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OwlCAD Customizers

35 free parametric generators in the browser, from gears and bearings to Gridfinity bins and jars

OwlCAD Customizers is a free browser tool for functional parts like gears, hinges and containers without learning CAD. The customizers and the editor are free; only OwlCAD's AI features need the Pro subscription. Exports STL and 3MF; no account needed. Last checked 16 October 2026.

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At a glance

Price: The customizers and the editor are free; only OwlCAD's AI features need the Pro subscription
Runs on: Browser
Exports: STL, 3MF
Multicolor: No, single color
Account: Not needed
Open source: No
Skill level: Beginner: fill in a form
Best for: Functional parts like gears, hinges and containers without learning CAD
Selling prints: Allowed OwlCAD's terms include commercial use on every plan, the free tier included: you may sell prints, sell or license the files and use them in a product, with no royalty and no attribution required.
How we checked: Opened the generator Customizers page read in a browser with no account; eleven of the generators opened and rendered their default part; pricing and terms read
Checked by: Mike Janssen
Last checked: 16 October 2026

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Sources: OwlCAD customizers, OwlCAD pricing, OwlCAD terms (checked 16 October 2026)

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What is OwlCAD Customizers?

OwlCAD Customizers is a collection of 35 free parametric generators inside OwlCAD, a browser-based CAD tool. You pick a model, set the dimensions, counts and features with sliders, and download an STL or 3MF, with no account and nothing to install. Each generator has its own page explaining what its settings do.

The range is wide and mostly functional: gear trains, planetary gearboxes, herringbone and bevel gears, rack and pinion, worm drives, pulleys, sprockets and timing belts; pin hinges, living hinges, ball joints, snap-fits and print-in-place bearings; springs, bolts and nuts, clamps and hose adapters; enclosures, board mounts, threaded jars and Gridfinity bins and baseplates. There are also text signs, lithophanes, cookie cutters, casting molds, fans and calibration prints. Standard parts are picked by name, such as a 608 bearing or a GT2 belt, so they fit what you already own.

You can open any result in the full OwlCAD editor to keep changing it, and the free editor also exports STEP, OBJ and other formats. Only the AI features need the Pro subscription. The terms give you full commercial rights to what you make on every plan, the free one included. Several of the generators also have their own listing here.