Amazon Backend Keyword Byte Counter
Count your Amazon backend search terms in bytes, not characters — and clean them up: no punctuation, no repeated words, nothing already in your title.
Your input
Words already in the title are removed — Amazon indexes them anyway
Amazon US: under 250 bytes (249 max)
Result
Cleaned search terms
49 / 249 bytes
200 bytes left · original was 86 bytes
Paste this into Search Terms
insulated for gym flask leakproof bpa free sports
Removed (repeated or in title): water, bottle, steel
Download your results
Branded KleverKlimb report with your inputs and results.
What it checks
Exactly what this tool does — everything runs in your browser and nothing is uploaded.
Bytes, not characters
Amazon counts UTF-8 bytes. Plain letters are 1 byte, but accented letters (é, ñ) take 2 and some symbols take 3 — so a field can look short yet be over the limit.
Cleanup
Lowercases, removes commas and other punctuation, collapses spaces and drops repeated words — none of these help indexing.
No title repeats
Words already in your title are indexed from the title, so repeating them in backend terms just wastes bytes.
Amazon Backend Search Terms: The 250-Byte Rule and How to Use It
4-minute guide · How Amazon backend search terms work, why the limit is in bytes not characters, and what to include or leave out — with a cleanup example.