Write or paste your article in the box below. Enter the keyword or keyphrase you want to check. Then hit Analyze. You’ll see the keyword density percentage, how many times the keyword appears, whether it shows up early in the content, and a full list of your most-used words.
Analyze Your Content
Paste your article or content below, enter your target keyword or keyphrase, then click Analyze. Results are instant — no page reload.
Top 10 Most Used Words
Common stop words (the, is, and, etc.) are excluded.
| # | Word | Frequency | Density % |
|---|
Content Preview — Keyword Highlighted
Every instance of your target keyword is highlighted below.
What Is Keyword Density and Why Does It Matter
Keyword density is the percentage of times a keyword appears in a piece of content compared to the total word count. It’s one of the signals search engines use to understand what your content is about.
If a keyword appears too rarely, search engines may not connect your page to that topic. If it appears too often, it can look like keyword stuffing, which can hurt your rankings. A density of 0.5% to 2.5% is generally considered the healthy range for most content.
Getting this right matters whether you’re writing a blog post, a product page, a landing page, or any content meant to rank on Google or Bing.
What This Keyword Density Checker Tool Does
This tool reads your content and gives you a full breakdown of keyword usage. It works entirely in your browser. Nothing is sent to a server.
Here’s what you get after each analysis:
- Keyword Density % – exact percentage, calculated as keyword count divided by total words, rounded to two decimal places
- Keyword Frequency – the exact number of times the keyword or keyphrase appears in your content
- Keyword Prominence – whether your keyword appears in the first 100 words (an important on-page SEO signal)
- Keyword in First Paragraph – whether the keyword shows up in your opening paragraph
- Total Word Count – the full word count of your pasted content
- Top 10 Most Used Words – a frequency table of your most repeated words, with common stop words like “the,” “is,” and “and” filtered out automatically
- Content Preview with Highlights – your full text is shown with every keyword instance highlighted so you can see exactly where it appears
- Density Status Indicator – a color-coded signal showing whether your density is Ideal (green), Slightly High (yellow), or in Keyword Stuffing territory (red)
How to Use the Tool
- Paste your article or content into the large text area
- Type your target keyword or keyphrase into the keyword field
- Click the Analyze button
- Read your results – density percentage, frequency, prominence, and first paragraph check all appear instantly
- Scroll down to see the Top 10 words table and the highlighted content preview
- If you need to start over, click Clear to reset everything
The results update in real time. No page reload happens at any point.
Who Can Use This Tool
This tool is built for anyone who writes content meant to rank on search engines.
SEO writers and bloggers use it to make sure their target keyword is present at the right frequency before publishing. Content marketers use it to audit existing pages and spot over-optimized sections. Copywriters check whether a keyword appears early enough in the content to signal relevance. Students and researchers use it to understand how keyword distribution works across a piece of writing. Developers and webmasters use it to review pages before technical SEO audits.
If you work with AI tools to generate content, this checker is especially useful. AI-generated text sometimes overuses certain phrases. You can paste the output here and catch any repetition before it goes live. If you need help writing better prompts to generate cleaner content, try the AI Prompt Generator on SeriesWire.
Frequently Asked Questions
What is a good keyword density percentage?
Most SEO practitioners recommend staying between 0.5% and 2.5%. This tool marks that range as Ideal. Above 2.5% and up to 4% is flagged as slightly high. Above 4% is flagged as a keyword stuffing warning.
Does keyword density directly affect Google rankings?
Google has said it does not use a fixed keyword density score as a ranking factor. But keyword frequency and placement still influence how well a page gets associated with a topic. A keyword that never appears, or appears only once in 2,000 words, may not rank well for that term. Natural, well-placed usage tends to perform better than forced repetition.
What is keyword prominence in SEO?
Keyword prominence refers to where in your content the keyword first appears. A keyword in the first 100 words or the opening paragraph sends a stronger relevance signal than one that only appears near the end of the page. This tool checks both and shows you a clear Yes or No for each.
Can I check a multi-word keyphrase?
Yes. You can enter a full keyphrase like “content marketing strategy” or “free keyword density checker tool” into the keyword field. The tool will count how many times that exact phrase appears in your content and calculate density accordingly.
Why are some common words not showing in the Top 10 table?
The Top 10 table filters out stop words. Stop words are common words like “the,” “a,” “is,” “in,” “and,” “or,” and many others that carry no topical meaning. Removing them gives you a cleaner picture of which meaningful words you use most.
Does this tool store or send my content anywhere?
No. All analysis runs in your browser using JavaScript. Your text never leaves your device. Nothing is saved or transmitted.
Is this tool free to use?
Yes, completely free. No account needed. No usage limits.
How is keyword density calculated?
The formula is simple. Take the number of times the keyword appears, divide it by the total word count, then multiply by 100. For example, if your keyword appears 10 times in a 1,000-word article, the density is 1.00%.
Where can I find ready-made prompts to help me write better SEO content?
The AI Prompt Library on SeriesWire has a growing collection of prompts for content writing, SEO, marketing, and more.