Paste your article into the box below. Enter the keyword or keyphrase you want to check. Hit Analyze. You will see your density percentage, how many times the keyword appears, whether it shows up early in the content, your most used words, a heatmap of where the keyword appears, and your top two word and three word phrases. You can also swap the keyword for a new one right inside the tool, without editing your draft by hand.
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 % |
|---|
Keyword Distribution Heatmap
Shows where your keyword appears across the content. The text is split into 10 equal segments from start to finish. Darker and longer bars mean more occurrences in that segment — a well-distributed keyword spreads across several segments rather than clustering in one.
Top Phrases (Bigrams & Trigrams)
The most frequent 2-word and 3-word phrases in your content. Common stop words are filtered out, but phrases can contain them if at least one meaningful word is present. Highlighted phrases contain your target keyword.
Top 2-Word Phrases
| # | Phrase | Freq | Density % |
|---|
Top 3-Word Phrases
| # | Phrase | Freq | Density % |
|---|
Content Preview — Keyword Highlighted
Every instance of your target keyword is highlighted below.
Replace Keyword
Swap the target keyword for another phrase. Choose which occurrences to update, preview the diff, then apply.
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. Search engines use this to figure out 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 between 0.5% and 2.5% is generally considered healthy for most content.
This matters for blog posts, product pages, landing pages, or any content meant to rank on Google or Bing.
What This Tool Does
This tool reads your content and gives you a full breakdown of keyword usage. Everything runs in your browser. Nothing is sent to a server.
Here is what you get after each analysis.
Keyword Density. The exact percentage. It is 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. This is 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. Common stop words like “the,” “is,” and “and” are filtered out automatically.
Keyword Distribution Heatmap. A visual chart that shows where your keyword appears across the content. The text is split into 10 equal segments from start to finish. Each segment gets a bar showing how many times the keyword lands there. A well optimized article spreads the keyword across several segments instead of clustering it in the intro or one section. Most free keyword density tools do not offer this. It is also one of the fastest ways to spot keyword over optimization.
Top Phrases. Two side by side tables showing your most frequent two word and three word phrases. Single words only tell part of the story. Search engines rank pages for phrases and topics, not just individual words. If “content marketing” shows up 8 times, that tells you more about your content focus than seeing “content” and “marketing” counted separately. When your target keyword appears inside a phrase, it gets highlighted in orange so you can check your phrase usage at a glance.
Content Preview with Highlights. Your full text is shown with every keyword instance highlighted. You can see exactly where it appears.
Density Status Indicator. A color coded signal showing whether your density is Ideal in green, Slightly High in yellow, or in Keyword Stuffing territory in red.
Built in Keyword Replacement. After the analysis runs, you can swap the target keyword for a new one right inside the tool. Replace every occurrence, only the first few, or pick specific instances from a list. The tool keeps the original casing. So if your draft says “Content Marketing” and you replace it with “digital marketing,” the result is “Digital Marketing.” You can preview the diff before applying. You can undo with one click. This turns the tool from a checker into an editor. You can test different keyword targets without ever leaving the page.
How to Use the Tool
Paste your article into the large text area. Type your target keyword or keyphrase into the keyword field. Click Analyze.
Your results appear instantly. You will see the density percentage, frequency, prominence, first paragraph check, heatmap, and top phrases.
Scroll down for the Top 10 words table, the distribution heatmap, the bigram and trigram tables, and the highlighted content preview.
If you want to change the target keyword, use the Replace Keyword panel. Choose your mode, preview the diff, then click Apply replacement. The tool re-analyzes automatically with the new keyword.
If you need to start over, click Clear. Results update in real time. There is no page reload at any point.
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 keyword stuffing.
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 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 a clear Yes or No for each.
What is the keyword distribution heatmap and how do I read it
The heatmap splits your content into 10 equal segments from start to finish. Each segment is shown as a row with a horizontal bar. The longer and darker the bar, the more times your keyword appears in that part of the text. If one segment has a very long bar and the others are empty, your keyword is clustered, usually in the introduction. Ideal distribution spreads the keyword across several segments. This matches how a human writes about a topic. It is the fastest way to spot unnatural keyword placement.
What are bigrams and trigrams, and why do they matter
A bigram is a two word phrase like “content marketing” or “email list.” A trigram is a three word phrase like “best content marketing” or “how to write.” Search engines do not just look at individual words. They understand phrases and topics. If your target keyword is “content marketing” but your bigram table shows “content” and “marketing” appearing separately and rarely together, your phrase usage is weak. The bigram and trigram tables show you which phrases your content leans on. You can then align your writing with the query you actually want to rank for.
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 counts how many times that exact phrase appears in your content and calculates density accordingly.
Can I replace the keyword after checking its density
Yes. The built in keyword replacement panel lets you swap the target keyword for another one without editing your text by hand. You can replace all occurrences, only the first few, or pick individual instances from a list. The tool keeps the original casing. If your draft says “Content Marketing” and you replace it with “digital marketing,” the result is “Digital Marketing.” You can preview the diff before applying. You can undo the change with one click.
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. The same filter applies to the bigram and trigram tables. A phrase made entirely of stop words, or one that begins and ends with a stop word, is excluded.
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. The keyword replacement happens entirely on your machine as well. Nothing is sent to any server.
Is this tool free to use
Yes. Completely free. No account needed. No usage limits. No paywalls.
How is keyword density calculated
The formula to calculate keyword density 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 an article of 1,000 words, the density is 1.00%.
Does this work for content in languages other than English
The density, frequency, prominence, and replacement features work in any language. The Top 10 words table, bigram and trigram tables, and stop word filtering are currently tuned for English. Content in other languages is still analyzed, but the stop word list is English only for now.