Amazon Backend Search Terms Bytes Counter (249 Bytes Rule)
Count UTF-8 bytes and review a shorter version of your backend keywords.
Within the 249-byte reference limit
This tool counts every UTF-8 byte, including spaces and punctuation. The 249-byte limit is a conservative reference; Amazon’s rules can vary by marketplace and field. Check your Seller Central field before submitting.
How to check your Amazon backend keywords
Paste your search terms into the counter. The number updates as you type and turns red above 249 bytes. Select Shorten search terms to review a suggestion beside your original text. Check the suggestion before copying it into Seller Central.
Amazon Seller Central: Search TermsFrequently asked questions
What does the 249-byte limit mean?
This tool uses 249 UTF-8 bytes as a conservative reference, not a guarantee of Amazon acceptance. Limits and counting rules can differ by marketplace and field. Check the relevant Seller Central field before submitting.
Are bytes the same as characters?
Not always. For example, A uses one UTF-8 byte, 中 uses three, and 😀 uses four. This counter includes spaces and punctuation in the total.
What does shortening remove?
It removes punctuation, free, best, sale, repeated words and some simple English singular and plural duplicates. It cannot determine product meaning or guarantee a result under 249 bytes. Review the suggestion for lost attributes and check its count.