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Best 3D file converter of 2023

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The best 3D file converters make it simple and easy to convert proprietary 3D file formats into other file formats that you can use in other applications.

As the number of software tools for creating 3D files has expanded, so too has the number of file types. Many software publishers, like AutoDesk and Blender, have their own proprietary 3D file formats. In addition, neutral file formats designed to work with every major 3D software tool have only added to the number of standards currently in use.

With all these file types flying around, it’s essential that anyone working with 3D design tools, animations, or 3D printers have a reliable file conversion tool. Ideally, you need a tool that can interconvert between all the major proprietary and neutral formats as well as the STL format that 3D printers require.

In this guide, we’ll help you eliminate 3D file headaches by highlighting five of the best 3D file converters you can use today.

You may also be interested in our featured best architecture software.

Why you can trust TechRadar Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

(Image credit: Meshconvert)

1. Meshconvert

Free online 3D file converter for mesh files

Today's Best Deals

Reasons to buy

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Free to use

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Supports 37 input file types

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Online tool for ease of use

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Can convert files hosted online

Reasons to avoid

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Only converts to four neutral file types

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Slow uploads for large 3D files

If you’re looking for a completely free 3D file converter, Meshconvert is a good place to start. As the name suggests, this program is designed solely for mesh files and not constructive solid geometry files. It currently supports around 37 input file formats, including Blender BLEND files, AutoCAD DXF files, and neutral STL and OBJ files. 

The downside to Meshconvert is that the file types you can convert to are relatively limited. Meshconvert only converts 3D files to STL, OBJ, COLLADA, and PLY file types. 

Meshconvert is hosted online, so there’s no need to download a program. That makes this solution quick and simple for small files. If the 3D file you want to convert is hosted online, you can also give Meshconvert the URL to avoid another upload.

(Image credit: NCH Software)

2. Spin 3D

Supports file previews and batch conversions

Today's Best Deals

Reasons to buy

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Supports 45 input formats

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Outputs to 3DP and 3DX

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Preview input and output before conversion

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Batch convert with multiple threads

Reasons to avoid

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Requires a desktop download

Spin 3D from NCH Software is one of the best desktop-based file converters around. But, it’s extremely fast and powerful and covers a wide range of conversion needs. 

This software takes inputs in any of 45 different file formats, including most common proprietary formats. The file types you can convert to are much more limited—there are only six of them—but Spin 3D includes outputs in 3DP and 3DX in addition to STL and OBJ formats. 

What really sets this 3D file converter apart are the features built into the desktop software. Before you run a conversion, you can preview both the original 3D design and the anticipated output design to make sure it will render accurately. On top of that, Spin 3D enables you to batch convert files using multiple processor threads.

(Image credit: Online CAD Converter)

3. Online CAD Converter

Supports most CAD, graphical, and neutral 3D file formats

Today's Best Deals

Reasons to buy

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Upload files up to 100 MB in size

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Supports a variety of CAD files

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Can handle batch conversions

Reasons to avoid

-

Fee for each conversion

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Fewer supported graphical inputs than other tools

If you’re willing to pay for file conversion, it’s worth taking a look at Online CAD Converter. This web-based conversion tool lets you convert one file for free, then charges a modest fee per file after that. Unlike other online tools, Online CAD Converter supports large files—you can upload files up to 100 MB in size.

The main reason to go with this 3D file converter over a free tool is that it supports an incredibly wide variety of file types. In addition to the graphical formats that most converters cover, Online CAD Converter can accept files from Inventor (SLDPRT), Inventor (IPT), Pro/ENGINEER (ASM), NX (PRT), and more. You can output designs in five standard formats including COLLADA, STL, 3DP, 3DS, and OBJ.

(Image credit: i3DConverter)

4. i3DConverter

Convert inputs in more than 760 file formats

Today's Best Deals

Reasons to buy

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Supports 760 file formats

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Batch conversion module

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Built-in file viewer

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Can be accessed from command line

Reasons to avoid

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Not free to use

If you want a single 3D file converter that can handle every file format under the sun, look no further than i3DConverter. This desktop software supports more than 760 file formats. Not all of those are supported for both input and output, but many are. That makes this file conversion software much more versatile than just about any other tool on the market. 

The software itself is also quite packed with features. i3DConverter has a batch input module for converting large numbers of 3D files, and you can load files into the software simply by dragging and dropping. There’s a built-in file viewer that lets you preview the input you’re converting, although you cannot see a preview of the output before the conversion takes place. In addition, you can access i3DConverter from the command line. 

