Your Amazon flat file upload failed. Get line-by-line fixes in minutes.

Paste your processing report. We tell you exactly which row, which column, and what to change — for error 8016, 8541, 8542, and 200+ more. No VA, no 48-hour turnaround, no guesswork.

Get early access — your first fix is free

We're onboarding sellers now. Drop your email and we'll send you a link to upload your processing report.

No spam. One email when your spot opens.
🔒 Your files are processed and deleted — never stored, never used for training. We never ask for Seller Central access.

How it works

1

Upload your report

Drop in the processing report from Seller Central (or the flat file itself). Any category, any marketplace.

2

Get row-level fixes

Every error decoded in plain English: which SKU, which column, what value Amazon expects — checked against your category's Valid Values.

3

Re-upload and pass

Apply the fixes (or download the corrected file), upload to Seller Central yourself. You stay in control of your account.

Errors we handle

8016
Not enough data to create variation relationship
 8541
Product ID conflicts with existing ASIN data
 8542
Product ID matches multiple ASINs
 8560
Missing required attribute
 90122
HTML tags in product fields
 More
Broken parent-child, orphaned parents, theme mismatches

Simple pricing. No subscription.

Diagnosis

Free
always
  • Full error list decoded
  • Which rows are affected
  • Severity and root cause

Full fix

$12
per file · pay when it passes
  • Exact value for every broken cell
  • Corrected flat file download
  • Re-check until Amazon accepts it

Questions sellers ask

Do you need access to my Seller Central account?

No. FlatFileFix works entirely on files: you upload the processing report or flat file, we return fixes. You upload the corrected file to Amazon yourself. We never see your credentials, sales data, or anything else.

What happens to my files?

Files are processed in memory, results are generated, and uploads are deleted. We don't store your catalog data and we never use it for training anything.

Which categories and marketplaces do you support?

All categories that use inventory flat files, on Amazon US, UK, EU, and other marketplaces. Category templates differ — we validate against the Valid Values of your specific template version.

How is this different from hiring someone on Fiverr?

Freelancers charge $20–100 per file and take 24–72 hours. FlatFileFix costs $12, takes minutes, and you don't have to hand your catalog to a stranger. If a file is genuinely beyond automated repair, we tell you upfront instead of charging you.

Amazon deprecated flat file feeds — is this still relevant?

Amazon retired flat file submissions through the API in July 2025. Manual flat file uploads in Seller Central ("Add Products via Upload") are alive and remain the main way sellers do bulk edits and variation fixes.