Free 3D File Converter Online

Convert between GLB, STL, OBJ, and PLY formats instantly. No signup, no watermark, completely free.

Drag & drop your 3D file here

or click to browse (max 50 MB)

Instant Conversion

Server-side processing converts your files in seconds.

Private & Secure

Files are processed in memory and never stored on our servers.

No Limits

Unlimited conversions, no signup, no watermarks.

High Quality

Preserves mesh geometry accurately during conversion.

Supported Conversions

GLB to STL
Convert GLB (GL Binary) to STL (Stereolithography)
GLB to OBJ
Convert GLB (GL Binary) to OBJ (Wavefront Object)
GLB to PLY
Convert GLB (GL Binary) to PLY (Polygon File Format)
STL to GLB
Convert STL (Stereolithography) to GLB (GL Binary)
STL to OBJ
Convert STL (Stereolithography) to OBJ (Wavefront Object)
OBJ to STL
Convert OBJ (Wavefront Object) to STL (Stereolithography)
OBJ to GLB
Convert OBJ (Wavefront Object) to GLB (GL Binary)
PLY to STL
Convert PLY (Polygon File Format) to STL (Stereolithography)

Frequently Asked Questions

What 3D file formats can I convert?

Our converter supports GLB, STL, OBJ, and PLY formats. You can convert between most combinations including GLB to STL, STL to OBJ, OBJ to GLB, and more.

Is this 3D file converter free?

Yes, completely free. No signup, no watermark, no limits on the number of conversions. Just upload your file and download the converted result.

What is the maximum file size?

The maximum file size is 50 MB. Most 3D models are well under this limit.

Which format should I use for 3D printing?

STL is the universal standard for 3D printing. Every slicer software (Cura, PrusaSlicer, Bambu Studio) supports it. If your model is in GLB or OBJ, convert it to STL using our tool.

Which format is best for web and AR?

GLB (GL Binary) is the modern standard for 3D on the web and AR. It packs geometry, materials, and textures into a single file. Convert STL or OBJ to GLB for web use.

Are my files stored on your servers?

No. Files are processed in memory and immediately discarded after conversion. We do not store or retain any uploaded files.

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