Right box. Every order. Zero guesswork.
Automate carton selection for every order with exact 3D coordinates, weight limits, and orientation rules.
P4P's cartonization software API automates box packing for shipping with exact placement coordinates, carton weight limits, and upright item rules so your fulfillment software gets predictable carton plans every time.
P4P selects the optimal carton for every order to reduce dimensional weight and minimize wasted space.
Respect carton max weight while packing fragile and upright-only items safely.
Return exact carton contents, item coordinates, and loading order to your WMS.
Get optimized carton plans in seconds from a single /api/pack request.
Manual packing leads to inefficiencies and higher costs. P4P's automated cartonization delivers consistent, optimized results that transform your fulfillment operations.
Everything you need to automate shipping carton packing within your fulfillment stack.
Choose the correct box size for each order mix to reduce dimensional weight penalties.
Support upright-only and fragile items while still maximizing carton fill.
Receive carton contents, placement coordinates, and order-ready packing lists.
Enforce carton weight caps and custom dimension constraints for every shipment.
Build stable cartonization into your WMS for consistent results across order cycles.
Use P4P payloads designed for cartonization, ready for fast integration.
built-inSend carton items and box definitions in a single call and get back a packing manifest ready for fulfillment.
{ "items": [ { "name": "Portable Kettle", "length": 10, "width": 10, "height": 12, "unit": "in", "quantity": 35, "weight": 2.8, "uprightOnly": true }, { "name": "Knife Set", "length": 15, "width": 5, "height": 3, "unit": "in", "quantity": 48, "weight": 1.5 } ], "containers": [ { "name": "Small Shipping Box", "length": 18, "width": 12, "height": 8, "unit": "in" } ], "maxContainerWeight": 32, "weightUnit": "lb", "optimizeBy": "volume" }
{ "id": "res_abc123", "createdAt": "2026-04-22T10:00:00Z", "containers": [ { "id": "cnt_001", "name": "Small Shipping Box", "length": 18, "width": 12, "height": 8, "unit": "in", "loadingMode": "topDown", "weightUnit": "lb", "totalWeight": 28.4, "utilization": 82.3, "cost": 0, "items": [ { "name": "Portable Kettle", "x": 0, "y": 0, "z": 0, "dx": 10, "dy": 10, "dz": 12, "nx": 1, "ny": 1, "nz": 2 }, { "name": "Knife Set", "x": 0, "y": 0, "z": 12, "dx": 15, "dy": 5, "dz": 3, "nx": 1, "ny": 2, "nz": 1 } ] } ], "unpackedItems": [] }
Get up and running with cartonization in your fulfillment systems faster than ever before.
Provide item dimensions, quantities, and packing rules to the API.
Set carton dimensions, weight caps, and upright-only requirements.
Get exact box placements, item coordinates, and load order.
Use the manifest in your shipping and warehouse execution workflow.
Common cartonization questions answered for developers and logistics teams.
Cartonization is the automated process of selecting and packing items into the most cost-effective shipping boxes for e-commerce orders, minimizing wasted space and shipping fees.
By selecting the smallest possible box for each order, reducing void fill materials, and optimizing dimensional weight calculations, cartonization helps minimize shipping costs for e-commerce businesses.
Automated cartonization provides instant box selection for every order, eliminates manual packing errors, integrates with order management systems, and delivers exact box coordinates as machine-readable output.
P4P handles diverse product shapes, enforces orientation rules for fragile items, supports custom carton sizes, and automatically selects the optimal box from your inventory for each order.
P4P optimizes for volume utilization, weight distribution, product protection, and shipping cost minimization while respecting all dimensional and weight constraints.
Definitely. P4P's pay-per-use pricing and no-setup integration make it perfect for small online stores, helping them compete with larger retailers through optimized shipping costs.
Automated cartonization consistently selects optimal boxes for every order, eliminates manual sizing errors, reduces waste and excess void fill, and provides exact box coordinates ready for your fulfillment systems.
Deploy P4P's cartonization API with your existing fulfillment stack and get exact box coordinates for every order in seconds.
$0.03 per request · No rate limits · No monthly fees