Convert STL to OBJ Online Free

Ready to Convert?

Upload your STL file and get a clean OBJ file back — free, instant, and no software to install.

Why Convert STL to OBJ?

OBJ's near-universal support makes it the safest bet when you're not sure what a downstream app will accept — from sculpting tools to 3D printers to game engines.

Whether you're preparing assets for universal interchange between apps or just need a format your current tool will accept, converting from STL to OBJ takes the compatibility guesswork out of your workflow.

Source Format

.STL — Stereolithography

Stereolithography is the standard mesh-only format used almost universally in 3D printing.

Commonly used in: 3D printers and slicers like Cura, PrusaSlicer, and Bambu Studio

Target Format

.OBJ — Wavefront OBJ

Wavefront OBJ is a simple, universal geometry format supported by nearly every 3D application on the planet.

Commonly used in: Blender, Maya, 3ds Max, ZBrush, and most 3D printers and viewers

How to Convert STL to OBJ

Upload Your STL File

Drag and drop or browse to select your STL file. Max file size is 200MB.

Select OBJ as Output

OBJ is pre-selected for you automatically on the converter page.

Download Your OBJ File

Click convert and download your file in seconds. Files auto-delete after 1 hour.

Common Use Cases

Preparing STL assets for import into tools that only accept OBJ
Cleaning up geometry and materials while switching to a more compatible format
Moving models between 3D printing and universal interchange between apps workflows
Sharing a OBJ file with a collaborator whose software doesn't support STL

Frequently Asked Questions

Upload your STL file to Convert3D, choose OBJ as the output format, and click Convert. Your OBJ file will be ready to download within seconds.

Yes. Convert3D converts STL to OBJ for free with no signup, no watermark, and no conversion limits.

Convert3D preserves geometry, materials, and embedded textures wherever the OBJ format supports them. Some attributes may not carry over if OBJ does not support that data type.

The maximum file size for conversion is 200MB.

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