Convert J2K to PNG

J2K to PNG converter that respects your privacy. No cloud uploads, no file size limits — just fast offline batch processing.

Online converters too slow for your J2K files? reaConverter works locally and handles unlimited batches. All processing runs locally on your PC, so your files stay private and secure.

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 also includes editing tools: resize, crop, rotate, and more.

Install reaConverter

2. Load your J2K files

Add J2K files to reaConverter. One file or a thousand, the process is the same. Everything runs locally on your machine.

You can drag-and-drop files, browse to a folder, or add entire directory trees including subfolders.

3. Select PNG as output format

Select PNG from the output format list and set your destination folder. You can also adjust quality and compression settings.

4. Start J2K to PNG conversion

Click the Convert button to start. reaConverter will process all your files with the settings you selected.

When finished, your new .png files will be waiting in the destination folder.

J2K to PNG Converter

reaConverter offers the fastest, simplest solution for converting your J2K files into PNG in seconds - all images processed on your PC for maximum privacy and speed.

Download Free Trial

Do more with your images

Converting J2K images for use in a larger project? With reaConverter, you can convert, edit, and enhance your images in one streamlined process.

Our range of editing options includes such image processing actions as Resize, Rotate, Crop, Color Replace, Watermarks and more. Adjust actions include RGB, HLS, HSV, Brightness and Contrast. Auto-processing options are also available, such as auto-rotate and auto-crop.

Image editing tools

User Reviews

Average User Rating:
Last updated on January 25, 2026

"For professional-grade PNG to WebP conversions, avoid online tools with restrictive quotas. reaConverter delivers batch processing at local disk speeds – the only viable option for frequent use."

Matthew Hernandez

Satisfied Customer

"I design stickers but could never cleanly resize my PNG logos without pixelation. reaConverter’s PNG-to-SVG tool keeps everything sharp—even when scaling up. My Etsy shop looks way more professional now!"

Lisa Palmer

Digital Artist

"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

Happy User

"Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!"

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

Happy User

"We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works."

David R.

IT Solutions Architect

J2K to PNG Conversion: FAQ

Can reaConverter convert J2K to PNG?

Yes! reaConverter instantly converts .j2k to .png 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.

What is reaConverter used for?

reaConverter is a software program used for converting images and other types of files from one format to another. It supports a wide range of file formats and allows users to convert multiple files at once, making it a valuable tool for graphic designers, photographers, and other professionals who work with digital images. reaConverter also includes features for resizing, cropping, and editing images, along with batch processing capabilities that help automate repetitive tasks.

Can I convert J2K to PNG online?

If you only need to convert a few J2K files to PNG format, feel free to try our free online free online J2K to PNG converter — perfect for small batches with no installation needed!

How can I turn J2K files into PNG on my computer?

The best way to change J2Ks to PNGs 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 J2K to PNG.

How can I automate J2K to PNG 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 J2K files to PNG using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line j2k to png converter for batch processing.

What else can I do with reaConverter?

Change format settings Change DPI Convert RAW photos Copy metadata (EXIF, IPTC)Convert vector files