SmartPacker T1
Single SKU Loading

Calculate how one carton type fits into a container, a pallet area, leftover container space, or a larger box—then inspect the result in 3D. Free, no sign-up.

Try Online Read Manual

Try the Web App

Change the carton size or quantity in the panel below. Open the web app full-screen when you need more room for the 3D view.

The classic version runs entirely in your browser—it keeps working even when the online service is busy or you're offline.

Open Full-Screen Classic Web App

Use T1 in Your AI Assistant

T1 is also an MCP server: add it to an MCP-capable assistant (Claude, ChatGPT, Cherry Studio, and more) and ask in plain language—“how many 600×400×350 boxes fit in a 40HQ?” The count, fill rate, and a 3D loading image come back in the chat. Free, no sign-up, no API key.

https://mcp.zhihuo.net/mcp (Streamable HTTP) — what is MCP?

Setup and example questions
  1. In Claude (Desktop or claude.ai): Settings → Connectors → Add custom connector → paste the address above.
  2. In Cherry Studio: Settings → MCP Servers → Add → choose “Streamable HTTP” → paste the address → enable.
  • “How many 600×400×350 cartons fit in a 40HQ container?” — presets include 20/40/45 GP·HQ, 53HC/48HC, reefers, and EU pallet-wide; the 3D view shows the exact interior dimensions used.
  • “How many 600×400×350 boxes fit in a 2000×1000×1000 space?” — any rectangular space: a pallet area, leftover container space, or a larger box.
  • “Load 120 cartons toward the front of a 40-ft container and show the plan.”

T1 WebAPI for Developers

For direct integration, send one carton size plus a container preset or explicit space dimensions to POST https://mcp.zhihuo.net/api/t1/pack. The response returns the count, fill rate, placed loading regions, and a shareable 3D image URL. Free, no sign-up, no API key.

OpenAPI JSON Health check

Published T1 Benchmark

A fixed 10,000-case single-SKU 40HQ benchmark: full CSV corpus, generator, and dated spot checks against public loading tools. In the June 2026 refresh, T1 depth 3 won 7,873 of 10,000 cases against a transparent six-orientation baseline, tied the rest, lost none—2.656% more cartons on average.

Download CSV Local CLI for self-run verification
Read Benchmark

Desktop apps 0.1.1

Pack offline on Windows, Apple silicon Mac, or Linux with the same T1 planning view.

Windows: This first release is unsigned; if Microsoft Defender SmartScreen appears, choose More info, then Run anyway.
Mac: Apple silicon, notarized; delivered as a ZIP — unzip to get the DMG.
Linux: delivered as a ZIP; unzip, then run chmod +x SmartPackerT1-0.1.1.AppImage before first launch.

File sizes and SHA-256
  • SmartPackerT1-0.1.1-Setup.exe — 100,390,786 bytes; SHA-256 54afaaf85ac974a2fd5572ab900f58fcaf1aef793f401f86703926363721737f.
  • SmartPackerT1-0.1.1-arm64.dmg.zip — 113,507,607 bytes; SHA-256 22ab39071560e2e81a79c1e7fda7fa3977f6d2951e19ea38ae4a590510ea3042 (contains the notarized DMG, SHA-256 8b67e8f041237bb0c5b65cde0656b11ed36f83647652bf215bc8af013c1b6c31).
  • SmartPackerT1-0.1.1.AppImage.zip — 119,315,322 bytes; SHA-256 bd52bb05c757494a64159eaeb6a7679cb5f0d8818d64dcd7c86c0cd2afebe1cc (contains the AppImage, SHA-256 6268b054741b2ee2c5623133b6439f5a86b1cd9423e02ecd2e4f68096fcbca17).
Windows installer Mac for Apple silicon Linux AppImage

Command line

A Windows command-line copy of the same loading calculation, for checking the published benchmark numbers on your own PC.

Local CLI ZIP

What T1 Helps Answer

SmartPacker Single Carton plans how one type of carton fits into a single loading space. That space can be the full or remaining interior of a container, the area above a pallet, or a larger box that holds smaller cartons.

Enter the length, width, and height of the loading space and the carton. T1 calculates a plan for the maximum quantity and shows it in a 3D viewer.

Full Container Load

Find the maximum carton count for a known container space.

LCL or Fixed Quantity

Set a fixed carton count and find the minimum height, width, or length needed.

Package Design

Test carton-size tolerances or deformation allowances before locking in a packaging design.

Demo 1: input dimensions and calculate a loading plan

3D Viewer

The loading plan is broken into groups, listed alongside the view. Use the checkboxes to show or hide each group, drag to rotate the view for a full 360° look, and use the mouse wheel to zoom.

A green triangle marks the front face of each carton; a white triangle marks the side face. Together they let you read the orientation of every loaded group.

Demo 2: show or hide groups and inspect carton orientation

What-if Controls

Spin the mouse wheel over a number field to nudge it up or down. This makes it quick to test how the loading space or carton size changes the result—useful for checking clearance, tolerance, or alternative package designs.

Demo 3: reduce space height and see the loading pattern adapt
Demo 4: adjust carton size to check fitting tolerance

Fixed Quantity and LCL Planning

When the carton quantity is fixed, such as in an LCL shipment, enter the quantity and choose whether to load for minimum height, width, or length.

Demo 5: fixed quantity with minimum-space planning

You can also vary the carton quantity to see how the loading pattern evolves, then settle on a practical shipment size.

Demo 6: vary quantity and compare loading patterns

Questions and comments: zhzx@zhihuo.com.

Other Editions

Use T1 for a single carton type. Switch to another edition when the shipment contains multiple SKUs.

T1

Single SKU

This page. Use it for one carton type and one loading space.

Try T1
T3

Multi-SKU, Rotation Allowed

For mixed cargo that's free to rotate through any of six orientations.

View T3
U3

Multi-SKU, Upright

For mixed cargo that should remain upright during loading.

View U3