What is the Amazon Listing Keyword Density Checker?

Unlike a standard keyword density tool, this checker analyzes your Amazon listing as Amazon's A9 algorithm sees it — across all three indexed sections separately: title, bullet points, and description. Each section carries different weight in Amazon's ranking algorithm, and a keyword that appears in all three sections signals stronger relevance than one that appears in only one.

Enter your target keywords (the phrases you want to rank for) and the tool shows you exactly which sections each keyword appears in, how often, and which keywords are completely missing from your listing. This makes it fast to spot gaps — keywords you're targeting but haven't actually included — and over-optimizations where you've repeated a phrase too many times in a single section at the expense of readability.

Key Features

  • Section-by-section analysis — shows which listing sections each keyword covers
  • Target keyword gap detection — instantly flags keywords you're missing entirely
  • Coverage score — percentage of your target keywords present across the listing
  • Full frequency table — top keywords ranked by total occurrence with density percentages
  • Color-coded density — green (optimal), yellow (borderline), red (over-optimized)

Amazon Keyword Placement Priority

  1. Title — highest ranking weight; put your primary keyword first
  2. Bullet Points — secondary keywords; all 5 bullets are indexed
  3. Description — additional keywords; also indexed by A9
  4. Backend Search Terms — not visible but fully indexed (not checked here — use Seller Central)

A keyword only needs to appear once across all sections to be indexed. Focus on coverage first, then use remaining space for natural, conversion-focused copy.

Why Use tools999.com?

100% free, no account required. Your listing content is never stored or shared. Built for FBA sellers who want to optimize listings without expensive software.

Frequently Asked Questions

Amazon's A9 algorithm uses keyword presence across your title, bullets, description, and backend search terms to determine relevance. Repeating keywords across different listing sections reinforces relevance signals. However, stuffing the same keyword repeatedly in one section hurts readability and conversion.

Priority order: (1) Title — highest weight, put primary keyword first, (2) Bullet points — secondary keywords, fully indexed, (3) Description — additional keywords, also indexed, (4) Backend search terms — up to 250 bytes, not visible but fully indexed. A keyword only needs to appear once to be indexed — repetition in the same section doesn't multiply its ranking weight.

Keyword stuffing means unnaturally repeating keywords until the listing reads as spam. While Amazon doesn't explicitly penalize like Google, stuffing hurts conversion because it makes listings unreadable. Poor conversion signals to Amazon's algorithm that your listing isn't relevant, which lowers your ranking.

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