Blank vs. missing columns
Understand why an empty Vendor cell deserves a different review from an absent Vendor column.
Read the overwrite guide →Shopify catalog change review
Know what changes.
Before you import.
Compare your current product export with a proposed update. Find blank values, changed prices, and variant risks in one review.
● Files stay in your browser
Review a catalog updateFree · No account needed
01 / BASELINE
A fresh CSV exported from your Shopify store.
02 / UPDATE
The CSV you are planning to import.
01 / Compare the actual files
Matches exact handles and option values, including common legacy Shopify column names.
02 / Review with context
Separates omitted columns, included blanks, and unmatched variants. No automatic catalog edits.
03 / Keep the evidence
Download a review report to discuss with your team before making changes in Shopify.
A more deliberate import
Small mistakes. Store-wide consequences.
An included blank and an omitted column can have different effects. A changed option value can replace a variant identity. Review the change, keep your original export, then test a small import.
Variant changes and handoff
Learn how to check options and document a catalog update before a client approves it.
Read the variant review guide →Tools for your workflow
Start with a free review.
Browser Review
$0 always free for this version
Two-file comparison, risk notes, CSV and JSON reports. Your files stay in your browser.
Compare your catalogs ↑Agency Review Kit
$29 USD · one-time
Offline command-line reviews, repeatable batch runs, sample files, and a client approval checklist. Requires Node.js 22 or later.
Version 1 toolkit. No subscription or promise of lifetime updates. Sold through Gumroad; local currency and applicable tax are shown at checkout.
See exactly what is included →A few useful answers
Does Elyxu connect to my store?
No. Files are processed in browser memory. Nothing is imported, changed, or sent to Shopify.
Can this guarantee an import is safe?
No. It is a file comparison, not a Shopify import simulator. Store state, apps, inventory locations, metafield validity, image reachability, and every import rule are outside its scope. Image continuation rows are flagged but not compared as variants.
Why is a missing product only a note?
Leaving a product out of an update file does not mean Shopify will delete it. An incomplete baseline can also make an existing item look new.
What should I do with the report?
Resolve ambiguous rows, confirm intended blanks, keep your backup, and test a small import. The downloaded CSV is a review report, not a product import file.