As you might expect, i3DConverter isn’t free. But it is very reasonably priced, and the software is available for Windows, Mac, and Linux.

(Image credit: Greentoken)

5. Greentoken

A simple and free online 3D file converter

Today's Best Deals

Reasons to buy

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Free to use

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Upload up to five files at a time

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Wide variety of output formats

Reasons to avoid

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Doesn’t support 3DP outputs

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Limit of 50 MB for uploads

Greentoken offers an impressive range of file support for a free online tool. The platform can handle any of 52 3D file format inputs, including all of the most popular proprietary and neutral formats. What’s particularly nice about it is that it also supports a wider variety of outputs than other free tools. You can convert files to STL, STLB, COLLADA, OBJ, 3DS, PLY, JSON, and X. Notably, though, conversion to 3DP is not supported by Greentoken. 

The online interface does support batch conversion, but you can only upload a maximum of five files at a time. Helpfully, if your model is split into multiple files, the batch upload can be used to provide Greentoken with all the necessary files at once. Uploads and downloads are relatively speedy, although the limit of 50 MB for uploads can be problematic if you have large 3D files.

How we tested the best 3D file converter

To test for the best 3D file converter we first set up an account with the relevant software platform, whether as a download or as an online service. We then tested the service using a handful of files to see how the software could be used for converting different file formats. The aim was to push each software platform to see whether it could simply and easily not just convert a range of content types but also do so faithfully and consistently without introducing errors.

See how we test, rate, and review products on TechRadar.  

Which type of 3D file converter is best for you?

When deciding which of the best 3D file converter to download and use, first consider if a free or budget software program will suit you fine. However, if you plan to develop a 3D your converted file further using a series of complicated models using advanced tools and filters, it may be better to aim for one of the higher range and more expensive modelling programs on our list.

We've also featured the best AutoCAD to PDF converters.

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Michael Graw is a freelance journalist and photographer based in Bellingham, Washington. His interests span a wide range from business technology to finance to creative media, with a focus on new technology and emerging trends. Michael's work has been published in TechRadar, Tom's Guide, Business Insider, Fast Company, Salon, and Harvard Business Review. 

7 Best STL File Converters in 2023

Those, who regularly work with STL files, clearly understand the advantages of the best STL file converter. Such a program lets you turn SLT files into other 3D formats and vice versa.

Though STL format is a widely-accepted standard for 3D printing, rapid prototyping, and computer-assisted manufacturing, there are situations when you need to convert such files.

  1. Meshconvert - Supports 37 input file types
  2. Spin 3D - With file previews
  3. Online CAD Converter - Supports a variety of CAD files
  4. i3DConverter - 760 file formats
  5. Greentoken - Open source STL file converter
  6. CAD Exchanger - With product structure navigation
  7. SketchUp - Library of free 3D components

If you have also faced the necessity of re-formatting STL files but don’t know what programs can help you cope with conversion successfully, have closer look at this review. We have presented the top 5 converters (free included) that have extensive toolset and rich output options.

1. Meshconvert - Our Choice

Supports 37 input file types

  • Free to use
  • Polygon reduction
  • Textures are supported
  • Slow uploads for large 3D files

Meshconvert

DOWNLOAD

Verdict: Meshconvert is a software product designed to convert STL 3D models to a compatible CAD file format. To me, one of the best things about using this software is that I can convert my designs to a 3D model and then use free CAD software to do all of the necessary resizing and holes preparation before sending it to a manufacturing company.

The software makes the job of conversion pretty easy and will take no more than 20 minutes to complete.

2. Spin 3D

With file previews

  • Outputs to 3DP and 3DX
  • Converts 3D files within minutes
  • One-click file conversion
  • Requires a desktop download

Spin 3D

DOWNLOAD

Verdict: Spin 3D is a high quality and very easy to use software product that enables users to convert their CAD drawings into 3D models. This enables users to work with complex architectural or geometrical shapes and design, while saving both time and money on production.

This is because designing complicated 3D models usually involves creating a large number of complicated joints and complicated geometry with the help of 3D modeling software and it would not be possible for a person to convert these into a file format used in ordinary computers without the help of Spin 3D.

3. Online CAD Converter

Supports a variety of CAD files

  • Fast, efficient conversion
  • Powerful batch conversion features
  • Easy to use
  • Fee for each conversion

Online CAD Converter

DOWNLOAD

Verdict: Online CAD converter is a tool that use the OLE format to convert files from any file format such as Microsoft Office, Corel Draw, and Paint Shop Pro into a CAD file.

