EStore Tools

Amazon Backend Keywords Checker

Check backend search terms against Amazon's byte limit, strip repeats and wasted words, and get a cleaned version.

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Bytes used
169 / 249
Words
31
Unique words
17
Bytes in cleaned version
90
  • Within 249 bytes80 bytes to spare.
  • 2 repeated wordsyoga, mat. Repeating a word adds nothing to indexing.
  • Filler wordsfor. Amazon ignores these.
  • Subjective or temporary wordsbest. Amazon's guidelines say to leave these out.
  • Punctuation between termsSeparate terms with spaces. Commas and semicolons aren't needed.

Cleaned search terms

yoga mat non slip thick exercise women pilates workout gym fitness eco friendly tpe travel

Lowercase, one space between words, no repeats, filler, subjective words.

Bytes, not characters

Amazon limits the Search Terms field to fewer than 250 bytes in most marketplaces. Plain English letters take one byte each, but accented letters take two and symbols like € take three, so a keyword list with foreign terms can go over while the character count looks fine.

This checker counts every byte, spaces included. That's the safe reading of the limit: some sellers say spaces aren't counted, but staying under 249 with everything counted can't go wrong.

What to leave out

  • Words already in your title and bullets. They're indexed already, so repeating them wastes bytes.
  • Repeats. One mention is enough; repeating a word doesn't boost it.
  • Filler words such as “and”, “for”, “the”.
  • Brand names and ASINs, yours or anyone else's.
  • Subjective and temporary claims such as “best”, “cheap”, “new” or “sale”.
  • Punctuation. Separate terms with a single space.

Spend the space on synonyms, alternative names, uses and audiences shoppers actually search for.

Updating your search terms

  1. 01

    Open the listing

    In Seller Central go to Catalog → Manage all inventory, find the product and choose Edit.

  2. 02

    Find Search Terms

    On the listing's Keywords section, paste the cleaned version into Search Terms.

  3. 03

    Save and check

    Changes can take a day or two to index. Search for a term that only appears in the backend field to confirm.

Questions people ask

What happens if I go over the limit?

Sellers report that Amazon can ignore the whole field when it's over the limit, not just the extra words. That's why the checker flags any overage.

Should I use commas between keywords?

No. Spaces are enough, and punctuation only uses up bytes.

Do I need plurals or misspellings?

Amazon's search handles many plurals and common misspellings already. Spend bytes on genuine synonyms first.

Does the order of words matter?

Less than in the title. Put your most important terms first so they survive if you ever need to trim.

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Want this builtinto your store?

I'm Emmanuel, a Shopify and WooCommerce developer. If this tool pointed at something you'd rather have fixed for you (a faster store, cleaner product data, a migration, a custom feature), send me a note.

Emmanuel Asika

Emmanuel Asika

Shopify & WooCommerce developer, Dublin

I build and fix online stores: new builds, migrations, speed, SEO and the custom bits apps can't do.

hello@emmanuelasika.com
See my work

Last reviewed 29 September 2026.