Shopify Customers CSV Validator

You can, but free scripts and AI often miss edge cases that break real-world data: missing SKUs, currency formatting quirks, tax calculation errors, or date format mismatches. We have battle-tested validators specifically designed for accounting software imports that catch these issues before they corrupt your books. Plus, you get instant browser-based conversion without installing Python or managing dependencies.

Only the Email column is required (but values can be blank for guest customers). All other fields are optional.

These are read-only columns exported by Shopify but cannot be imported back. They show customer lifetime value.

You can preview Shopify Customers validation results for free — no signup needed. Full validation reports use credits based on row count.

Email is a required column header, but individual email values can be blank. Shopify will create customer accounts without emails, but the Email column itself cannot be missing.

Your CSV file must be in UTF-8 encoding. Replace smart/curly quotes with straight quotes and remove extra quotation marks before importing.

Customer CSV files must be under 15 MB. For larger exports, split your data into multiple files and upload them separately.

Customer CSV imports can take several hours to process. Shopify sends an email confirmation when the import completes or fails.

Shopify automatically skips creating accounts with duplicate emails, preventing duplicate customer records and keeping your database clean.

You can edit customer info like names, phone, and addresses, but Total Spent and Total Orders are read-only and reflect actual purchase data.

Only Email is required. Columns for first name, last name, phone, address, tags, and notes are optional and can be left blank.