OLE (OEM) files are those files which came from applications which are manufactured by a company or are associated with an application. These are the files which are utilized in online business plans, product development, advertising, interactive learning, teleconferencing etc.

4. i3DConverter

760 file formats

  • Automatic file format recognition
  • Command line conversion
  • Fast import and export process
  • Built-in file viewer
  • Not free to use

i3DConverter

DOWNLOAD

Verdict: i3DConverter is one of the best tool to convert your original 3D models into the STL files. The tool enables you to convert three dimensional models from any software such as Slic3r, Zbrush or Paint Shop Pro. This software also has a feature that allows you to edit and save the different file formats used by your 3D model like 3D printing software.

With i3DConverterStl you can easily convert your model into a digital asset like an image or an animation with just a few clicks.

5.

Greentoken

Open source STL file converter

  • Fast online use
  • No download or sign-up required
  • Upload up to five files at a time
  • Limit of 50 MB for uploads

Greentoken

DOWNLOAD

Verdict: If you are looking to save time when it comes to working on CAD files, then you should be checking out Greentoken converter. This tool has been designed to allow you to convert CAD drawings into the popular 3D designs that you see commonly used in most of the popular CAD packages today.

Greentoken has an intuitive interface that allows you to easily manipulate your CAD files into the desired format. It also includes a feature that allows you to easily change the perspective, colors, and textures without having to redraw everything from scratch.

6. CAD Exchanger

With product structure navigation

  • Sectioning, explode views modes
  • Revamped UI design
  • Flexible view capabilities
  • Display measurement information
  • No support for big files

CAD Exchanger

DOWNLOAD

Verdict: CAD Exchanger is a simple and easy to use CAD package that allows users to convert file formats into a variety of popular graphic formats. It is able to read and write most CAD drawings and it has an in-built scanner to allow users to easily extract text from their drawings.

One of the benefits of using this CAD utility is that it allows users to edit text as well as rotate, flip and shrink images while converting the file format into a different format.

7. SketchUp

Library of free 3D components

  • Easy to change details
  • Speedy modeling
  • Quick and basic
  • Not easy to do dimension

SketchUp

DOWNLOAD

Verdict: SketchUp is a software program that converts STL files into various other file formats. This file converter have been developed by professional users who have tested them extensively on different operating systems. It comes with a user interface that is extremely easy to learn and is very efficient in converting STL files into a compatible format.

SketchUp also allows users to shape, resize and create any 3D models with the help of built-in features.

Convert any 3D format online

Convert 3D file to Autodesk, Draco, Wavefront, 3D Studio and many other formats.

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Python Java C#

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A conversion application is used to convert 3D files to another format. You don't need to install special 3D document conversion software, just open this app with your web browser, drag your document to the upload area and click the convert button, your document will open in the browser no matter you use Windows, Linux, MacOS, Android or even a mobile device. If you want to convert 3D files programmatically, check out the Aspose.3D document.

Aspose.3D Conversion

  • Supported documents: 3ds, 3mf, amf, ase, dae, dxf, drc, fbx, gltf, glb, jt, obj, ply, pdf, rvm, stl, u3d, vrml, x, ma, usd, usdz
  • Save as: 3ds, amf, rvm, gltf, glb, pdf, html, drc, dae, fbx, obj, stl, u3d, ply, usd, usdz, docx, xlsx, pptx

Popular converters: FBX to OBJ from STL to OBJ from OBJ to STL GLTF to GLB FBX to GLB OBJ to GLB OBJ to 3DS from GLTF to USDZ FBX to USDZ DAE to OBJ FBX to STL

How to convert a file using Aspose. 3D Converter
  • Click inside the file drop area to upload a file, or drag and drop a file.
  • Your file will be downloaded and converted to the correct format.
  • A link to download the file will be available immediately after the conversion.
  • You can also send a link to the file to your email address.
  • Please note that the file will be deleted from our servers after 24 hours and the download links will stop working after this period of time.

  • 1

    ❓ How to convert a 3D file?

    First, you need to add a file to convert: drag and drop the 3D file or click inside the white area to select the file. Then click the "Convert" button. When the 3D conversion is completed, you can download the result file.

  • 2

    ⏱️ How long does it take to convert 3D?

    This converter is fast. You can convert a 3D file in a few seconds.

