Developer Builds Free Browser Tool to Validate Shopify CSV Files Before Import

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A developer has released CSVPreflight, a browser-based tool designed to catch errors in Shopify product CSV files before they are uploaded. The tool runs 19 validation checks locally in the browser, meaning no data is sent to external servers. Each detected error is reported with its exact row number, column name, and a plain-English explanation, addressing Shopify's notoriously vague import error messages. Core validation is free, while an auto-fix feature that corrects handles, booleans, URLs, and whitespace is available under a Pro plan at $5 per month. The tool is built with pure HTML, CSS, and JavaScript, with no client-side dependencies, allowing it to process files with over 10,000 rows in milliseconds.

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