Keyword Density Checker
Analyze keyword frequency and density
Count ASCII letter-and-digit tokens of at least three characters and their share of retained tokens. Chinese word segmentation and target-density scoring are not provided.
The full guide also includes pitfalls, worked examples, snippets, FAQs, and related tools for checking results or troubleshooting.
About this tool
Count ASCII letter-and-digit tokens of at least three characters and show the 20 most frequent tokens. Text is lowercased, punctuation and non-ASCII characters become separators, and short tokens are excluded from both counts and the denominator. This measures this specific token set, not topic coverage, readability, Chinese word segmentation or search quality.
Suggested Workflow
Content SEO Quick Audit Before You Publish
A lightweight checklist to catch technical and on-page SEO misses in minutes.
Content QA: Check Counting Rules, Repetition and the Published Draft
Use a seven-word sample, a keyword denominator check and a revision comparison to verify a draft without treating word count as a quality score.
Production Snippets
Inspect the denominator before using a percentage
text
API api tools to go 中文
Retained tokens: api, api, tools
api: 2 / 3 = 66.67%
tools: 1 / 3 = 33.33%Frequently Asked Questions
How is the percentage calculated?
Token occurrences divided by all retained tokens, multiplied by 100 and rounded to two decimals. There is no custom keyword field, phrase matching or ideal-density target.
Why is Chinese-only input empty?
The current tokenizer retains only ASCII a–z, digits and whitespace. Chinese text is excluded; accented words can split into fragments. Use language-aware analysis for those texts.
Should I repeat a word to raise this percentage?
The count does not establish relevance or quality and predicts neither rankings nor AdSense approval. Use it to inspect repetition in supported text, not as a publishing threshold.
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