What is Gensert?
Gensert turns a photo of a tool or object into a Gridfinity bin with a cutout in its shape. You load a straight-on photo, draw a scale line over something of known length and type that length, then click points around the object to trace its outline, with a smoothness slider. The outline is not detected for you, so the result depends on how carefully you click.
The bin is sized to the outline on its own, and you can add extra bins of width or depth, set the bin height in Gridfinity units, the cutout depth and the insert height. Options include a regular lip, no lip or no lip at full height, and magnet holes, refined holes, corner-only holes, screw holes, crush ribs, chamfered holes, a printable hole top and a thumbscrew.
The geometry is made in the browser with OpenSCAD and the gridfinity-rebuilt library, and the tab can freeze for a few seconds while it works. You get an STL of the bin and can save the traced outline as SVG. It is free with no account; the repository has no license and nothing about selling prints, and it has not changed since July 2025. It suits people who want a free shadow-board style insert and do not mind tracing by hand.
What you can make
- Gridfinity bins with a tool-shaped cutout
- Fitted inserts for hand tools
- Traced outlines as SVG
How to use Gensert
- Load a straight-on photo of the object
- Draw a scale line over a known length and enter it in mm
- Click around the object to trace it, then Export Outline
- Set the depth and options, click Generate and download the STL
What you'll need to print it
Filament and parts that suit what you make with Gensert.
Matte PLA
6 x 2 mm magnets
Also handy
Print removal and cleanup tools
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Gensert pros
- Free photo-based tool inserts, unlike most paid tracing tools
- Bin size follows the traced outline automatically
- Lip, magnet, screw hole and crush rib options from gridfinity-rebuilt
Gensert cons
- You trace the outline point by point; there is no automatic detection
- Plain interface, no 3D preview of the result before download
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Gensert alternatives
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Binforge
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GridfinityStudio (gridfinitystudio.com)
Plan a whole Gridfinity drawer in 3D, with bins, baseplates and photo-traced tool holders, then export STLs