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Ubify Core Engineering Team
SOFTWARE ENGINEERS & SYSTEMS ARCHITECTS
About This Tool
This fulfillment packaging tool renders standardized 4x6 inch thermal inbound carton labels on an HTML5 canvas for Amazon Fulfillment by Amazon (FBA) shipments. Amazon fulfillment centers require external cartons to carry clear shipment identifiers, box sequence indices (Box X of Y), weight annotations, and barcodes to ensure rapid scanning during dock receiving.
### Label Layout & Carrier Specifications The canvas renders an industry-standard 4x6 inch aspect ratio (288 × 432 points at 72 DPI, equivalent to 800 × 1200 pixels on 203 DPI thermal printers):
- **Inbound Header:** Top-level Amazon FBA identification banner. - **Shipment Identifier:** Displays the assigned FBA shipment ID (such as `FBA17V8K9XYZ`) assigned in Seller Central. - **Box Count Sequencing:** Formats the carton index as `BOX [N] OF [TOTAL]` to prevent receiving discrepancies. - **Fulfillment Center Address:** Standard recipient block (Amazon.com Services, Inc. - AVP1, Hazleton, PA). - **Carton Weight & SKU:** Displays box gross weight in pounds and the primary inventory SKU. - **Simulated Code 128 Barcode:** Renders alternating vertical barcode lines representing the internal carton identifier for warehouse conveyor laser scanners. - **Heavy Package Safety Alert:** Toggling the Team Lift setting renders a prominent safety warning banner for cartons weighing 50 pounds or more, meeting Amazon safety compliance guidelines.
### Concrete Generation Example Configuring carton 1 of a 6-box shipment: - **Shipment ID:** `FBA17V8K9XYZ` - **Box Sequence:** Box 1 of 6 - **Gross Weight:** 42 lbs - **Primary SKU:** `B09XYZ404-WIDGET-BLK` - **Team Lift:** Off (under 50 lbs threshold) Clicking the canvas renders a clean monochrome label ready for immediate PNG download or direct printing to thermal label stock (such as Zebra, Rollo, or Dymo 4XL).
### Client-Side Processing Note All label layout rendering and image generation execute strictly in client-side HTML5 Canvas code. No shipment IDs, seller metrics, product SKUs, or inventory numbers are transmitted to remote servers.
How to Use
- 1
Enter your assigned FBA Shipment ID from Amazon Seller Central.
- 2
Specify the current Box Number and Total Carton Count.
- 3
Enter the gross box weight in pounds and the inventory SKU.
- 4
Enable the Team Lift checkbox if the carton exceeds 50 lbs.
- 5
Download the generated 4x6 thermal label PNG for printing.
Frequently Asked Questions
What label size is required for Amazon FBA box labels?
Amazon requires 4x6 inch (102 × 152 mm) thermal shipping labels printed on non-reflective thermal sticker stock or laser paper.
When is a Team Lift warning required on an FBA carton?
Amazon fulfillment policy mandates that any carton weighing more than 50 lbs must display a clearly visible Team Lift safety warning label.
Are my FBA shipment IDs or SKU numbers saved on your server?
No. The label renders locally in your browser canvas with zero server transmission.