3D Printing Tools

Free browser tools to slice models, read and edit G-code, check overhangs, hollow models and arrange a build plate — nothing is uploaded.

Browser 3D Slicer

Slice STL, 3MF and OBJ models into printer-ready G-code in your browser. Nothing is uploaded.

G-code Viewer

Preview a sliced G-code file in 3D: layer by layer, coloured by feature, move type, speed or extruder.

G-code Analyzer

Measure a sliced G-code file: filament, cost, print time, layer heights, features, speeds, temperatures and every header setting.

G-code Editor

Change temperatures, speeds, fan settings and custom commands in a sliced G-code file, with a preview of every affected line.

G-code Thumbnail Extractor

Pull the preview images a slicer embedded in a G-code file back out, view them, and save them as PNG or JPEG.

G-code Flavor Converter

Convert G-code between Marlin, RepRapFirmware, Klipper, Smoothieware and Repetier where the mapping is exact — and list everything that is not.

3D Print Support Analyzer

Find the overhangs and floating islands in an STL or 3MF that will need supports, and estimate the support material they cost.

Build Plate Arranger

Pack several models onto a print bed automatically, drag them where you want them, and export the arranged plate as one model.

Mesh Hollowing Tool

Hollow a closed 3D model to a chosen wall thickness and see exactly how much resin or filament it saves.

Drain Hole Generator

Add real drain holes to a hollow resin model — click to place them, or let the tool find the lowest points.

STL Dimension Repair Tool

Fix models imported at the wrong scale. Infers the authored unit from the bounding box, converts between millimetres and inches, and bakes the new size into the geometry.

3MF Package Inspector

Open a .3mf archive and see everything inside it: the OPC part graph, objects, build transforms, materials, declared extensions, thumbnails and the slicer settings hidden in it.