Keyword Density Checker Live
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About This Keyword Density Checker
What This Tool Analyzes
This tool processes any block of text in the browser — no server upload required. It tokenizes your content, removes stopwords (optionally), and computes keyword frequency and density for every word simultaneously. Results update live as you type. Six analysis tabs give you a complete on-page SEO picture.
- Keyword density % — (word count ÷ total words) × 100 for every token
- SEO status per keyword — Low, Good, High, or Keyword Stuffing based on density thresholds
- Bigrams & trigrams — recurring 2- and 3-word phrases for LSI keyword discovery
- Top-5 keyword highlight — color-coded visual overlay of your leading keywords in context
- Word cloud — words sized proportionally to frequency; click any word for stats
- 150+ stopword list — English function words filtered by default; toggle off for technical content
- Export to CSV, JSON, TSV, Markdown — download results for spreadsheets or audits
How to Use This Tool
- Paste or type your article, blog post, product description, or any text into the input box — analysis begins immediately
- Click Sample text to load a pre-written SEO article and explore all features instantly
- Toggle Filter stopwords on to exclude words like "the", "is", "and" from results
- Set Min word length to filter out short tokens (default: 2 characters)
- Use Find specific keyword to check any target keyword's count, density, and SEO status without scrolling the table
- Switch to the Bigrams & Trigrams tab to find recurring multi-word phrases (long-tail keyword opportunities)
- Click the Highlight tab to visually inspect where your top keywords appear in the text
- Export to CSV for tracking keyword density over time, or JSON for programmatic processing
Keyword Density in SEO — Reference Guide
Density Formula
Keyword Density = (Keyword Count ÷ Total Words) × 100. A 500-word article where "SEO" appears 5 times has a density of 1.0%. This tool calculates density against the filtered word count (stopwords excluded) to give a more realistic SEO signal.
Density Scale
| Range | Status |
|---|---|
| < 0.5% | Low |
| 0.5–2.5% | ✓ Good |
| 2.5–4% | High |
| > 4% | ⚠ Stuffed |
Above 4% risks triggering Google's Panda algorithm. Aim for the 1–2% range for primary keywords.
Bigrams & LSI
Bigrams (2-word phrases) and trigrams (3-word phrases) that recur across your content are signals of topical depth. Google uses these co-occurrence patterns to understand semantic context. Including recurring phrases in headings and the first paragraph reinforces topical authority without increasing single-keyword density.
Modern SEO Guidance
Google's algorithms now evaluate semantic relevance, not keyword counts. The practical rule: write for your reader first, then verify that your primary keyword appears in the title, first 100 words, at least one subheading, and the meta description. Use this tool to catch accidental stuffing — not to target a magic number.
Keyword Density FAQ
Keyword density is the percentage of times a specific keyword appears in a piece of content relative to the total word count. The formula is: Keyword Density = (Keyword Count ÷ Total Words) × 100. For example, if the word "SEO" appears 5 times in a 500-word article, its density is (5 ÷ 500) × 100 = 1.0%. This tool calculates density for every word in your text simultaneously and displays results in a ranked, sortable table.
The generally accepted ideal range is 0.5% to 2.5%. Below 0.5% is low presence — the keyword may not register as relevant to search engines. Between 0.5% and 2.5% is optimal — natural use that signals relevance without appearing manipulative. Between 2.5% and 4% is high and may read as forced. Above 4% is keyword stuffing, which can trigger Google's Panda algorithm and result in ranking penalties. Most SEO professionals target 1–2% for a primary keyword.
Bigrams are two-word phrases (e.g. "keyword density") and trigrams are three-word phrases (e.g. "keyword density checker"). In SEO, analyzing these multi-word phrases helps identify long-tail keywords and LSI (Latent Semantic Indexing) keywords that appear naturally in your content. Recurring bigrams and trigrams signal topical depth and are increasingly important for modern semantic search — they tell Google which phrases are associated with your page's topic beyond the primary keyword.
Keyword stuffing is the practice of artificially overloading a webpage with a target keyword to manipulate search rankings. It is identified when a keyword's density exceeds approximately 4% of the total word count. Signs include unnatural repetition, keywords inserted in places that disrupt reading flow, and hidden text with repeated keywords. Google's Panda algorithm specifically targets keyword-stuffed content and can demote or penalize the page. This tool flags keywords above 4% density with a red "⚠ Stuffed" badge in the SEO Status column.
Stopwords are common function words like "the", "is", "at", "which", "and", "of" that carry little semantic meaning on their own. Filtering them focuses the analysis on content words — nouns, verbs, adjectives — that actually influence search rankings. This tool includes 150+ English stopwords that are filtered by default. You can toggle the filter off for non-English content, specialized technical text, or when you specifically want to analyze pronoun and preposition usage patterns.
Keyword density analysis helps on-page SEO in several practical ways: (1) It identifies over-optimized keywords that risk keyword stuffing penalties. (2) It reveals under-used target keywords that need more prominence. (3) The bigrams and trigrams analysis surfaces naturally occurring long-tail phrases to reinforce in headings and meta descriptions. (4) The "Find specific keyword" feature confirms whether a target keyword is present before publishing. (5) Comparing your content's keyword profile against competitors can guide content gap analysis and optimization priorities.
Keyword density as a precise optimization target matters less than it did in the early 2010s. Google now understands semantic context, user intent, and topical authority. However, density still matters in two ways: a keyword must appear enough times to establish topical relevance, and a keyword that appears too frequently signals low-quality or manipulative content. The practical guidance: use your primary keyword in the title, first 100 words, at least one H2, and the meta description — then let density settle naturally around 1–2% rather than forcing a specific number.