Know what changed before your next Shopify import.
Compare supplier catalogs, catch price and stock changes, clean CSV/XLSX data, and prepare safer Shopify imports locally. Reuse mappings, review every export, and pay once—without API keys or subscriptions.
Secure checkout by Gumroad, our Merchant of Record. Your download link arrives by email.
Please read the limitations before buying
Supplier spreadsheets change, but the consequences are easy to miss. A higher cost can squeeze your margin. A missing product can create uncertainty. Different column names can turn a routine catalog update into a long session of copying, checking, and reformatting. SuperDigi CSV ChangeGuard helps you understand those changes before you prepare your next Shopify import.
Built for store owners, catalog managers, and freelancers, ChangeGuard runs locally in your desktop browser. Download the ZIP, extract it, and open the application. There is no application account, API key, local server, or customer programming environment to configure. Core processing works offline, and the application does not upload your supplier spreadsheets to a service.
Start with a CSV or ordinary XLSX workbook. Preview the rows, choose the worksheet when needed, and map supplier headings into consistent fields. Automatic suggestions give you a starting point; you decide which mappings to apply. Save a supplier profile for future files, including its decimal convention and pricing configuration, and export a JSON backup to keep that setup portable.
🔍 Review your data with clear row-level findings. Catch missing titles, duplicate SKUs, invalid prices, conflicting variant combinations, and other supported checks. Preview available corrections before applying them, generate missing product handles, and undo supported catalog edits. Product and variant identities are handled separately, while identifiers are preserved rather than silently reformatted.
Load a previous supplier catalog to see what changed. Review new, missing, changed, unchanged, and conflicting records, with price, cost, and stock differences where available. Editable thresholds highlight changes worth investigating. A product missing from the latest supplier file is marked for review; it never becomes an automatic deletion or archive instruction.
💰 Turn supplier costs into proposed retail prices using markup, target gross margin, or fixed profit, with minimum-price and rounding options. Markup and margin use different calculations: a cost of $20 becomes $30 with 50% markup, or $40 at a 50% target gross margin. Preview recalculated prices before committing them.
When you are ready to prepare a Shopify file, new products default to draft and unpublished. Inventory quantities stay excluded unless you explicitly select the single-location workflow. Existing-product exports are deliberately limited to price and cost updates, using a separate current Shopify export, confirmed handles, exact options, and the complete unchanged variant set. Review the exact output columns and records before downloading.
ChangeGuard also produces CSV, JSON, and print-friendly HTML change reports for internal reviews or client handoffs. Supplier profiles persist locally; raw catalog sessions do not survive a reload, so keep your source files and back up your profiles.
🎁 Your one-time purchase includes the application, three PDF guides with HTML equivalents, fictional practice datasets, and the supplied commercial-use license. Use it for your own business or client catalog work. Back up your Shopify catalog and test a small import first: ChangeGuard prepares files for your review and does not connect to your store or guarantee acceptance of every catalog.
Extract the ZIP, open the local application, and optionally select Try Demo Data. Import the latest CSV or XLSX with the New supplier role, choosing encoding, delimiter, worksheet, or header row when needed.
Review the preview, map columns, select the decimal convention, and use a consistent supplier scope. Save a profile if useful.
Review findings. Correct source data or preview the supported text, handle, and pricing edits; reimport identity changes.
Optionally load and separately map the previous supplier file using the same scope, then see what changed.
Investigate changes and conflicts, then choose report-only, new-product CSV, or a price and cost update with a separate current Shopify snapshot.
Review the exact output, resolve blockers, confirm the workflow, and download. Back up Shopify and test a small manual import.
01_Application/index.html in your desktop browser.02_Documentation/Quick_Start_Guide.pdf and select Try Demo Data.After checkout, Gumroad emails your receipt with a link to your download: one ZIP of about 7.1 MB.
One purchase for one person or business, including internal commercial use and client catalog-management work. Generated outputs may be shared. Application redistribution, resale, giveaway, or sharing is prohibited without written permission. No remote activation/account/license server. Third-party licenses retain their own rights. Not independently legally reviewed.
