Paste a competitor's product title, bullet points, or description below to extract unique keywords you can add to your backend terms.
Amazon gives sellers a hidden "Search Terms" field in Seller Central where you can add keywords that don't appear on your product listing but still help your product appear in search results. This field has a strict 250-byte limit โ and if you exceed it, Amazon ignores all your backend keywords entirely.
This free backend keyword optimizer helps you clean, deduplicate, and measure your keywords in real-time so you never waste a single byte. No signup or subscription needed. Everything runs in your browser โ your keywords are never sent to any server.
Amazon measures backend keywords in bytes, not characters. In UTF-8 encoding, standard English letters use 1 byte each, but accented characters like é or ü use 2 bytes, and CJK characters use 3 bytes. This means a 200-character string could actually be 300+ bytes if it contains special characters. Our tool shows you the exact byte count so you can optimize with confidence.
The most effective backend keyword strategy focuses on unique words not already in your title, common misspellings, synonyms, and related terms. Don't waste bytes on punctuation, repeated words, or brand names. Use this tool's auto-cleanup features to strip out everything Amazon ignores and pack the maximum number of relevant search terms into your 250 bytes.