Convert ST4 to JP2

Stop converting ST4 files one by one. reaConverter processes entire folders to JP2 automatically — just drag, drop, and click Convert.

Got a folder full of ST4 files? reaConverter batch converts them to JP2 in minutes, not hours. Local processing means instant results, even with thousands of files.

Download
reaConverter
Convert
ST4 to JP2
Online
Convert

How to Convert Multiple ST4 Files to JP2?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting ST4 files in under two minutes.

reaConverter logo
Install reaConverter

2. Load your ST4 files

Start reaConverter and add your .st4 files. The software processes everything locally, so your files never leave your computer.

Use drag-and-drop, folder browser, or right-click conversion from Explorer.

Load your ST4 files into reaConverter

3. Select JP2 as output format

Select JP2 from 700+ supported output formats. Choose your destination folder and adjust settings to match your needs.

Select JP2 as output format

4. Start ST4 to JP2 conversion

Click Convert to start the batch. reaConverter processes files quickly and shows you the status of each one.

Start Conversion

Once done, reaConverter shows a summary. Click 'Show converted files' to jump straight to your JP2 output.

ST4 to JP2 Converter

reaConverter offers the fastest, simplest solution for converting your ST4 files into JP2 in seconds - all files processed on your PC for maximum privacy and speed.

Download Free Trial

Do more with your files

Converting ST4 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 24, 2026
"Finally an app that actually opens my weird files! Saves me from format frustration daily."
Kyle Brooks
Kyle Brooks
Happy User
"This converter delivers exceptionally quick format conversions with reliable results every time."
Brian White
Brian White
Happy User
"Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch."
Marcus White
Marcus White
Healthcare IT
"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

ST4 to JP2 Conversion: FAQ

What are ST4 files?

An ST4 file represents a RAW image taken with an SBIG CCD camera. SBIG is a producer of astronomical instruments and ST4s most likely contain images related to some type of scientific or industrial application. They are considered rare and are probably difficult to open using regular image viewers.

What are JP2 files?

JP2 or JPEG 2000 is an improved version of JPEG, one of the most popular file formats for storing and transferring images. Compared to the latter, JP2 image files offer higher quality and smaller size images by using a different compression algorithm, which can be either lossy or lossless. JP2s are created using the JPEG2000 Core Coding application, but can also be obtained through conversion from other formats.

Can reaConverter convert ST4 to JP2?

Yes! reaConverter instantly converts .st4 to .jp2 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 ST4 to JP2 online?

If you only need to convert a few ST4 files to JP2 format, feel free to try our free online free online ST4 to JP2 converter — perfect for small batches with no installation needed!

How can I turn ST4 files into JP2 on my computer?

The best way to change ST4s to JP2s 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 ST4 to JP2.

How can I automate ST4 to JP2 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 ST4 files to JP2 using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line st4 to jp2 converter for batch processing.

What else can I do with reaConverter?

Convert vector filesConvert picture color spaceChange format settingsChange image DPICopy IPTC data

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