Free Online PTX to STL Converter

You can use our PTX to STL conversion tool to quickly and easily convert your 3D model files for free. You may upload up to 20 files at one time, and our batch PTX to STL converter will process each 3D model and present you with a download link for each file once completed.

Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.

Please note: Your PTX file, once uploaded to our server, will be deleted 15 minutes after upload, so please download your converted PTX file before this time.

Our 3D model PTX to STL tool will load your PTX file and, where supported, attempt to extract all the relevant 3D features, such as geometry, textures, and animations. To access the 3D conversion configuration options, click the button when you have selected your files. The current options support the ability to voxelize your 3D model and more.

How to Convert your PTX to STL Online?

Here are two simple steps to convert your PTX to STL using our fast and free PTX converter tool.

Upload your PTX file

Click the "Upload a PTX File" button, then select a PTX to upload. The maximum file size is 100MB.

Download your STL

Click the download link to receive your STL file.

Frequently Asked Questions

How can I convert my PTX file to STL?

First, click the "Upload..." button and select your PTX file to upload. Your PTX file will be uploaded to our servers. When the PTX to STL conversion has completed, you can download your STL file right away.

How long does it take to convert my PTX to STL?

We aim to process all PTX to STL conversions as quickly as possible; this usually takes around 5 seconds; however, this can be longer for certain files, so please be patient.

How accurate is the conversion from the STL 3D point cloud format?

Our PTX tool will read all the vertex information from your STL file and use only this information when creating the final STL file.

File format information for PTX and STL

Full NamePoint Cloud
Type3D Model/Point Cloud
Mime Typetext/plain
Opens WithMeshLab

A PTX file is a 3D point cloud file format. Containing only vertex positional information about the 3D object allows the format to remain simple and easy to implement in 3D modeling applications where only positional data is required.

Inside a PTX file is plain ASCII content containing each vertex position on a single line of the text document. It is also possible to specify a color for the point, allowing for full-color point clouds to be stored and rendered.

Support for opening and displaying PTX files is limited; however, there are various specialist 3D applications that work with point clouds that can be used to open PTX files.

PTX Converter Capabilities

When converting 3D model or mesh files using our PTX converter, we will attempt to convert color materials into a suitable format for use in the converted file.

Full NameStandard Triangle Language
Type3D Model
Mime Typeapplication/
Opens WithBlender, MeshLab, CAD Assistant, DAZ Studio

The STL, or Standard Triangle Language, file format has been around since the '80s and is supported by most modern 3D modeling applications. In particular, the STL format has become something of a standard format within the area of 3D printing, despite the rise of more modern formats such as 3MF.

STL files come in two flavors: binary or text format. The text format is human-readable, making it easy to perform manual edits, but can lead to very large file sizes. As you can imagine, the binary format is much more compact and represents the majority of the STL files you are likely to encounter.

The format itself is very simple; the 3D model is represented by a sequential list of triangles, with each triangle defined with 3 points consisting of their X, Y, and Z positions, along with an additional vector that contains the face normal (the direction the face is pointing). There is an additional attribute block for each triangle; however, this is largely unused and thus unsupported.

STL Converter Capabilities

When converting your PTX to STL, our tool will attempt to accurately convert any color or material information.

Information for converting from PTX to STL

Your PTX file will be converted to a STL file using our unified 3D model and mesh conversion tool. Our PTX 3D tool performs accurate conversions of 3D elements such as vertices, faces, normals, and relevant material information. As both PTX and STL support color material information, our tool will also attempt to convert the color information.

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