  • 3

    🛡 Is it safe to convert 3D file with free converter?

    Certainly! The link for downloading the result files will be available immediately after the conversion. We delete downloaded files after 24 hours and download links stop working after this period of time. Nobody has access to your files. File conversion is absolutely safe.

  • 4

    💻 Can I convert a 3D file on Linux, Mac OS or Android?

    Yes, you can use the free Converter app on any operating system with a web browser. Our 3D converter works online and does not require any software installation.

Other supported conversions

You can also convert to many other file formats. Please see the full list below.

  • FBX to OBJ (OBJ file format)
  • STL to OBJ (OBJ file format)
  • OBJ to STL (Stereolithography)
  • GLTF to GLB (GlTF Binary)
  • FBX to GLB (GlTF Binary)
  • OBJ to GLB (GlTF Binary File)
  • OBJ to 3DS (3D Studio Mesh File Format)
  • from GLTF to USDZ (Universal Scene Description Zip archive)
  • FBX to USDZ (Universal Scene Description Zip archive)
  • DAE to OBJ (OBJ file format)
  • FBX to STL (Stereolithography)

online OBJ to STL converter free

Convert OBJ to STL and many other formats.

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Drag or drop your file

Enter URL

*By uploading your files or using our service, you agree to our Terms of Use and Privacy Policy.

Save as

Python Java C#

See source code in

OBJ to STL conversion application is used to convert OBJ files to STL format. You don't need to install special software to convert OBJ format to STL format, just open this application with your web browser, drag the document to the download area and click the browse button, your document will open in the browser whether you are using Windows, Linux , MacOS, Android, or even a mobile device. If you want to convert OBJ to STL programmatically, check out the Aspose.3D doc.

Aspose.3D Conversion

  • Supported documents: 3ds, 3mf, amf, ase, dae, dxf, drc, fbx, gltf, glb, jt, obj, ply, pdf, rvm, stl, u3d, vrml, x, ma, usd, usdz
  • Save as: 3ds, amf, rvm, gltf, glb, pdf, html, drc, dae, fbx, obj, stl, u3d, ply, usd, usdz, docx, xlsx, pptx

Popular converters: FBX to OBJ from STL to OBJ from OBJ to STL GLTF to GLB FBX to GLB OBJ to GLB OBJ to 3DS from GLTF to USDZ FBX to USDZ DAE to OBJ FBX to STL

OBJ OBJ file format

OBJ files are used by the Advanced Visualizer Wavefront application to define and store geometric objects. The reverse and forward transfer of geometric data is possible via OBJ files. The OBJ format supports both polygonal geometry such as points, lines, texture vertices, edges, and freeform geometry (curves and surfaces). This format does not support animation or information related to lighting and scene positions.

Read more

STL Stereolithography

STL, short for Stereolithography, is an interchangeable file format representing 3D surface geometry. The file format finds its way into several areas such as rapid prototyping, 3D printing, and computer-aided manufacturing. It represents a surface as a series of small triangles known as faces, where each face is described by a perpendicular direction and three points representing the vertices of the triangle.

Read more

How to convert a file using Aspose.3D Converter
  • Click inside the file drop area to upload a file, or drag and drop a file.
  • Your file will be downloaded and converted to the correct format.
  • A link to download the file will be available immediately after the conversion.
  • You can also send a link to the file to your email address.
  • Please note that the file will be deleted from our servers after 24 hours and the download links will stop working after this period of time.

  • 1

    ❓ How to convert OBJ to STL file?

    First, you need to add a file to convert: drag and drop the OBJ file or click inside the white area to select the file. Then click the "Convert" button. When the OBJ to STL conversion is completed, you can download the result file.

  • 2

    ⏱️ How long does it take to convert OBJ to STL?

    This converter is fast. You can convert OBJ to STL file in few seconds.

  • 3

    🛡 Is it safe to convert OBJ to STL with a free converter?

    Certainly! The link for downloading the result files will be available immediately after the conversion. We delete downloaded files after 24 hours and download links stop working after this period of time. Nobody has access to your files. File conversion is absolutely safe.

  • 4

    💻 Can I convert OBJ to STL on Linux, Mac OS or Android?

    Yes, you can use the free Converter app on any operating system with a web browser. Our OBJ to STL converter works online and does not require any software installation.

Quick and easy conversion

Load the document, select the save format type and click the Convert button. You will receive a download link once the file has been converted.

Learn more