Gltftostl
Convert glTF and GLB scenes to STL in your browser.
Description
Convert glTF and GLB scenes to STL in your browser. Geometry is kept, materials are dropped, and the file never leaves your device.
About Gltftostl
What is Gltftostl?
Gltftostl is a browser-based 3D converter that transforms glTF and GLB scenes into STL print files without uploading files to a server.
What Gltftostl does
Gltftostl decodes .glb files or .gltf files with sidecar .bin buffers entirely within the browser tab and writes them as STL. The tool bakes mesh nodes into world space, expands instances, and converts coordinates to millimetres while dropping materials and textures. Reading, processing, and writing happen on your device, and no model content is sent anywhere.
Who Gltftostl is for
People preparing 3D scene assets and game models before sending them to a slicer.
How Gltftostl works
Users drop a single .glb file or a .gltf file with its .bin sidecar into the browser tab, choose source coordinate units, inspect triangle statistics, and download the binary STL file.
Key features
- Decode and write files in the browser tab so the asset never reaches a server.
- Support for single .glb files and .gltf files with .bin buffers.
- Geometry flattening that bakes mesh nodes into world space and expands instances.
- Binary STL file export formatted for 3D printing.
- Source unit options to multiply coordinates to millimetres.
- Scene statistics showing triangle counts, vertex counts, and bounding dimensions.
Facts from gltftostl.com, checked 8 November 2026
- Processes files locally in the browser with no server uploads.
- Accepts .glb files and .gltf files with .bin buffers.
- Exports static geometry as binary STL files.
- Runs in the browser without an account, an upload, or a queue.
Written from Gltftostl's own website (Homepage, Features, About). The maker can claim this listing to edit it.
Categories
Frequently asked questions
What is Gltftostl?
Gltftostl is a single-purpose browser tool that converts glTF and GLB scenes to STL without uploading files.
Are 3D files uploaded to remote servers?
No. The scene is decoded in the browser tab and written as STL locally, so files never reach a server.
Which file formats are supported?
The tool works with a single .glb, or a .gltf together with its .bin.
Why are materials and textures omitted?
Materials, textures, and animations are dropped because the STL format stores static geometry only.
Is an account required?
No. The tool runs in the browser without an account, an upload, or a queue.
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