Best Gridfinity Generators Compared (2026)

Gridfinity is the open-source, nestable storage system that has quietly become the default for organized 3D printing workshops. But generating the bins themselves is still a pain point: hand-modeling a custom bin in CAD takes an hour, and most of you just want the bin, not the CAD lesson.

That is what Gridfinity generators solve. You describe what you need — dimensions, label, lid style — and the tool outputs a printable file. The question is which tool does it best, and in 2026 the answer depends on what you are actually trying to build.

I looked at the four active Gridfinity generator tools that matter in 2026: Tooltrace, GridPilot, GridFinityGenerator, and OnShape FeatureScript. This comparison covers what each one does well, what it does not, and which one you should actually use.

Full disclosure

Some links on this page (the gear section) are Amazon affiliate links. If you buy through them, I earn a commission at no extra cost to you. It does not change my recommendations — I would tell you if a tool was bad regardless of whether I earn a cent from it.

What Is a Gridfinity Generator?

Gridfinity is an open-source system of interlocking storage bins, originally designed by Zack Freedman and now community-maintained. The bins snap into a standard grid, nest when empty, and can be labeled, lidded, and sized in standard bay increments.

A Gridfinity generator is a web tool that takes your bin specifications — size, label text, lid style — and outputs a 3D-printable file (usually STL, sometimes STEP or 3MF). Instead of modeling a bin from scratch in a CAD package, you configure it in a form and download the result. The good ones handle the tricky geometry (filleted corners, standard Gridfinity footprints, interlocking tabs) so you do not have to.

The Four Generators, Ranked for 2026

Feature Comparison Table

Pricing verified October 2026. Always check the vendor's site for current pricing before purchasing.

Gear You Will Need to Print These

A generator gets you the file, but the bin is only as good as the filament it is printed in and the storage setup that keeps the filament dry. Here is what I run, all on Amazon through the links below.

Filament for Gridfinity Bins

Bins are flat-footed, mostly vertical, and print support-free — that is exactly what PLA is good at. It is cheap, easy, and strong enough for storage. If you want the bins to be slightly more impact-tolerant (dropped lids, heavier contents), PETG is the step up.

Bambu PLA Basic ·Overture PLA+ ·Overture PETG

Keeping That Filament Dry

A bin printed from dry filament is a clean bin. A bin printed from a spool that has been sitting open is one with stringing, blobs, and brittle walls. Desiccant, a vacuum sealer, and a dry box are the cheap insurance that keeps the whole batch consistent.

Desiccant packs ·Vacuum sealer ·Filament dry box

Gear links are Amazon affiliate links. I earn a commission on qualifying purchases at no extra cost to you.

Which Generator Should You Use?

Just needs 20 bins this weekend? GridFinityGenerator.com. Free, no account, point and click. You will not outgrow it unless you start customizing geometry.

Building a 200+ bin system with custom sizes? Tooltrace. The inventory management workflow and polished UI pay off when you are generating dozens or hundreds of bins and need to track what you have made.

Wants DXF or 3MF files, or photo-based tray design? GridPilot. The area-based free tier (100 in² of export per month) is a different model from the others, and the DXF/3MF export options are useful if you are working outside the standard 3D printing workflow.

Needs STEP files for mechanical parts? OnShape FeatureScript. If you are an engineer and you need parametric control or STEP output for downstream CAD work, nothing else in this list competes. The learning curve is real, though.

Budget zero and want the most flexibility? GridFinityGenerator.com for simple bins, OnShape free tier for complex ones (as long as you are okay with public documents).

How I Researched This

I verified each tool was live and accessible as of October 2026, checked their pricing pages, and reviewed their documented feature sets. GridPilot had a 3+ day outage in early October (503 errors from Oct 2 through Oct 5) and was confirmed back online on October 7 with its full feature set and pricing restored. All other tools were continuously available. This review reflects availability and pricing as of October 8-9, 2026 — link health will be re-verified on the weekly blog audit.

Hands-on testing with identical test scenarios (custom 4×6 bin, angled lid, embossed label) is planned and will update this page with timing data, screenshot comparisons, and export quality notes. Until then, the recommendations above are based on documented features, pricing, and the tools' stated capabilities.

FAQ

Can I print Gridfinity bins in PLA without supports?

Most standard Gridfinity bins print support-free in PLA on a bed-slicer platform. The geometry is designed with this in mind — the walls are steep enough and the footprints are flat. Custom bins with very deep pockets or complex lid geometries may need supports, but the standard bin shapes from any of these generators are generally support-free.

Are all Gridfinity generators compatible with standard Gridfinity footprints?

Yes, all four tools in this comparison output bins that conform to the standard Gridfinity footprint (the community-maintained open-source spec). The differences are in customization options, export formats, and workflow — not in whether the output is Gridfinity-compatible.

What's the difference between a generator and a CAD script?

A generator is a web form: you fill in dimensions, pick a lid style, download the file. A CAD script (like an OnShape FeatureScript or a FreeCAD macro) is code you can edit to change the geometry programmatically. Generators are faster for standard bins; scripts are more powerful for custom geometries. OnShape FeatureScript falls in the middle — it is a script, but you do not have to write it from scratch if you find an existing one.

Do I need an account to export STLs?

GridFinityGenerator.com does not require an account for basic use. Tooltrace and GridPilot have free tiers that may require registration. OnShape requires an account (free for public documents). If you plan to export frequently, budget a few minutes for sign-up. Check each tool's current policy before relying on it for a time-sensitive print job.

This page may contain affiliate links. As an Amazon Associate I earn from qualifying purchases. Pricing information was verified in October 2026 and may have changed.