Zero Snippet

Keyword density checker — phrase frequency, on-page SEO prominence, TSV export

Use this free keyword density checker to measure how often target keyword phrases appear in your draft copy, expressed as a keyword density percentage relative to total word count. You also get a practical keyword prominence signal: the word position of the first match and whether that match begins inside the first 100 words of the pasted text—useful when you are auditing intros and above-the-fold body copy before publish. Paste or upload .txt / Markdown, add multiple comma-separated phrases, then copy a TSV report for spreadsheets. Everything runs locally in your browser, so confidential drafts stay on your device. Pair with our word frequency analyzer for whole-vocabulary repetition, and the meta title and description checker when you tune title tags and snippets. Browse the full SEO tools list on the home page.

Matching

Summary

Total words
73
Phrases tracked
4
Phrase#DensityFirst≤100w
keyword density25.48%1Yes
on-page SEO12.74%7Yes
prominence11.37%27Yes
semantic coverage00.00%——

Density = (occurrences × words in phrase) ÷ total words × 100. “First” is the word position of the first token in the first match. “≤100w” means that first match starts within the first 100 words.

Analysis runs in your browser. Token rules are simple heuristics—not a search-engine ranking model or NLP parser.

Why keyword density and prominence still matter for editorial QA

Modern ranking systems emphasize intent, links, and content quality, but content teams still run keyword density analysis before go-live: it catches accidental keyword stuffing, thin repetition, and intros that bury the main topic. A balanced page usually uses a focus phrase naturally in the headline, opening paragraphs, and body—without forcing the same string into every sentence. This tool does not predict rankings; it helps you read your own copy like a checklist: counts, density, and first-match placement. After you adjust wording, verify snippet lengths with the meta title and description checker and inspect live HTML fields with the meta tags extractor.

How to use this keyword density analyzer (step by step)

  1. Paste your article or landing page body into the editor. For offline drafts, click Upload file to load plain text or Markdown. Use Load sample to see how multi-word phrases are matched.
  2. Enter a primary keyword phrase (one sequence of words you want to track). Add additional phrases as a comma-separated list—secondary terms, product names, or localized variants. Each distinct phrase gets its own row in the results table.
  3. Toggle ignore case when you want “Run” and “run” to treat as the same token. The tool finds non-overlapping consecutive matches so long phrases do not double-count shared words.
  4. Read Density (occurrences × phrase length ÷ total words), First (word index of the first match), and ≤100w (whether the first match starts inside the first 100 words). Click Copy report to export TSV columns for documentation or client decks.
  5. For vocabulary-wide repetition—not just one phrase—run the word frequency analyzer, then use the find and replace tool for bulk rewrites. Confirm total length with the word counter.

Keyword density formulas and what we display

Many SEO checklists use (occurrences × words in phrase) ÷ total words × 100, which scales multi-word targets proportionally. We show that value as Density. The export also includes occurrence share (occurrences ÷ total words × 100) for comparison. Totals use whitespace tokenization with punctuation trimmed from token edges—the same practical approach as our word frequency tool—so numbers are stable for editorial review but are not a substitute for corpus linguistics or crawler data. For social previews, follow up with the Open Graph preview and Open Graph tag generator.

Internal links: structured data, hreflang, and technical SEO

Keyword placement is only one layer of on-page work. When you expand to multi-language sites, build correct clusters with the hreflang tag generator. For rich results testing, draft JSON-LD with the schema markup generator. Control crawling with the robots.txt generator and XML sitemap generator, then validate redirects using the redirect type checker.

Related SEO tools on Zero Snippet

Explore utilities under SEO tools:

  • Meta Title & Description Checker — Check title and meta description lengths against common search snippet limits before publish.
  • Readability Score Checker — Run Flesch-Kincaid style analysis with grades and suggestions for clearer content.
  • robots.txt Generator — Build a valid robots.txt with allow/block rules and sitemap URL for crawler control.
  • XML Sitemap Generator — Turn a URL list into a standards-compliant XML sitemap for Search Console submission.
  • Schema Markup Generator — Fill forms to output JSON-LD for articles, FAQs, products, reviews, and more.
  • Open Graph Tag Generator — Generate Open Graph meta tags and preview social share cards for marketing QA.
  • Hreflang Tag Generator — Pair URLs with language and region codes to output correct hreflang clusters for multilingual SEO.
  • Redirect Type Checker — See whether a URL returns 301, 302, or other redirects plus timing for migration audits.
  • UTM Link Builder — Add UTM parameters for source, medium, campaign, and term to track campaigns in analytics.

Frequently asked questions

What is keyword density in SEO?
Keyword density usually means how often a target phrase appears relative to the total word count on a page. A common formula is: (number of occurrences × number of words in the phrase) ÷ total words × 100. It is a rough editorial signal—search engines today use broader relevance and quality signals, so never sacrifice readability to hit a density number.
How does this tool measure prominence?
We tokenize your paste the same way as for density, then find the first non-overlapping match of your phrase. We report the 1-based word position of that match, whether it falls within the first 100 words (a simple “early intro” check), and an “earlyness” percentage (how far into the document the first match starts). It does not read your live HTML title or H1—paste body copy or a full article to audit placement in context.
Why are my multi-word phrase matches zero?
Phrases must match consecutive tokens after trimming edge punctuation and (if enabled) folding case. Extra punctuation inside a word, different hyphenation, or a synonym will break the sequence. Try shorter phrases, disable “ignore case” if you intentionally use mixed case tokens, or normalize the text first with our find-and-replace or whitespace tools.
Is my content uploaded to a server?
No. Analysis runs entirely in your browser. Optional file upload uses the File API to read text locally; nothing is sent to our servers for keyword counting unless you use another tool on this site that explicitly performs network requests.
What keyword density should I aim for?
There is no universally safe percentage. Many SEOs treat very high repetition as a spam risk and focus on natural language, headings, and intent coverage instead. Use this tool to catch accidental stuffing and to verify your primary phrase appears early when appropriate—not to chase a fixed density score.
How is this different from the word frequency analyzer?
The word frequency tool ranks every distinct word in your text. This page is phrase-focused: you enter target keywords to see occurrences, density, and first-position prominence for those exact sequences. Use both together: frequency for vocabulary balance, keyword density for focus phrases.
Can I analyze several keywords at once?
Yes. Enter a primary phrase, then add more comma-separated phrases in the additional field. Each distinct phrase gets its own row in the results table. Duplicates (after trimming) are merged automatically.