Bulk Shipping Labels & Logistics Documents
Warehouses and fulfillment centers process hundreds to thousands of shipments daily, each requiring accurate labels, packing slips, and delivery confirmations. Mergram generates all these documents in bulk from your shipment data, complete with scannable barcodes, tracking numbers, and delivery addresses.
The Challenge
Logistics operations live and die by label accuracy. A shipping label with the wrong address means a returned package, a redelivery charge, and an unhappy customer. A packing slip with incorrect quantities means the warehouse sends the wrong items, triggering returns, refunds, and negative reviews. At scale — a fulfillment center processing 5,000 orders per day — even a 1% error rate translates to 50 mislabeled packages daily.
The manual label creation process is a significant bottleneck for growing operations. Many warehouses still rely on their shipping platform’s built-in label generator, which produces functional but unbranded labels. When operations need custom labels — with company branding, return instructions, promotional inserts, or multi-language shipping information — the built-in tools fall short. Teams resort to manually creating labels in Word or design software, a process that simply cannot keep pace with order volume.
Barcode generation adds another layer of complexity. Standard shipping labels need barcodes for the tracking number, but warehouses also need internal barcodes for order IDs, SKU numbers, and bin locations. Generating these programmatically requires specialized software or custom scripting, both of which add cost and maintenance burden.
During peak seasons — holiday shopping, flash sales, subscription box renewal periods — shipping volumes can spike 3 to 10 times above baseline. Operations teams must scale their label printing capacity overnight, often by adding temporary staff who are more prone to errors precisely when accuracy matters most.
The Solution
Mergram provides a simple, scalable approach to logistics document generation. Upload your label or packing slip template as a PDF, connect your shipment data spreadsheet, and generate every document in a single batch. Include barcodes (Code 128) for warehouse scanning, QR codes for tracking URLs, and all the shipping details your operation requires — merged automatically from your data.
Tip
Use the REST API to trigger label generation automatically when orders are ready to ship. Combined with Zapier or Make.com, you can build a fully automated pipeline: order ready in your WMS triggers label generation in Mergram, and the PDF is sent directly to your label printer.
Document Types
| Document | Key Merge Fields | Typical Use |
|---|---|---|
| Shipping labels | Recipient address, sender address, tracking number, weight, barcode | Outbound shipments |
| Packing slips | Order ID, item list, quantities, SKU, warehouse location | Fulfillment verification |
| Delivery confirmations | Recipient name, address, delivery date, signature line | Proof of delivery |
| Return labels | Return address, RMA number, barcode, return reason | Customer returns |
| Bill of lading | Shipper, consignee, freight class, weight, hazmat codes | Freight shipments |
| Warehouse bin labels | Bin ID, zone, SKU range, barcode | Put-away and picking |
Step-by-Step Workflow
- Export shipment data from your WMS, shipping platform, or order management system. ShipStation, Shippo, EasyShip, and most platforms support CSV or Excel exports. Include columns for recipient name, address, tracking number, order ID, and item details.
- Design your label or packing slip template — use your existing label layout or create a custom design with your company branding. Export as PDF.
- Upload the template to Mergram and open the visual canvas editor.
- Place field mappings — drag text fields for addresses, order IDs, and item details. Add a barcode field mapped to your tracking number or order ID column. Optionally add a QR code field for tracking URLs.
- Preview a sample label to verify barcode readability, address placement, and overall formatting.
- Generate all labels in one batch. Download as a ZIP for batch printing, or integrate with your label printer via the API.
Info
For international shipments, create a separate customs declaration template that includes HS tariff codes, declared values, and country of origin. Run it against the same shipment data with additional customs-specific columns.
Results and Benefits
Logistics teams that automate label and document generation with Mergram see measurable improvements in their fulfillment operations:
- Elimination of mislabeled packages — all recipient addresses, tracking numbers, and order details are populated directly from verified shipment data.
- Scannable barcodes on every label — warehouse staff can scan tracking numbers and order IDs directly from printed labels, reducing pick-and-pack errors.
- 80% faster label preparation during peak seasons — generate an entire day’s labels in minutes instead of hours of manual work.
- Professional, branded documents that reinforce your company identity on every package that leaves the warehouse.
- Scalable to any volume — whether processing 50 or 50,000 shipments, the workflow remains the same.
Getting Started
Start generating shipping labels and packing slips in under 10 minutes:
- Export your shipment data from your shipping platform as CSV or Excel.
- Upload your label template to Mergram — use your existing layout or design a new one.
- Map fields and add barcodes — place address fields, tracking numbers, and barcode fields on your template.
- Preview and generate — verify a sample label, then run the full batch and download for printing.
No credit card required. Generate your first shipping labels for free.