BEFORE YOUR NEXT CATALOG UPDATE

Another supplier file.
What changed this time?

Compare two deliveries from the same supplier. Find changed prices, new variants and missing codes before updating your store.

Use my files

No account · Excel and CSV · files processed in your browser

See the differences

Prices, quantities and references matched by exact SKU.

Reuse your setup

Optionally remember your supplier’s columns in this browser.

Stay in control

Download a review report. This version does not modify Shopify.

01 / YOUR TWO FILES

One supplier. Two points in time.

Use complete files for the same catalog and stock location, with one row per variant and a unique, stable code. Partial update files cannot establish which SKUs are missing.

Previous file

Choose Excel or CSV

Up to 5 MB, 5,000 rows and 80 columns per file. First row: column names.

New file

Choose Excel or CSV

Up to 5 MB, 5,000 rows and 80 columns per file. First row: column names.

02 / REVIEW RULES

Currency of both pricesMust match in both files. Currency is not detected or converted automatically.Flag price changes greater than (%)Percentage of the previous price. A change from zero to a positive price is always flagged.

These are complete files from the same supplier, catalog and stock location. Each SKU identifies the same variant in both files; the price type and currency match.

Files and reports stay in this tab. Reloading or switching language clears them.

Ready for the next delivery

Setup name

Only column names, currency, threshold and your setup name are saved. No rows, prices, stock or files.

SHOPIFY

Reliable synchronization starts with reliable data.

This version helps you review files. A Shopify connection and scheduled updates are not available yet. An old stock file can restore units that have already sold: first establish which system maintains actual inventory.

How Shopify handles inventory CSV imports ↗

Before using the report

Does a missing SKU become zero stock?

No. Missing means the SKU did not appear in the new file. An empty value is not converted to zero either. Both need a source check.

Does it work with every supplier?

It supports complete XLSX or CSV tables with one row per variant and a unique SKU. It does not interpret PDF, XML, size columns or files with separate parent and child rows. We have no certified supplier integration.

What if Excel rounded a number?

For prices and stock we read the original cell number. Fractional units and prices with more than two decimal places are rejected, even when Excel displays a rounded value. Dates and percentages are not accepted as amounts.

Where does my data go?

This tool compares in your browser; it does not send rows to our server, Shopify or an AI API. Hosting receives normal page requests. Saving a setup is optional and applies only to this browser.

Comparison is free. The new-product converter is a separate flow with its own price and terms.