Inspect models.
Understand G-code.
Dimensions, meshes and print checks for your models. Layers, paths and cost analysis for your G-code. One fast, private workbench — no uploads, no account.
STL, 3MF, OBJ, PLY, G-code, GZ, bgcode or G-code 3MF
Choose a fileSix focused tools
Inspect, understand and prepare your print files without installing anything.
Model Inspector
Inspect dimensions, topology and printability.
STL · 3MF · OBJ · PLY
G-code Viewer
See every layer and toolpath in 3D or 2D.
GCODE · GZ · BGCODE · 3MF
G-code Analyzer
Time, filament, weight and cost.
GCODE · GZ · BGCODE · 3MF
G-code Converter
Normalize containers and line endings.
GCODE · GZ · BGCODE · 3MF
Thumbnail Studio
Extract, generate and embed previews.
GCODE · GZ · BGCODE
G-code Editor
Find, replace and tune without surprises.
GCODE · GZ · BGCODE
Built for the files you actually print
A quiet, fast workbench that keeps the model and the machine path in view.
Local by design
Parsing, measurement and analysis happen on your device. Your models and print files never touch a server.
Large files, handled
Workers keep the interface responsive. Big meshes and long G-code files load with progress, cancellation and clear limits.
Print-aware
Build plates, overhangs, watertightness, layer times, filament estimates and material cost — the numbers that matter before you print.
One flow, from mesh to motion
Start with the shape, finish with the path.
Inspect the model
Open STL, 3MF, OBJ or PLY. Check size, volume, shells, overhangs and plate fit.
Understand the G-code
Watch layers, inspect travel and extrusion, and see where time and filament go.
Refine and export
Analyze cost, convert containers, update thumbnails or make targeted edits — then download a validated file.
Questions, answered
Are my files uploaded?+
No. Every parser and renderer runs in your browser. Files are never sent to FabKit or any third party. Analytics only records anonymous page-level events.
Do I need an account?+
No account, no sign-in and no cloud storage. Open the site and drop a file.
Which formats are supported?+
Models: STL, 3MF, OBJ and PLY. G-code: .gcode, .gco, .g, .nc, .ngc, .tap, .cnc, .txt, .gcode.gz, .bgcode and G-code inside .gcode.3mf.
Does it work on a phone?+
The site is responsive and the G-code tools work on mobile. Large models are best inspected on a desktop; FabKit warns before a file is likely to exhaust mobile memory.
Open a file. See what your printer will do.
No uploads. No account. Your next print check starts here.
Open the workbench