A Gridfinity generator takes your input and produces a 3D printable bin or baseplate that follows the Gridfinity standard (42mm grid, standard base profile, stacking lip). There are two fundamentally different approaches: parametric generators where you type in dimensions, and photo-based generators where you snap a picture of your actual tool.
Both produce valid Gridfinity-compatible STL files. The difference is what kind of insert you are trying to make.
Parametric Gridfinity Generators
Parametric generators let you specify grid size (1x1, 2x3, etc.), bin height, wall thickness, divider count, and other dimensions. You enter numbers, the generator does the math, and you get an STL file. These tools are excellent for simple storage bins — places to dump screws, sort resistors, or store small parts in uniform compartments.
Popular parametric Gridfinity generators include the Fusion 360 GridfinityGenerator add-in, Gridfinity Rebuilt in OpenSCAD, the web-based generators at gridfinitygenerator.com and gridfinity.perplexinglabs.com, and the Onshape FeatureScript version. Most are free and open source.
What Parametric Generators Do Well
Simple bins with rectangular dividers. Baseplates in any grid size. Bins with label tabs, scoop fronts, magnet holes, and finger slides. If your storage need is "I want a 3x2 bin divided into 6 equal compartments," a parametric generator handles that in seconds.
Where Parametric Generators Struggle
Tool-specific cutouts. When you need a bin with a cavity shaped exactly like a Knipex Cobra 250mm or a Klein 11055 wire stripper, parametric generators cannot help. They generate rectangles, circles, and simple geometric shapes. They do not understand organic tool outlines with curves, pivot points, and asymmetric handles.
To make a tool-specific cutout with a parametric generator, you still need to open Fusion 360 or FreeCAD, manually sketch the tool outline, position it inside the bin, and cut the pocket. That process takes 20 to 45 minutes per tool and requires real CAD skills.
Photo-Based Gridfinity Generators
Photo-based generators take the opposite approach. Instead of typing dimensions, you photograph your actual tool on a sheet of paper. Computer vision traces the outline automatically. The generator builds a Gridfinity bin around that exact outline, producing a cavity that matches your specific tool within 0.5mm.
TracetoForge is the leading photo-based Gridfinity generator. You upload a photo, the app traces the tool, you set the grid size and cutout depth, and you export an STL with the correct Gridfinity base profile and stacking geometry. The entire process takes under 2 minutes.
What Photo-Based Generators Do Well
Any tool with a complex organic shape. Pliers, wrenches, screwdrivers with ergonomic handles, wire strippers, multimeters, utility knives. Anything you would struggle to sketch accurately in CAD. The photo captures the exact real-world dimensions including curves, cutouts, and irregular profiles that would take forever to model manually.
Multi-tool trays are another strength. Place 3 to 5 tools on a single tray, trace each one, and position them for the most space-efficient layout. A parametric generator has no concept of tool shapes, so this kind of optimization is impossible.
Where Photo-Based Generators Are Limited
Simple rectangular divider bins. If you just want a 3x2 bin with 6 equal slots and no tool-specific cutouts, a parametric generator is faster. Photo tracing adds no value when the shape is a basic rectangle.
Baseplates. Photo-based generators are designed for bins with cutouts, not for flat baseplates. Use a parametric generator or download a premade baseplate STL for that.
Which Gridfinity Generator Should You Use?
Use a parametric generator for simple storage bins, baseplates, and rectangular divider compartments. Use a photo-based generator like TracetoForge for tool-specific inserts where the cutout needs to match the exact shape of a real tool. Most serious Gridfinity users end up using both.
The combination is powerful. Generate your baseplates and basic bins parametrically. Then use TracetoForge to create precision tool inserts for your high-value tools — the ones where a perfect fit actually matters.
How to Create a Gridfinity Insert With TracetoForge
Open the TracetoForge Gridfinity generator. Place your tool on a white sheet of paper. Take a top-down photo with your phone. Upload the photo. The app auto-detects the paper for scale and traces the tool outline. Set your grid size, cutout depth, and finger notch preferences. Preview in 3D. Export as STL or 3MF. Slice and print.
The result is a Gridfinity bin with the correct 42mm grid spacing, standard base profile, stacking lip, and a precision-cut cavity shaped exactly like your tool. Compatible with any Gridfinity baseplate.
Try Both Approaches
Parametric generators are free and widely available. TracetoForge offers free tracing and previewing with export credits starting at $9.99 for 20 exports. Try the photo-based Gridfinity generator for your next tool insert and see the difference a precision cutout makes.