Free 3D printing tools
Small, fast utilities for everyday 3D-printing jobs — convert file formats, inspect models, match colors. No signup, no upload; everything runs on your device. Built by the team behind Layerpaint.
3D Model Converter
3MF to STL, STL to 3MF, OBJ to STL, GLB to STL — every direction between STL, OBJ, 3MF and GLB. Drop a file, preview it in 3D, pick the output, download. Runs in your browser, nothing uploaded.
Open converter →STL Viewer
Open and inspect STL, OBJ and 3MF models right in the browser — rotate, zoom, and read off triangle counts and dimensions.
Open viewer →STL Repair
Fix non-manifold edges, holes, flipped normals and duplicate shells in STL, OBJ and 3MF — with before/after counts, not a vague "fixed". No upload, no size cap.
Open repair tool →3MF Recolor
Change the colors of a painted or multicolor 3MF without repainting — swap each detected color for any hex or a real filament you own, preview live in 3D, download.
Open recolor tool →Filament Color Matcher
Paste a hex or pull a color from a photo and find the closest real filaments across Bambu, Polymaker, Prusament and more — ranked by perceptual color match.
Open matcher →Want to add color to your model? Layerpaint paints per-region colors onto STL, OBJ and 3MF and exports a Standard 3MF your slicer prints in multiple filaments.
Open the painter →🔒 Every tool runs locally in your browser — your files are never uploaded.