Optimizing content isn't just about repeating a word 5 times. It's about context, distribution, and relevance. The Advanced Keyword Density Checker transforms how you edit. With features like Smart Stemming to track topic coverage and Distribution Heatmaps to visualize flow, you can craft content that pleases both readers and search algorithms.
Distribution Heatmap
A visual X-ray of your content. See a timeline of keyword occurrences to fix clustering and ensure even topic coverage.
Smart Stemming
Go beyond exact matches. Automatically group "rank", "ranking", and "ranked" to measure true topical weight.
N-Gram Analysis
Detect localized keyword stuffing in 2-word (Bigram) and 3-word (Trigram) phrases that standard counters miss.
How to Optimize Like a Pro
1
Draft Naturally: Write your content first without worrying about keywords. Natural flow is priority #1.
2
Analyze & Stem: key in your text. Enable Smart Stemming to see which topics are dominant.
3
Check the Heatmap: Look at the visual bars in the table. If a keyword is clumped in one spot, spread it out.
4
Meta Verification: Open the "Page Title & Meta Description" panel. Ensure your top 1-2 keywords show green "Found" indicators.
Density Health Check
Density Range
Status
Recommendation
0% - 0.5%
Too Low
Keyword may be unnoticed. Consider adding it to headers or intro.
1% - 2.5%
Optimal
Perfect balance. The content is topically relevant but not spammy.
3% +
Stuffing
High risk of penalty. Use synonyms or rewrite sections immediately.
Frequently Asked Questions
What is a Keyword Heatmap?
A Keyword Heatmap is a visual timeline that shows exactly *where* a keyword appears in your document. It helps you identify if keywords are clustered unnaturally (stuffing) or evenly distributed for better flow.
What is "Smart Stemming" and why use it?
Smart Stemming intelligently groups word variations (e.g., "market", "marketing", "marketer") into a single count. This gives a true reflection of your topic's density, preventing you from under-optimizing just because you used different tenses.
Why should I check Meta Title & Description compatibility?
Search engines expect your primary keywords to appear in your Page Title and Meta Description. Our tool cross-checks your content against these tags to ensure you aren't missing easy ranking opportunities.
What is the ideal keyword density percentage?
While there is no "magic number," most SEOs recommend 1-2%. If a keyword exceeds 3%, it risks being flagged as spam. Our tool marks these high-risk keywords in red automatically.
Does this tool analyze phrases (Long-tail keywords)?
Yes. Use the tabs to switch between "1-Word", "2-Word" (Bigrams), and "3-Word" (Trigrams) analysis. This is crucial for detecting repetitive phrases like "best seo software" that single-word counters miss.
What are Stop Words and should I exclude them?
Stop words are common fillers like "the", "and", "in". Excluding them (default setting) allows you to focus purely on your topical keywords. Keeping them included is useful for checking natural language flow.
Does the Stemming feature work for all languages?
Currently, our Smart Stemming algorithm (Porter Stemmer) is optimized for English. For other languages, we recommend turning Stemming OFF to rely on exact word matching.
Can I analyze a large text file?
Absolutely. You can drag and drop `.txt`, `.md`, or `.json` files directly into the browser. We handle processing locally, so file size limits depend only on your device's memory.
How does this compare to paid tools like Yoast or SEMrush?
While paid tools offer broader site audits, our tool provides deeper *specific* analysis for a single piece of content, offering granular Heatmaps and Stemming that even some paid plugins lack—completely for free.
Is my content data secure?
Yes. Unlike server-based tools, this Keyword Density Checker runs 100% in your browser using JavaScript. Your text never leaves your computer.