STL Converter tools

Choose a workflow by the file you have, the output you need, or the mesh problem you want to inspect.

CAD and mesh to printable geometry

• OBJ to STL Converter — Turn Quads & N-Gons into Printable STL — Convert Wavefront OBJ files to Binary STL online up to 250 MB. Triangulate quads and n-gons, remove non-printable material links, and prepare the mesh for 3D printing.
• 3MF to STL Converter Online — Extract Printable STL Meshes — Convert 3MF slicer packages to clean Binary STL files online up to 250 MB. Extract raw triangle geometry for legacy 3D printers, CAD tools, and slicers.
• STEP to STL Converter Online — High-Precision CAD Tessellation — Convert STEP (.stp, .step) CAD files to high-resolution Binary STL online up to 250 MB. Preserve millimeter scale and smooth cylindrical curves for 3D printing.
• GLB to STL Converter — Turn glTF 2.0 Web Models into Printable STL — Convert GLB (Binary glTF) 3D models to printable STL files online up to 250 MB. Bake node hierarchies and inspect triangle meshes for 3D printing.
• FBX to STL Converter Online — Bake 3D Assets for 3D Printing — Convert Autodesk FBX models to printable STL files online up to 250 MB. Bake scene transforms, strip animation data, and check mesh normals before slicing.
• ZIP to STL Converter — Extract and Convert 3D Model Archives — Upload a ZIP archive containing OBJ, 3MF, STEP, FBX, GLB, or STL files and convert supported models into clean Binary STL outputs up to 250 MB.
• IGES to STL Converter | STL Converter — IGES files are processed by the conversion worker and exported as STL. Inspect the generated mesh before printing. Upload a source file to generate the result.
• SCAD to STL Guide | STL Converter — Convert OpenSCAD models to STL. Learn the correct workflow, limitations, and next step for a reliable STL result.
• BLEND to STL Converter | STL Converter — BLEND files are processed by the conversion worker and exported as STL. Inspect the generated mesh before printing. Upload a source file to generate the result.
• DAE to STL Converter | STL Converter — DAE files are processed by the conversion worker and exported as STL. Inspect the generated mesh before printing. Upload a source file to generate the result.
• PLY to STL Converter | STL Converter — PLY files are processed by the conversion worker and exported as STL. Inspect the generated mesh before printing. Upload a source file to generate the result.

Images and vectors to reliefs or extrusions

• PNG to STL Converter Online — Extrude Logos and Icons into 3D STL — Convert transparent PNG logos, icons, and 2D artwork into 3D printable STL files online. Create extruded keychains, stamps, cookie cutters, and reliefs.
• JPG to STL Converter Online — Photo Relief and Lithophane STL — Convert JPG/JPEG photos into 3D printable heightmap reliefs and lithophane STL files online. Map pixel brightness to Z depth for FDM and resin printing.
• SVG to STL Converter Online — Extrude 2D Vector Paths into 3D STL — Convert 2D SVG vector graphics into sharp, extruded 3D printable STL models online. Ideal for signs, cookie cutters, stencils, and logos.
• DXF to STL Converter Online — Extrude 2D AutoCAD Drawings — Convert 2D DXF CAD drawings into 3D extruded Binary STL solids online. Turn closed laser cutter and CNC polylines into printable mechanical parts.

Export an existing STL

• STL to OBJ Converter Online — Export STL for Blender and ZBrush — Convert Binary or ASCII STL meshes into Wavefront OBJ files online up to 250 MB. Weld duplicate vertices for editing and UV mapping in Blender, ZBrush, or Maya.
• STL to GLB Converter Online — Export STL for Web and AR — Convert STL meshes to compact GLB (glTF 2.0) files online up to 250 MB for Three.js, Shopify, PowerPoint, and AR previews.
• STL to FBX Converter Online — Bring Meshes into Unity and Unreal — Convert STL files to Autodesk FBX format online up to 250 MB. Import 3D scans and CAD meshes into Unity, Unreal Engine, Maya, and 3ds Max.
• STL to STEP Converter Online — Export Faceted CAD STEP Geometry — Convert STL triangle meshes into faceted STEP (.stp, .step) CAD files online up to 250 MB for Fusion 360, SolidWorks, and FreeCAD.
• STL to 3MF Converter for Modern Slicers — Package an STL mesh as a standards-compliant 3MF model for Bambu Studio, PrusaSlicer, and other modern slicers.
• STL to GCODE Guide | STL Converter — Prepare an STL for G-code slicing. Learn the correct workflow, limitations, and next step for a reliable STL result.
• ASCII to Binary STL Converter | STL Converter — ASCII or Binary STL files are processed by the conversion worker and exported as Binary STL. Inspect the generated mesh before printing. Upload a source file to generate the result.

Inspect, process and integrate

• Free Online STL Viewer — Inspect 3D Mesh, Face Normals and Open Edges — View Binary and ASCII STL files online in your browser up to 250 MB. Inspect wireframe topology, triangle counts, face normals, and open edges before slicing.
• Online STL Checker — Verify Watertight Manifold Meshes for 3D Printing — Check STL files online for 3D printing errors before slicing. Detect non-manifold edges, open boundary holes, inverted normals, and bounding box dimensions.
• Repair STL Online Free — Fix Holes, Non-Manifold Edges and Normals — Fix broken, non-manifold STL files online up to 250 MB. Close supported boundary holes, unify inverted face normals, and export a watertight Binary STL for slicing.
• Compress STL Converter | STL Converter — Compress an STL by removing duplicate vertices, duplicate triangles, and degenerate faces; an optional precision value quantizes coordinates before Binary STL export. Upload a source file to generate the result.
• Reduce STL File Size Converter | STL Converter — Reduce an STL triangle count with a controlled keep ratio, then export the reduced mesh as Binary STL for smaller files. Upload a source file to generate the result.
• Split STL Converter | STL Converter — Split a disconnected STL mesh into one Binary STL per connected component and download the parts as a ZIP archive. Upload a source file to generate the result.
• Merge STL Converter | STL Converter — Upload two or more STL or OBJ meshes and combine their triangle surfaces into one Binary STL. Overlapping shells are preserved; this is not a Boolean union. Select multiple files.
• STL Converter API documentation