Convert OBJ to STL

By using our efficient and user-friendly OBJ to STL converter, you can save yourself from the tiresome process of manually converting numerous .obj files into stl format for hours.

reaConverter is an offline software program used to convert files between different file formats and perform image editing. With reaConverter you can easily convert OBJ files to STL format.

Download
reaConverter
Convert
OBJ to STL
Online
OBJSTL

How to Convert Multiple OBJ Files to STL?

1. Download and Install reaConverter

reaConverter is quick to download, install and launch. This standalone software is extremely efficient in managing a wide range of batch conversions. reaConverter is incredibly powerful and boasts an extensive variety of features.

reaConverter logo
Install reaConverter

2. Load your OBJ files

Start reaConverter and load all the .obj files you intend to convert into .stl. The software supports multiple OBJ conversion and processes all files locally on your computer.

Select OBJs from a folder or by drag-and-dropping them directly into the reaConverter window.

Load your OBJ files into reaConverter

3. Select STL as output format

Pick the STL as output format and choose the destination folder where you want to save new .stl files.

Select STL as output format

4. Start OBJ to STL conversion

Then simply press Convert button and your conversion will begin in no time!

Screenshot

Once the conversion is complete, you can find your STL files in the destination folder you selected.

OBJ to STL Converter

reaConverter offers the fastest, simplest solution for converting your OBJ files into STL in seconds - all files processed on your PC for maximum privacy and speed.

Download Free Trial

Do more with your files

Converting OBJ files for use in a workflow? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features
Image editing

User Reviews

Average User Rating:
Last updated on June 16, 2025
"5/5⭐ Finally! Does what it promises - converts AND tweaks images without complicated menus. Perfect for quick jobs."
J. Mitchell
⭐⭐⭐⭐⭐
J. Mitchell
Satisfied Customer
"reaConverter is pure gold! Rock-solid performance with zero crashes. No internet needed—perfect for travel or low-connectivity work. The ultimate offline alternative to sketchy web converters. Plus, the desktop version keeps sensitive files secure since nothing ever gets uploaded to the cloud."
Malik T. Martin
⭐⭐⭐⭐⭐
Malik T. Martin
Satisfied Customer
"I was skeptical at first, but reaConverter exceeded my expectations. The interface is intuitive, and the advanced settings let me tweak outputs perfectly. Plus, the customer support is fantastic!"
Sarah Lane
⭐⭐⭐⭐⭐
Sarah Lane
Satisfied Customer
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
⭐⭐⭐⭐⭐
Elena Anderson
Happy User
"Enable shell integration for lightning-fast file conversions directly from Windows Explorer."
R. Lewis
⭐⭐⭐⭐⭐
R. Lewis
Happy User
"After 200+ conversions on my budget laptop (i3-1115G4/4GB RAM/Win11), reaConverter outperforms heavyweight tools. Zero crashes, low CPU usage during batch processing, and no internet dependency - exactly what professionals need."
Walter Morgan
⭐⭐⭐⭐⭐
Walter Morgan
Satisfied Customer

OBJ to STL Conversion: FAQ

What are OBJ files?

OBJ is a 3D model format associated with Advanced Visualizer, a software suite developed by Wavefront Technologies. OBJ files contain geometry definitions of 3D models, including coordinates for each angular point, UV mapping data, texture information and details describing the faces of each polygon. Due to its frequent use, the OBJ format has been borrowed by other 3D graphics applications as well, and is currently seen as an industry standard.

What are STL files?

STL is the proprietary format for a computer-aided design (CAD) program developed by 3D Systems. STL is an acronym for Stereolitography, which is a type of technology used for creating prototypes or patterns through 3D printing. An STL file contains a surface representation of such a model, without detailed specifications of aspects such as colours. STL files can only be opened with a limited number of programs.

Can reaConverter convert OBJ to STL?

Yes! reaConverter instantly converts .obj to .stl with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert OBJ to STL online?

If you only need to convert a few OBJ files to STL format, feel free to try our free online free online OBJ to STL converter — perfect for small batches with no installation needed!

How can I turn OBJ files into STL on my computer?

The best way to change OBJs to STLs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from OBJ to STL.

How can I automate OBJ to STL files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert OBJ files to STL using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line obj to stl converter for batch processing.

What else can I do with reaConverter?

Copy metadata (EXIF, IPTC)Convert GIS filesChange format settingsChange DPIConvert RAW photos

Find out more

Get advanced software for file conversion, processing, and editing, giving you complete, precise control over your work.
Download
reaConverter
Buy Now
reaConverter software