Amazon's Algorithm Reads Bytes, Not Marketing Copy
One umlaut over the limit and Amazon silently ignores ALL your keywords. We pack to exactly 249 bytes. Every time.
Overview
What it does
Amazon's backend keyword field has a 250-byte limit. Not 250 characters — 250 bytes. An umlaut is 2 bytes. One byte over and Amazon silently ignores the entire field. The product becomes invisible to search. No human can reliably do this.
Under the hood
How it works
The Amazon adapter calculates exact byte sizes for UTF-8 encoded text, strips Amazon stop words, prioritizes high-value keywords by search volume, and packs to exactly 249 bytes. It also generates brand-model-type titles, benefit-first bullet points, and maps item specifics to Amazon's category taxonomy.
In Practice
Real example
Before: 267 bytes → keywords silently ignored, product invisible for 6 months. After Central: 249 bytes → perfect keyword density, all terms indexed, visibility restored within 48 hours.
See Amazon 250-Byte Optimizer in action
Book a demo and we’ll show you how this feature transforms your product data.