Convert PRJ to QOI

Convert PRJ 3D models to QOI without expensive CAD software. reaConverter handles batch conversion offline with consistent output.

Batch PRJ to QOI conversion doesn't have to be complicated. reaConverter processes entire folders with consistent quality settings. Works offline with no internet required — convert anywhere, anytime. Export 3D models to compatible formats for easy sharing.

Download
reaConverter
Convert
PRJ to QOI
Online
PRJQOI

How to Convert Multiple PRJ Files to QOI?

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.

reaConverter logo
Install reaConverter

2. Load your PRJ files

Load your PRJ files into reaConverter. You can add individual files or point to folders, and the software will queue everything automatically.

Select PRJs from a folder or drag-and-drop them directly into the reaConverter window.

Load your PRJ files into reaConverter

3. Select QOI as output format

Choose QOI for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.

Select QOI as output format

4. Start PRJ to QOI conversion

Press the Convert button and reaConverter takes care of the rest. Processing time depends on file size and volume.

Start Conversion

After processing, find all your new .qoi files in the output location. The log shows details for each conversion.

PRJ to QOI Converter

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

Download Free Trial

Do more with your files

Converting PRJ 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 January 25, 2026
"This software just works! My old laptop can’t handle Photoshop, but reaConverter flies through conversions without breaking a sweat. Wi-Fi gone? Still strong!"
Robert Williams
Robert Williams
Happy User
"Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!"
Henry R.
Henry R.
Happy User
"For cross-platform compatibility, JPEG remains the gold standard. reaConverter’s precision conversions ensure perfect results every time, whether for presentations, websites, or client deliverables."
Paul Baker
Paul Baker
Happy User
"An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!"
Logan B.
Logan B.
Satisfied Customer
"I use the online converter — it’s quick and hassle-free!"
Jian Wong
Jian Wong
Happy Online User
"Working in a print studio means constantly juggling obscure file formats. I used to waste hours Googling converters or installing random software — until reaConverter became my Swiss Army knife. Install it once, and you're set forever. No internet? No problem!"
Helen Evans
Helen Evans
Satisfied Customer

PRJ to QOI Conversion: FAQ

What are PRJ files?

The PRJ extension is attached to project files created with 3D Studio, the predecessor of 3ds Max, created for operation on the DOS platform. PRJ is also known as a mesh file, containing graphical data related to geometry, texture, lighting and other relevant info associated to a 3D model.

What are QOI files?

QOIQOI (Quite OK Image) is a fast, lossless image format designed as a simpler alternative to PNG. It offers similar compression quality but with much faster encoding/decoding speeds, making it ideal for applications where performance matters.

Can reaConverter convert PRJ to QOI?

Yes! reaConverter instantly converts .prj to .qoi 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 PRJ to QOI online?

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

How can I turn PRJ files into QOI on my computer?

The best way to change PRJs to QOIs 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 PRJ to QOI.

How can I automate PRJ to QOI 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 PRJ files to QOI using the command prompt?

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

What else can I do with reaConverter?

Change format settingsChange DPIConvert DICOM filesChange photo sizeSet manual file date

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