OwlCAD is a print-aware 3D modeler with parametric solids, sketch-to-extrude, fillets, and AI-assisted generation. It's parametric from the first click — easy to start, and you won't outgrow it. Model, repair, and export print-ready STL, 3MF, OBJ, GLB, or STEP — no install, nothing to download.
Free to use · Private by default · Runs in your browser · Start without an account
Everything you need to take an idea from a blank build plate to a print-ready file.
A dozen-plus primitives — box, cylinder, sphere, cone, torus, tube, pyramid, wedge, rounded box, and 3D text. Union, subtract, and intersect them non-destructively; tweak a dimension and the whole model rebuilds, powered by the Manifold engine in a Web Worker.
Draw a 2D profile on the build plate and pull it straight up, revolve it 360°, twist it into a helix, sweep it along a path, or loft between profiles. Round edges with fillets or chamfers, and hollow any part into a printable shell.
Describe a part and get back a parametric node tree with live dimensions — not a locked mesh. Change a number and the model rebuilds; undo it like any other edit. Sculpted-mesh and precise text-to-CAD models are there for organic and exacting work. Included with OwlCAD Pro.
Position parts relative to each other with mates, articulate a joint, and scrub the motion to confirm it moves and fits — before you print. Pattern parts in linear, circular, grid, or mirror arrays.
Publish a model with the parameters you choose, and anyone can adjust the dimensions, counts, and text with sliders in the browser, then download their own print-ready version. No OpenSCAD required.
Drop in a reference photo and model on top of it, calibrated to real dimensions. Switch to a true orthographic 2D view locked to any plane, and sketch or trace on any face — not just the build plate.
Work in true millimeters against printer profiles for Ender 3, Prusa, and Bambu Lab. Auto-orient, scale to fit the build volume, check that meshes are watertight, and repair geometry before it reaches your slicer.
Import existing models — units are detected and corrected on the way in — and export clean STL, 3MF, OBJ, GLB, solid STEP, or SVG ready for any slicer or CAD tool.
Projects are private by default. Work autosaves locally and to the cloud once you sign in, with version history you can roll back. Publish a read-only share link, embed a model in any page, or collect comments — only when you choose to.
Open the editor and drop in a primitive or sketch a profile. No install, no account required to begin.
Combine solids with booleans, round edges with fillets, pattern and mirror parts, and dial in exact dimensions in millimeters with snapping gizmos.
Pick a printer, auto-orient on the plate, verify the mesh is watertight, and export STL, 3MF, OBJ, GLB, or STEP straight to your slicer.
Describe a part and OwlCAD’s parametric mode returns a real node tree — primitives, booleans, and transforms with every dimension still live. Change 30 mm to 32 mm and the part rebuilds; undo it like any other edit. Sculpted-mesh and precise text-to-CAD models are a click away when the shape calls for them. Generation is part of OwlCAD Pro.
Open the editor and place your first solid in seconds. No download, no sign-up to start.