When creating an FBA shipment using Send to Amazon, Amazon splits your products into multiple shipments and generates separate box label PDFs for each shipment. While efficient for Amazon, this creates challenges during warehouse preparation - boxes of the same SKU are stored together but their labels are scattered across different PDFs.

With the Label Resizer Extension, you can trigger the SKU-Based Box Label Merge directly from Amazon Seller Central without downloading any files manually. The extension automatically:

Groups all box labels by SKU
Sorts them in the correct order
Resizes labels to the required format

Download either a single merged PDF with labels ordered by SKU or a ZIP file with separate PDFs per SKU. Supports both SPD and LTL shipments.

You can also use this feature via the web app - see Merge via Web for instructions.

Step by Step Guide

In Amazon Seller Central, navigate to the Send to Amazon workflow and reach the box label download step. The Label Resizer extension will appear on the page automatically. Click the SKU-Based Merge button in the extension panel.

Once processing starts, Label Resizer begins merging your files automatically.

If total boxes are less than 1,000, processing starts immediately and the file is automatically downloaded when complete.
If total boxes are more than 1,000, it runs as a background job. You can check the job status from the extension panel.

When the job is complete, click the download button to get your merged labels. Jobs remain available for 48 hours.

Important: During the SKU-Based Merge process for LTL shipments, Label Resizer clearly prints the Fulfillment Center Code on each label to prevent mixing boxes assigned to different fulfillment centers.