Shopify Product Metafield CSV Preparer

Nothing uploadedTested up to 200 MB

Map product attributes to Shopify metafield columns, validate namespace/key and values locally, then download a Shopify-ready CSV.

Prepare one Shopify product CSV locally in your browser, without uploading catalog data, up to 200 MB. Keep or rename ordinary product columns, map selected source columns to product.metafields.[namespace].[key], choose the Shopify metafield type already defined in your store, and validate the complete file before export. The preflight checks Shopify-documented namespace/key syntax, supported product CSV metafield types, value formats, size limits, list limits, and the Title plus URL handle columns needed for product updates. Store-specific definition rules such as custom choices or regex constraints still need to be checked in Shopify.

Processed locally in your browser

Shopify product metafield CSV preflight

Map and validate one product CSV up to 200 MiB locally before downloading a Shopify-ready file.

Add your product CSV

Start with a Shopify export or another catalog CSV that contains the product columns and attributes you want to import.

Upload product CSV

One CSV up to 200 MiB. Comma, semicolon, tab, and pipe delimiters are detected automatically.

Download example CSVProcessing stays in this browser. Product and metafield values are not uploaded to Nablyx.

Metafield definitions come first

Shopify must already have each product metafield definition. This CSV does not create definitions and cannot know store-specific validation rules such as custom choices, min/max values, or regex constraints.

Prepare product metafields before importing a Shopify CSV

1
Choose a product CSV from your device.
2
Keep or rename the ordinary Shopify product columns you need.
3
Mark attribute columns as metafields, enter namespace.key, and choose the matching existing Shopify metafield type.
4
Run the local preflight and fix identifier, value, size, list, or required product-column errors.
5
Download the Shopify-ready CSV with canonical product.metafields namespace/key headers.

Built for the real task

Shopify metafield namespace/key mapping
Type-aware value and list validation
Streaming CSV mapper export
Browser-local processing

See the transformation

Awkward source headers become import-ready columns.

Rename the columns you need while keeping every value under the correct header.

cust_idcustomer_id

given_namefirst_name

mailemail

✓ Values stay with the right column

Browser limits

Files are limited to 200 MB to protect browser stability, especially on phones. Processing stays on this device.

Shopify metafield namespace/key mapping

Map product attributes to Shopify metafield columns, validate namespace/key and values locally, then download a Shopify-ready CSV.

Private by design

The selected file is not uploaded to Nablyx.

Processed locally in your browser

No. This tool reads and transforms the file locally in your browser.

Common uses

Shopify metafield namespace/key mapping
Type-aware value and list validation
Streaming CSV mapper export
Browser-local processing

Does this tool create Shopify metafield definitions?

No. Create the product metafield definition in Shopify first, then choose that same type here. This tool prepares and validates the CSV locally; it does not connect to your store or create definitions.

How to import product metafields with a Shopify CSV

Shopify metafield CSV format and namespace/key rules

Fix common Shopify product metafield CSV import errors