Amazon doesn't tell you which ASIN or which field caused the rejection. One bullet point 1 character over the limit stops updates to hundreds of listings. The Bullet Point Validator finds every violation in seconds — with the exact field and character count for each.
The bullet point character limit is only one of the technical reasons flat file uploads fail — but it's the most common and the hardest to locate manually.
Amazon validates bullet fields across all ASINs before processing. If even one bullet point across thousands of rows exceeds the limit, Amazon rejects or partially processes the entire upload.
The error message Amazon returns typically says something like "invalid value" or "content policy" — without specifying which ASIN, which bullet field, or what the actual violation was.
The bullet point limit is 500 characters — not bytes. But depending on how your text editor counts characters, the number shown may differ from what Amazon actually processes. The validator counts consistently.
Bullet points frequently start as longer product description text that gets copied in. A 600-character paragraph trimmed to a bullet often still exceeds 500 characters without anyone checking the final count.
Amazon's flat file contains five bullet point columns per ASIN. The validator checks all five for every single row in your file in one pass.
For a catalog with 200 ASINs, that's 1,000 individual bullet fields checked — in under a second. Every violation is reported with the exact ASIN, exact field, current character count, and how many characters over the limit.
The scale of the problem becomes clear when you look at what manual checking actually requires.
From rejected upload to clean re-submission — the fastest path.
Drag and drop your Amazon Seller Central flat file (.csv or .txt) into the tool. It runs entirely in your browser — no upload to any server. Every bullet field in every row is checked simultaneously. Results appear in under a second.
Download the errors-only export showing every violation — ASIN, bullet field number, current character count, and how many characters over the limit. This becomes your fix list. Share it with your VA or copywriter for targeted edits only on the offending fields.
Edit only the flagged bullet fields in your flat file. Run the validator again to confirm zero violations. Re-upload to Seller Central. The file processes cleanly — no more rejection for bullet point violations.
LEN() formula to each of the 5 bullet columns, filter for values over 500, and cross-reference back to the ASIN — across potentially thousands of rows. Any formula error means you miss a violation. The Bullet Point Validator does this consistently across all 5 fields and all ASINs simultaneously, in under a second, with a clean exportable output that requires no formula building.Upload your flat file. Get every violation — ASIN, field, character count, and overage — in under a second. Export and fix before Amazon rejects it again.
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