Free supplier price checker

Catch every supplier cost change before it eats your margin.

Add your supplier’s old and new price lists. CostLatch matches them by SKU and shows every cost that went up, went down, appeared or disappeared.

See it work with example dataNo signup. Or add your own two lists below.

Files never leave your browserExcel, CSV or copy and pasteUp to 5,000 products per list

Step 1 · Add your lists

Old list. New list. Same supplier.

Choose a file or paste straight from your spreadsheet. Nothing is uploaded, and reloading the page clears everything.

Old price list

Choose a file

Excel, OpenDocument, CSV or text, or drop it here.

Or paste from a spreadsheet or CSV

New price list

Choose a file

Excel, OpenDocument, CSV or text, or drop it here.

Or paste from a spreadsheet or CSV

Settings

CostLatch works these out from your lists; change them only if columns or prices look wrong.

CSV separator

Number format

Currency if a list shows none

Step 2 · Review

What changed

Rows that need a look come first, then price increases.

Show

Find SKU

Gross margin for sell prices

Sell price is the new cost ÷ (1 − margin), rounded up to the cent.

Scroll sideways to see every column.

SKU	Status	Old cost	New cost	Change	Sell price	Note

How it works

From a supplier update to a checked price list

Add both lists. Use files from the same supplier, or copy the tables straight out of Excel, Google Sheets or Numbers. Titles and notes above the table are fine.
Check the matched columns. CostLatch finds the SKU and cost columns itself and tells you which ones it picked. Change them if it guessed wrong, and add the pack and currency columns when your lists have them.
Look at flagged rows first. A duplicate SKU, a changed pack size or a price it can’t read is flagged for you to check, never guessed.
Download the report. Every SKU with its old and new cost, the change and a sell price at your margin, as Excel or CSV. CostLatch never changes your store or catalog.

Rather use formulas? Read the Excel guide to comparing supplier price lists.

Margin is not markup

At an $11 cost, a 30% markup sells for $14.30. A 30% gross margin needs $11 ÷ 0.70, which rounds up to $15.72.

Try the example lists

They include a price rise, a price drop, an unchanged item, a new item, a missing item, a changed pack size and a duplicate SKU. Use “Load example” above, or download them.

Old list CSV New list CSV

Fictional data, free to reuse. Don’t import it into a real catalog.

Pricing

Free

Compare up to 5,000 products per list and download the full report. No account or card needed.

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Which files work?

Excel (.xlsx), OpenDocument (.ods), CSV and tab-separated text, or a copy and paste from any spreadsheet. Older .xls and Numbers files need saving as .xlsx first. PDFs can’t be read.

My supplier sent one sheet with old and new prices

Add the same file on both sides. CostLatch picks the old price column for the old list and the new one for the new list; use Change columns if it picks wrong.

Does it match different suppliers?

No. It matches exact SKUs, so both lists need the same supplier’s codes. It doesn’t match by product name or convert currencies.

Where do my files go?

Nowhere. They’re read in this browser tab and cleared when you reload. Optional analytics counts visits and actions, never your files, SKUs or prices.

Can it change my store prices?

No. You get a report, and you decide what to change in your own system.