3D Slash
3dslash.net
Block-based 3D modeling that feels like Minecraft with tools: start from a cube and chisel, add and paint blocks to make a model. Very approachable for kids and beginners, with a free plan and paid plans for more featur…
Akritio
akritio.com
Browser tool from Navi3D that turns any 3D model into a print-ready casting mold. Free daily exports, with a Pro plan for unlimited use.
Blender
blender.org
Free, open-source 3D creation suite for modeling, sculpting, animation and rendering. It's not CAD (no precise parametric history), but it's unmatched for organic shapes, figurines and artistic models, and its 3D Print…
BumpMesh
bumpmesh.com
Free browser tool that adds real, printable surface textures to a model: wood grain, knurling, leather or your own image. It accepts STL, OBJ, 3MF and STEP and exports a displaced mesh, so the texture prints on any prin…
CookieCAD
cookiecad.com
Browser-based designer for custom cookie cutters and stamps: draw, type text or upload an image and it generates a printable cutter. It also runs a marketplace where you can buy ready-made designs or printed cutters.
Formlabs Texture Engine
formlabs.com
Formlabs' web app for adding printable surface textures to a model: upload an STL, choose a texture, adjust scale, depth and sharpness, then download a textured file to print. Textures look best on resin (SLA) printers;…
Formware Online STL Repair
formware.co
Free online tool that automatically repairs broken STL files (holes, flipped normals, non-manifold edges) so they slice cleanly. Upload, repair, download; nothing to install. It comes from Formware, a developer of slici…
FreeCAD
freecad.org
Free, open-source parametric CAD for designing mechanical parts, enclosures and anything else that needs exact dimensions. It runs offline on Windows, Mac and Linux and exports STL, STEP and 3MF for printing. FreeCAD ha…
Hi3D
hi3d.ai
AI tool from Hitem3D that turns a photo or a text prompt into a detailed 3D model you can print, with image-editing tools to prepare the picture first.
iMPLICIT Build
implicit.build
Check stress on parts and remove unnecessary material while keeping the part strong. Plans include free plans for individuals, paid plans for businesses and large companies, and even plans for use in education.
Layerling
layerlings.com
A free, browser-based alternative to Tinkercad for building printable models from simple shapes. Its standout feature is an AI connection that lets Claude (Anthropic's AI assistant) build or edit models from a plain-lan…
MeshLab
meshlab.net
Free, open-source program for processing and repairing 3D meshes, especially large or messy ones from 3D scans. It can clean up, simplify, fill holes, align scans and convert between formats. MeshLab has been developed…
Meshmixer
apps.autodesk.com
Autodesk's free tool for editing and repairing STL meshes: sculpting, hollowing, cutting, combining models and generating tree supports. Autodesk stopped developing Meshmixer around 2021 and folded some of its features…
Model Spiralizer
cnckitchen.github.io
Free browser tool from CNC Kitchen that coils a long, strip-shaped STL into a flat spiral and exports a new STL, handy for fitting long parts on a small build plate. You set the inner radius, pitch and winding direction…
MoldMaker AI
moldmakerai.com
Free AI mold generator: upload a model and it creates a printable mold you can use for casting resin, silicone, soap, concrete and more.
MoldStudio3D
moldstudio3d.com
Browser-based mold designer for 3D printing: generate two-part molds from an STL, plus dedicated tools for candle, soap and ceramic slip-casting molds and a stamp maker.
Onshape
onshape.com
Professional parametric CAD that runs entirely in a web browser, with mobile apps for viewing and editing on the go. Files live in the cloud, so there's nothing to install and real-time collaboration is built in. The fr…
OpenSCAD
openscad.org
Free, open-source CAD where you write code to describe a model instead of drawing it. Ideal for parametric parts and customizers; many customizable models on Thingiverse and MakerWorld are OpenSCAD scripts. First releas…
SelfCAD
selfcad.com
Browser-based 3D modeling that combines sketching, sculpting and mesh tools with a built-in slicer, aimed at beginners, hobbyists and schools. A free plan covers basic use; advanced tools need a subscription.
Shapr3D
shapr.com
Professional CAD designed around touch and Apple Pencil, with full versions for Windows and Mac. It's one of the most approachable precise-modeling tools: sketch, push and pull, then export STEP or STL. A free plan allo…
SketchForge
sketchforge3d.com
A lightweight 3D modeler that runs in your browser and keeps your files on your own computer, with no account needed. It covers the essentials: primitive shapes, dimensioned alignment, sketch-based extrude and revolve,…
SolidVents
solidvents.com
Free web tool for generating parametric vent and surface patterns (Voronoi, hexagons and more) that you can export as 3D models and drop into your design. Handy for vents, grilles, speaker covers and decorative panels.
Vega3D
vega3d.com
Collection of online 3D tools in one place: an AI 3D model generator, 3D text and vase generators, a mold maker, a model viewer and an online slicer.