Conservative matching
Rows match by handle plus option names and values. Duplicate identities are not matched. Changed options, new rows and auxiliary image rows stay visibly uncheckable.
Nestora ToolsNestora Tools · Free prototypeAll toolsNestora Tools · Shopify product CSV review
Change the price.
See what else changed.
Compare a baseline Shopify product CSV with your proposed update. Spot blanked fields, large price changes and edits outside your intended scope.
No store login. No file upload. No automatic edits.
Review your update
UTF-8 comma-separated CSV only. Up to 5 MiB, 10,000 data records, 200 columns and 500,000 cells per file. Current and selected legacy headers supported. Record numbers include the header; quoted multiline fields count as one record.
Choose two files or try the synthetic example.
Your review
Designed to stop and ask, not guess.
Read-only by design
No corrected CSV, live import, SKU guessing or automatic price repair. Your originals stay untouched. Reports may contain catalog details: store and share them carefully.
Prototype privacy
Catalog files are processed in your browser, not uploaded. No app analytics, cookies or persistent storage are used. Cloudflare serves this page and may process request metadata such as IP address. Files stay in memory until cleared or the tab closes. Downloaded reports stay on your device.
Not yet a paid product
This is a free evaluation prototype, not a paid service. No checkout, subscriptions or purchase promise is active. Branded support is not yet configured. Never send catalog files or passwords as feedback.
Another useful business tool
Prepare a draft estimate with services, quantities and prices. USD only, with tax entered by you. No account, upload or automatic sending.
Try the free Estimate BuilderNeed a website for your business?
Nestora Tools offers one-page business websites for $249 once. Custom tool development is separate and quoted for its scope.
See the website offer