The complete STL conversion toolkit for 3D printing
Transform any 3D file format to printer-ready STL — fast, accurate, and entirely private. STLConvert helps you go from concept to print without installing heavy desktop software.
Choose Your STL Converter
STLConvert handles every major 3D file format. Pick the tool that matches your workflow and convert directly in your browser — no uploads, no paywalls.
3MF to STL
Fix compatibility issues from PrusaSlicer, Cura, and Microsoft 3D Builder in seconds.
OBJ to STL
Convert meshes from Blender, Maya, and ZBrush without losing topology or normals.
STEP to STL
Engineering-grade STEP conversion for CAD and manufacturing teams — launching soon.
About Stlconvert
We solve one problem perfectly: converting 3D files to STL format. STLConvert was built by 3D printing enthusiasts who were tired of bloated desktop software and unreliable exporters.
- Universal compatibility: Works with files from Fusion 360, SolidWorks, Blender, Maya, SketchUp, and more.
- Instant processing: Most conversions finish in under a second thanks to optimized Three.js pipelines.
- Quality guaranteed: We preserve mesh integrity and repair common export errors automatically.
- Always free: No accounts, no limits, and your models never leave the browser.
files converted successfully
Whether you are preparing a quick hobby print or mission-critical engineering prototype, STLConvert keeps your workflow moving. We handle complex assemblies, multiple shells, and high-resolution meshes without fail.
Try our live converterTrusted by Makers and Product Teams
From classrooms to production floors, STLConvert keeps 3D printing pipelines running. Here’s what users say about the toolkit.
“Teaching 3D design means wrestling with dozens of file types. STLConvert makes every format classroom-friendly with zero install headaches.”
“Clients send OBJ, STEP, and DAE files daily. This toolkit produces clean STL output that slices perfectly — better than paid desktop apps.”
“We run 200+ print jobs every month. STLConvert slotted into our workflow and eliminated file prep delays. The reliability is unmatched.”