It maps and validates supplier spreadsheets, compares old/new supplier catalogs, calculates proposed prices, and prepares reviewable Shopify CSV files and reports. You perform the actual Shopify import yourself.
Yes. After downloading and extracting the package, core processing works offline. Opening the packaged HTML through file:// with an offline browser context passed automated Firefox/Linux checks. Purchasing and downloading through Gumroad still require internet access.
CSV and ordinary XLSX workbooks. CSV supports comma, semicolon, and tab delimiters, quoted fields, and selectable UTF-8, Windows-1252, or UTF-16 LE decoding. XLSX supports worksheet selection within a restricted workbook subset.
No. XLSX formulas and cached formula results are ignored with warnings. Date-formatted numeric cells retain serial values with warnings. Encrypted/ZIP64 workbooks and some unusual workbook structures are unsupported. Replace formulas with verified literal values before importing.
It generates a CSV for supported new-product fields. Exports default to draft and unpublished, require explicit prices and handles, and exclude inventory unless you opt into the single-location workflow. The developer reports four successful draft-product imports in a development store.
Version 1.0.0 supports price and cost updates only. You need a current Shopify export, explicitly mapped existing handles, exact option identities, and the complete unchanged variant set for each targeted product. SKU alone is insufficient. The developer reports a successful price-only update preserving other information.
No. It has no Shopify API connection. You download the prepared CSV, review it, and import it through Shopify yourself. Review Shopify’s publishing and overwrite settings, back up your catalog, and test a small batch.
No guarantee is made. The supported schema subset was checked against official documentation on November 7, 2026. Local validation, automated fixtures, and developer-reported example imports do not cover every store configuration or supplier format.
No recurring app subscription, remote activation, license key, or application registration is required. ChangeGuard is a one-time purchase. Gumroad checkout and delivery are separate from offline application use.
Extract the entire downloaded ZIP, open 01_Application, and open index.html in a supported desktop browser. No Node.js, Python, database, terminal, browser extension, or local web server is required for customers.
Automated evidence covers Firefox 157.0 on Linux. The developer reports successful Windows/macOS and Chrome/Edge checks; exact versions and platform/browser combinations were not supplied. Safari and mobile browsers are not claimed as supported.
The application processes files locally and contains no upload, telemetry, analytics, or remote API workflow. The packaged Firefox acceptance run observed zero HTTP(S) requests. Supplier profiles are saved in browser storage; raw catalogs stay in session memory. Local storage is not encrypted.
It uses exact supplier-scoped immutable variant IDs, otherwise SKUs, otherwise explicitly mapped handles with option names/values. Titles alone never establish matches. Duplicate or unresolved identities require review. Use the same supplier scope for old and new versions.
No. It is marked Missing from Latest Supplier File — Review Required. Supplier absence does not establish discontinuation or live store state, and the application does not generate automatic deletion/archive instructions.
Yes. Save separate supplier profiles and export JSON backups. Profiles include mappings, decimal convention, and pricing configuration. The comparison workspace handles one old/new catalog pair at a time; it is not a centralized supplier database or automatic synchronization service.
Input is limited to 15 MiB, 50,000 data rows, and 200 columns. Shopify CSV output is limited to 15,000,000 bytes. The engine was benchmarked at 50,000 rows, but equivalent browser responsiveness/memory is unverified. Large files may pause the interface; start with a small sample.
No. Optional product-CSV inventory quantities are restricted to an explicitly confirmed single-location case. Existing-product updates cover price/cost only. Use Shopify’s appropriate inventory workflow for multi-location stock; generic product-field and variant-identity updates are outside v1.0.0.
Raw catalogs, comparisons, and unsaved edits do not persist after reload. Supplier profiles persist in the tested browser setup, but clearing storage or moving the file can affect access. Keep source files and export profile JSON backups.
Yes. One purchase licenses one person or business, including employees/contractors acting for that business, for internal use and client catalog-management work. You may share generated CSVs/reports, but not redistribute, resell, give away, or share the application package. The license is not independently legally reviewed.
Gumroad handles checkout and ZIP delivery. Extract the ZIP, read the Quick Start, and select Try Demo Data. Contact support@superdigi.app for help.
Questions about this product? Email support@superdigi.app
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