Free Online 3D Tool

Try the PLY / OFF / AMF / GLB / FBX / 3DS to STL

Convert 3D scans, game assets and downloads — PLY, OFF, AMF, GLB/glTF, FBX and 3DS — to print-ready STL (or 3MF, OBJ). Fixes Y-up/Z-up and metre/millimetre.

Try it free See how it works

Free to use
No signup
Nothing to install
Runs in your browser

Free to use

No signup

PLY / OFF / AMF / GLB / FBX / 3DS to STL

Example

A 0.05 m wide GLB model (metres, Y-up) converts to an STL 50 mm wide standing upright on the Z axis; a binary PLY scan with 200k triangles becomes a binary STL of about 10 MB.

Open the PLY / OFF / AMF / GLB / FBX / 3DS to STL

Illustration. Open the tool for the real thing.

See it in action

Sample input: File = sample.stl; Extra scale factor (1 = unchanged) = 1. Pressed Convert.

Screenshot of the PLY / OFF / AMF / GLB / FBX / 3DS to STL with sample data entered: Sample input: File = sample.stl; Extra scale factor (1 = unchanged) = 1. Pressed Convert. — Sample data entered into the PLY / OFF / AMF / GLB / FBX / 3DS to STL. Open the tool to try your own.

Explained

What is the PLY / OFF / AMF / GLB / FBX / 3DS to STL?

3D models arrive in many formats: PLY from scanners and photogrammetry, GLB and glTF from the web and AR, FBX and 3DS from game and animation tools, AMF and OFF from research and older CAD. Slicers want STL or 3MF. This tool reads all of these formats directly in your browser and writes a clean, correctly scaled STL (or 3MF, OBJ, PLY, GLB).

The details that usually break prints are handled for you: glTF/GLB files are in metres and Y-up, so the converter scales to millimetres and rotates to Z-up; FBX is read in centimetres; polygons with more than three sides are triangulated properly; hierarchies with transforms are flattened. Then check the preview, volume and watertight status before downloading.

Try it free

Seven import formatsScale and axis fixesProper triangulation

3 steps to your result

Open the tool and follow along. Nothing to install.

Drop in your PLY, GLB, FBX, 3DS, AMF or OFF file.

Pick STL (or 3MF) and press Convert.

Check the preview and download.

What you get

Seven import formats

PLY (ascii/binary), OFF, AMF (also zipped), GLB/glTF, FBX, 3DS and OBJ/3MF.

Scale and axis fixes

Metres → millimetres and Y-up → Z-up for web and game assets.

Proper triangulation

Quads and n-gons are ear-clipped, not just fanned, so concave faces stay correct.

Instant mesh health check

See volume, size and watertight status before slicing.

Free to use

AZRS tools are free to open and use.

Nothing to install

It opens in your browser, so there is nothing to download.

Used for

Pick one to see how it fits.

Use case

3D-scanning users

Turn PLY scans into printable STL.

Try it free

How it compares

A plain look at this tool next to the usual alternative.

	This 3d tool	Desktop software
Install	Nothing to install	Usually an app or program to install
Account	No signup	Depends on the product
Cost	Free to use	Free or paid, depends on the product
Where it runs	In your browser tab	On your computer

Questions people ask

Does it support Draco-compressed GLB?

No. Re-export without mesh compression (Draco/meshopt) first.

What happens to textures and colours?

They are discarded; the output contains geometry only.

Can it convert point clouds?

No — a mesh with triangles or polygons is required. Point clouds need surface reconstruction first.

Is it free and private?

Yes — no signup, no limits, and files never leave your browser.

How do I use the PLY / OFF / AMF / GLB / FBX / 3DS to STL?

1. Drop in your PLY, GLB, FBX, 3DS, AMF or OFF file. 2. Leave 'Rotate Y-up → Z-up' on for GLB/glTF and game assets. 3. Pick STL (or 3MF) and press Convert. 4. Check the preview and download.