Image & Data
Update Shopify Inventory from a Supplier File
Cross the weekly stock sheet from your supplier with your store and download a safe inventory update — stop selling what your supplier ran out of.
Price & stock update
Drop your store export and the supplier's price list — everything runs on this device.
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Transparent methodology
What the result includes—and what it does not
Built for stores selling third-party inventory without an integration: the supplier mails a stock sheet, the store oversells until someone processes it.
Calculation method
- 1The supplier's stock column is matched to your variants by SKU or barcode with live match-rate feedback and normalization for messy keys.
- 2Out-of-stock policy is explicit: supplier zero can set stock to 0 or leave it unchanged; items missing from the supplier file are reported, never silently zeroed by default.
- 3Only variants that already track inventory in Shopify receive quantity updates; untracked variants are skipped and listed, and tracking settings are never modified.
Assumptions and limits
- Quantity via the product CSV applies to single-location stores — the option requires that explicit confirmation, and multi-location stores should use Shopify's inventory CSV instead.
- Discontinued references (in your store, absent from the supplier file) are reported for your decision; the file does not unpublish anything.
- Everything runs locally in your browser; stock sheets and costs are never uploaded.
Worked example
Monday's stock sheet, before the first oversell
Input: A 2,000-row supplier sheet against a 600-product store.
Output: 144 quantity updates, 12 items now out of stock, 9 discontinued references to review — one safe update file.
How to use it
Three steps. One clear answer.
- 1Enter or paste the values requested by the tool.
- 2Review the input units and choose any relevant options.
- 3Calculate, then copy or download the result you need.
Built for trust
Useful without the friction.
- No registration or paywall before your result.
- Responsive controls for phone, tablet, and desktop.
- Clear assumptions and warnings where estimates have limits.
Frequently asked questions
How does the Update Shopify Inventory from a Supplier File work?
The supplier's stock column is matched to your variants by SKU or barcode with live match-rate feedback and normalization for messy keys. Out-of-stock policy is explicit: supplier zero can set stock to 0 or leave it unchanged; items missing from the supplier file are reported, never silently zeroed by default. Only variants that already track inventory in Shopify receive quantity updates; untracked variants are skipped and listed, and tracking settings are never modified.
What should I check before using the result?
Quantity via the product CSV applies to single-location stores — the option requires that explicit confirmation, and multi-location stores should use Shopify's inventory CSV instead. Discontinued references (in your store, absent from the supplier file) are reported for your decision; the file does not unpublish anything. Everything runs locally in your browser; stock sheets and costs are never uploaded.
How current is this page?
The methodology and source notes were reviewed on 2026-07-25. Editable rates and inputs should still be checked against the provider or authority linked below.
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