percentages will be.
Step 2: Enter Your Target Keyword
Type your primary target keyword or phrase in the "Target Keyword" field. The tool will calculate exactly how many times it appears and what percentage that represents of your total word count. A density bar shows where you fall relative to the 1–3% recommended range, along with a recommendation (too low, ideal, or too high).
Step 3: Review Top Single Keywords and Phrases
The tool generates three ranked lists: top 20 single keywords (excluding stop words like "the" and "is"), top 10 two-word phrases (bigrams), and top 10 three-word phrases (trigrams). These show which topics and terms dominate your content. If your target keyword does not appear in the top 20 single keywords, you likely need more usage. The bigrams and trigrams reveal natural keyword variations that are valuable for long-tail SEO.
Step 4: Check the Flesch Readability Score
The keyword density checker also calculates the Flesch Reading Ease score, which measures how easy your content is to read. Scores range from 0 (very difficult, like academic journals) to 100 (very easy, like children's books). For most web content targeting general audiences, a score of 60–80 is ideal. A high score means shorter sentences and simpler words — factors that also improve engagement and reduce bounce rates.
Step 5: Optimize Based on Results
Use the results to guide edits. If your target keyword density is below 1%, add a few more natural mentions throughout the content. If it exceeds 3%, identify awkward repetitions to remove or rephrase. If your readability score is below 50, consider breaking up long sentences and replacing complex words with simpler alternatives. Save and re-paste your edited content to verify improvements without leaving the page.
FAQ
Is this keyword density checker free?
Yes, completely free with no limits. You can analyze as many texts as you like without creating an account. All processing is done in your browser using client-side JavaScript — your content is never sent to a server.
Is my text content safe and private?
Absolutely. Everything runs locally in your browser. Your text is never transmitted to any server, never stored, and never shared. Close the page and your content is gone permanently. This tool is safe for confidential drafts, client work, and proprietary content.
What is keyword density and why does it matter for SEO?
Keyword density is the percentage of times a target keyword appears in relation to the total word count. It is calculated as (keyword occurrences / total words) × 100. It matters because search engines analyze your content to understand what your page is about, and appropriate keyword usage (typically 1–3%) signals topical relevance without triggering spam filters.
What is the ideal keyword density for SEO?
Most SEO experts recommend keeping your primary keyword at 1–3% density. Below 0.5% and the keyword may not signal enough relevance. Above 3–4% risks looking like keyword stuffing, which Google penalizes. This tool highlights your target keyword's density and shows whether it falls in the recommended range.
Why are common words like 'the' and 'is' excluded from the keyword list?
Very common words called stop words (the, is, and, a, in, to, of, etc.) appear in nearly all English text and provide no topical signal. Excluding them surfaces the words that actually reveal your content's subject matter, making the keyword analysis much more actionable for SEO purposes.
What is the Flesch-Kincaid readability score?
The Flesch Reading Ease score measures how easy a text is to read on a scale of 0 to 100. Scores of 70–80 are easily understood by the average reader (grade 6–7 level), scores of 60–70 are standard for general audiences, and scores below 30 are suited for academic or professional writing. For most web content targeting broad audiences, aim for 60+ for best engagement.
What are 2-word and 3-word phrases (n-grams) useful for?
Two-word and three-word phrases (bigrams and trigrams) reveal how often multi-word keyword combinations appear in your content. These are critical for long-tail SEO — phrases like 'keyword density tool' or 'best running shoes' often have lower competition and higher conversion intent than single keywords. This tool shows the top 10 bigrams and trigrams ranked by frequency.
How do I use this to improve my on-page SEO?
First, paste your page content. Then enter your target keyword in the Target Keyword field. Check that its density falls between 1% and 3%. Review the top single keywords and phrases to see if your semantic terms align with your topic. Check the readability score — pages around 60–70 tend to have better engagement metrics, which indirectly helps SEO rankings.