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# Barcode Field

# How to Map Barcode Field

Assign barcodes (such as UPC, EAN, or ISBN) to your product variants on Shopify using existing feed columns or a single default fixed value. This ensures accurate product identification across your store inventory and connected sales channels.

|| Available on: ✔️ Add | ✔️ Update | ✔️ Export

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## Watch the Barcode Field Walkthrough

Learn how to map product barcodes or set a default fixed barcode value across your product catalog.

${youtube}[Barcode Field Walkthrough](rroalICS7Q8)

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## How to Set Up Barcode Mapping

Go to **App** → **Feed Settings** → **Step 2: Field Mapping**

![](https://storage.crisp.chat/users/helpdesk/website/b219050a5836c000/139b711b-2423-45a2-801f-39b202_1905q0.jpg)

1. **Map Field**: Select the **Barcode** field in Stock Sync.
2. **Choose Source**: Select your feed file's barcode column header, column index, or switch to a fixed value.
3. **Save Settings**: Save your mapping to apply barcodes during your next feed sync.

| If your feed file does not contain a barcode column, you can use a fixed value (e.g., `69076746472`) to apply the same barcode to all synced products.

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## Barcode Field Smart Settings / Detailed Breakdown

### 1. Dynamic Column Mapping
Map the barcode field directly to the corresponding column header name or index in your feed file to import unique barcodes for each variant.

| Ensure your feed contains valid standard barcode formats such as UPC, EAN, JAN, or ISBN.

### 2. Fixed Barcode Value
If your feed file does not have a dedicated barcode column, enter a static fixed value that applies uniformly across all mapped items.

| Example: Setting a fixed value of `69076746472` assigns this exact barcode string to every product variant in the feed.

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## Key Rules & Technical Details

- **Supported Formats**: Accepts standard numeric and alphanumeric barcode formats including UPC, EAN, ISBN, and GTIN.
- **Fixed Value Override**: When set to a fixed value, every variant processed by the feed receive the exact specified barcode value.

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## Troubleshooting Steps

* **Issue**: Barcodes are not updating on Shopify → **Solution**: Confirm that the correct column name or index is selected in **Step 2: Field Mapping**, or verify that your fixed value is saved.
* **Issue**: Barcode update fails due to invalid characters → **Solution**: Remove special characters, spaces, or symbols from your feed file or fixed value field.

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## Good Articles to Continue

* \[[Field Mapping Overview](https://help.stock-sync.com/en/category/matching-column-hc3vlq/)] → Master field mapping options, column headers, and column indexes.
* \[[Fixed Value Mapping Guide](https://help.stock-sync.com/en/article/how-to-set-fixed-value-ccjtgf/)] → Learn how to apply static fallback values across mapped fields.