The comparison to make
Match the same SKU, then divide each pack price by the number of identical units in that pack. Comparing the two pack prices alone can hide a higher cost per unit.
A fictional example
SKU 002 used to cost $18 for 6 units: $3 per unit. The new pack costs $16 for 4 units: $4 per unit. The pack price fell by $2, but the unit price rose by one third, about 33.3%. These are example figures, not a supplier quote or a customer result.
Try the report before using your own files
Open the free Supplier Price-Change Checker and choose Try fictional example. Find SKU 002. The report marks both Increased and Pack changed. It also shows a duplicated SKU as Blocked, rather than choosing a record silently.
Prepare two CSV exports
Keep SKU values as text so leading zeros survive. Use columns for SKU, pack price and pack count; a currency column is optional when one shared currency applies. Export UTF-8 CSV or TSV. Select the delimiter and decimal convention, read the columns, then map the old and new lists separately. If there is no pack-count column, each price is treated as one unit.
Check the exceptions before changing an order
Use the same currency, tax basis, product specification and unit definition. A box of mixed items is not a pack of identical units. Resolve duplicate or invalid records first. Download the changes and exceptions CSVs and review them; this tool does not edit your source files or update a purchasing system.
When to keep the free edition
One supplier pair with up to 500 rows per file is free, including both CSV reports. A spreadsheet join and a unit-price formula may already cover your task. The optional $7 USD offline edition adds reusable supplier rules, up to 10,000 rows per input and batches of ten pairs. Buy only if those repeat-workflow features matter to you.
Privacy and limits
The checker processes files in the browser. Page requests reach the website host; checkout uses Payhip. There is no XLSX/PDF import, currency conversion, tax advice or fuzzy matching. The on-screen preview is limited; use the CSV for the complete report. Original AI-assisted software and guide by Value Addition. Product support: shruti4thewin@gmail.com.