Anyone who has printed for a few years has a downloads folder that has gotten out of hand. It holds STLs from model repositories, 3MF project files exported from a slicer, STEP files from a CAD session, and sliced G-code whose source model nobody can find anymore. HEXOstudios, a Mac app that builds a visual library on top of those files without touching them, released version 1.1 this month as a free update. VoxelMatters reported on October 23 that it is the app's biggest update since launch. It adds Rhino, FreeCAD, GLB, glTF and FBX support, renders G-code toolpaths in 3D, and includes memory management sized to the Mac it runs on.
The pitch is narrow, and that works in its favor. HEXOstudios is not a slicer, a modeler or a cloud service. It indexes, previews and launches files where they already sit.
What HEXOstudios Actually Does
At its core the app turns folders of 3D files into a grid of rendered thumbnail cards. According to VoxelMatters, nothing gets moved, renamed, converted or copied in the process. The library points at your existing directory structure and doesn't take ownership of it. The developer's site lists nested folder import as a feature, so a deep tree of project directories can be pulled in without flattening it.
That design matters to anyone who has tried a library tool that wanted to "manage" files by copying them into its own database or a proprietary folder layout.
On top of the thumbnails, HEXOstudios offers Smart Search, which VoxelMatters says recognizes format names and searches the folder the user is browsing. A panel the company calls File Passport shows metadata for the selected file: size, the source system that produced it, solid and face counts, triangle and vertex counts, and native colors. For 3MF files, the app shows colors plate by plate.
Twelve Formats, Now Including CAD-Native Files
The format list is the main change in 1.1. VoxelMatters lists twelve supported formats:
- Mesh and print formats: STL, 3MF, OBJ, AMF, PLY
- CAD exchange: STEP/STP
- Scene and real-time formats: USDZ, GLB/glTF, FBX
- CAD-native files: Rhino .3dm, FreeCAD .FCStd
- Machine output: G-code
The developer's homepage still shows the earlier lineup in its headline list (STL, 3MF, STEP, OBJ, AMF, PLY and USDZ), so the Rhino, FreeCAD, GLB, glTF and FBX additions are documented mainly in the VoxelMatters coverage for now. The site also describes a STEP pipeline called HEXOstpEngine, which it says is built into the app, so viewing STEP files doesn't depend on a separate CAD package being installed. VoxelMatters adds that a new HEXOrinoEngine opens Rhino 5 to 8 files in 3D without Rhino installed, and that FreeCAD files now show the model drawn from its exact geometry instead of the small picture saved inside the file.
Native Rhino and FreeCAD support is the more interesting addition for makers who design their own parts. Until now, a library tool focused on print formats would have shown those source files as generic icons, if it showed them at all. Seeing an .FCStd file as a rendered thumbnail next to the STL exported from it closes a real gap in finding which design produced which print file.
GLB, glTF and FBX point in a different direction. Those are formats for real-time graphics, games and AR, and they increasingly show up in model downloads and scan workflows. VoxelMatters says they are previewed in 3D with material colors but without textures. Supporting them puts HEXOstudios closer to a general 3D asset browser than a print-only catalog.
G-Code Toolpaths in 3D
For printing specifically, the most practical new feature may be 3D toolpath previews for G-code. A sliced file is opaque to the operating system: Finder shows a text document, and the only way to see what it will print is to open it in a slicer or send it to the printer. According to VoxelMatters, G-code files get color-coded toolpath cards in the library, and the Pro version adds a 3D view that lets users scrub through a sliced print from the first layer to the last, with a layer controller and print details alongside. That is useful when a folder has five iterations of the same part, sliced with different supports or layer heights, and the filenames differ only by a date stamp.
The 3D toolpath view is not part of the free tier. The developer's site lists full 3D preview of G-code toolpaths and File Passport for 3MF, STEP and G-code files as Pro features. Pro costs $24.99 as a one-time purchase, with a 14-day trial inside the app. The free version includes unlimited previews of STL, OBJ, AMF, PLY and USDZ files, plus 12 unique 3MF and 12 unique STEP previews.
Send to Slicer and Library Health
HEXOstudios doesn't slice, and it doesn't try to. It has a Send to Slicer function that passes a model to a slicer already installed on the Mac. VoxelMatters cites Bambu Studio as an example. The developer's site calls this dynamic slicer detection, meaning the app looks for whatever slicers are present and checks that each can open the format, rather than supporting a fixed list. In practice, it lets the library act as a front end: find the model visually, check its metadata, and hand it off with one action. The site lists Send to Slicer as a Pro feature.
The developer also describes HEXOforge, a convert-and-export feature, and Library Health, a set of tools for finding duplicate entries and oversized files and cleaning up. The site advertises 200,000+ files in a single import, and VoxelMatters says version 1.1 was qualified on one Mac with 475,902 unique 3D files occupying 494.73 GB, mostly STEP, OBJ and STL files. To handle libraries that size, heavy previews now get memory sized to the Mac they run on instead of one fixed limit.
Privacy by Omission
HEXOstudios runs locally. VoxelMatters notes that it requires no account, uses no cloud, and carries a "Data Not Collected" label on the Mac App Store. Many 3D model platforms now tie libraries to online accounts. Files for client work, patent-pending designs or plain personal projects never leaving the machine is a legitimate selling point, not just a missing feature.
What It Means for Makers
HEXOstudios solves a boring problem well, which is often the most useful kind of software. If your 3D files live across nested folders and several formats, and you mostly work on a Mac, version 1.1 makes the app much more relevant. CAD-native thumbnails, G-code toolpath previews and a direct hand-off to an installed slicer cover the path from design file to sliced job that most hobbyists follow.
The limits are clear. The app is Mac-only and requires macOS 14 or later, the 3D G-code view, File Passport and Send to Slicer sit behind the $24.99 Pro upgrade, and the app doesn't replace a slicer or a CAD package. But because it never moves or rewrites your files, trying it costs almost nothing. If it doesn't stick, your folder structure stays exactly as it was.
