Listing Character & Byte Counter

An ecommerce listing character counter checks whether your product text fits a marketplace’s field limits before you publish. Titles, descriptions, bullet points and tags all have maximum lengths, and a listing that is too long can be truncated, rejected or ranked poorly.

You select a platform and a field, then type or paste your text. The tool compares your text against the built-in limit for that field and reports the result instantly, so you can edit copy with confidence instead of guessing how many characters you have used.

The tool measures your text in four ways. The character count is the text length: every letter, number, space, punctuation mark and ideograph counts as one. The byte count encodes the text as UTF-8: English letters and numbers use one byte, while Chinese, Japanese and Korean characters typically use three bytes each. It also counts words and lines.

Each field in the built-in table carries a character limit and, where the platform enforces one, a byte limit. Usage below 90% of a limit is marked green, between 90% and 100% amber as a warning, and anything over the limit red. The limits shown are the ones stored in this tool, not a live query of the platforms.

For an Amazon title, enter “Stainless Steel Water Bottle 32oz”. The tool counts 33 characters and 33 bytes — five words in one line — against Amazon’s 200-character title limit, leaving 167 characters.

For a byte example, the Chinese text “不锈钢保温杯” is 6 characters but 18 bytes in UTF-8 — three bytes per character — so its average is 3.0 bytes per character. That gap is why fields such as Amazon’s backend search terms must be checked in bytes as well as characters.