ONE EDIT. TWO FILES. A CLEARER CHECK.
Did your price increase
change anything else?
Compare an untouched, supported Shopify product CSV with its edited copy. Check every variant’s ordinary Price against your chosen increase and flag unexpected changes.
Free browser check. No checkout or store login needed. No catalog upload or import.
THE CHECKED RULE
Ordinary Price + your percentage.
Everything else unchanged.
Choose 0–100%, with up to two decimal places. Expected prices round to cents using HALF UP. Default: 7%.
Try it first with fictional files
Open the free checker and choose Try sample. It runs automatically; no download or file selection is needed. Choose Use my own files to clear the sample, select your two CSVs, and set Increase (%) to your intended increase before comparing. The sample leaves 0.50 selected.
To practice selecting files instead, download the fictional sample, extract it, select original.csv and edited.csv in the matching fields, set 0.50, and choose Compare files.
Expected result: Match, with the fictional price changing from 1.00 to 1.01 after HALF UP rounding. These are practice files only; do not import them into a store. A sample match does not establish that your own files are supported or safe to import.
Select two CSVs
Use your untouched original and the edited copy. Files stay on your device; the checker reads them in your browser.
Review the differences
Look for unexpected edits or cleared fields, unmatched variants and unsupported identities. Unsupported results need review, not a reassuring match.
Keep a local report
Save the text report for your own records, then clear the selected files. The checker never changes your source files.
A comparison, not an import guarantee
Match only means these supplied files follow the checked rule within the supported scope. It does not establish export authenticity, compare against your live store, predict an import outcome or make importing safe.
Supported scope: the reviewed current-native header format with URL handle, Title, Option1 name, Option1 value and Price. UTF-8, comma-separated; up to 2 MiB, 5,000 records and 100 columns per file. Unknown headers are unsupported.
No legacy-header conversion, linked options, unit-price calculations, decreases, repairs or selective price updates. Compare-at prices, market prices, costs and other supported fields must remain unchanged. Variant identity uses handle and option names/values, not SKU alone.
Read the complete quick guide / Download the standalone HTMLBefore you start
Is this the right check for my edit?
Use it when every variant’s ordinary Price should increase by the same percentage, with all other supported fields unchanged. You need the untouched original CSV and your edited copy. Read the supported headers and limits above first; legacy exports and selective price changes are not supported.
Do I have to pay or use Gumroad?
No. The browser checker is free and needs no checkout. The optional Gumroad download has a $0 minimum; you can enter $0 or choose a voluntary payment. Paying is optional and does not add features or an import guarantee.
Prefer a direct download? Get the HTML and guide here. Extract the ZIP before opening the HTML. Local file opening and cross-browser compatibility are not fully verified.
Where do my files go?
The checker reads selected CSVs on your device and never changes them. This page has no analytics, upload form or store connection. Gumroad is a separate service with its own checkout and privacy practices; do not send your CSVs there.
Does “Match” mean I can safely import?
No. It only describes these supplied files within the supported comparison rule. The checker does not connect to your live store, repair files or predict Shopify’s import result.
What if I get stuck?
Email pricechangechecksupport@gmail.com with the stage where you got stuck and a general description. Do not attach CSVs, reports, screenshots, prices, credentials or customer information. No response time is promised.
A small trial, with a specific question
Can this help merchants already planning supported native price edits compare their files without extra help? The free beta is public. The planned usability study is limited to five merchants over seven days. Merchant usefulness and demand are not yet established.
For general questions, use the support email above. Do not send catalog files, screenshots, store credentials or report contents. Using the checker does not enroll you in a study. This page has no analytics or checkout; the optional Gumroad link opens a separate service.