JPEG XL Toolbox

JPEG XL Toolbox

ProRAW Compressor

4 ratings
2 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 13, 2024
  • July 1, 2025

Features

JPEG XL Toolbox screenshot #1 for iPhone
JPEG XL Toolbox screenshot #2 for iPhone
JPEG XL Toolbox screenshot #3 for iPhone
iphone
ipad
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About

This app converts various image formats, including ProRAW DNG, HEIF, and JPEG, to JPEG XL (JXL). It offers lossless and lossy compression options, preserves metadata and 16-bit depth, and supports batch conversions. The app also maintains HDR display effects.

ProRAW DNG to JXL conversion
Lossless and lossy compression
Metadata and 16-bit depth preservation
HDR display effect support
Batch conversion
HEIF and JPEG to JXL conversion
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What's New in JPEG XL Toolbox

0.3.3

July 1, 2025

- update libjxl to v0.11.1 - add JPEG resample option in the settings

1

In-App Purchases

$4.99

JPEG XL Toolbox Pro

Pro version of JPEG XL Toolbox

User reviews

Good, but seriously update the app more often

I wanna like this app, but system mishandling is seriously preventing it. Seriously, libjxl got updated 2 months ago. It’s been 8 months since the last update. There’s also no clarity on how some of the features work. I like the fact I can have modular or progressive besides VARDCT default - but I shouldn’t need to search up everything in obscure articles to find out what they do. It’s user friendly for what you can do, it’s unintuitively hostile for people who don’t. Nevermind how buggy the app feels. There’s so many quirks to running the app that you really have to treat the app like that TV remote that works after you hit it a few times.
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Thank you

You should change some coffee $$

Developer apps

FAQ

What image formats can JPEG XL Toolbox convert?

JPEG XL Toolbox supports converting ProRAW DNG, HEIF, and JPEG files to JPEG XL (JXL). It can also convert ProRAW DNG to DNG with compression.

Does JPEG XL Toolbox support lossless compression?

Yes, JPEG XL Toolbox offers lossless compression for ProRAW DNG to DNG conversions, reducing file size by approximately half. It also supports lossless conversion from JPEG to JXL.

How much can JPEG XL Toolbox compress images?

Lossy compression for ProRAW DNG to JXL can reduce file size to about 1/7th of the original. Lossy compression for ProRAW DNG to DNG achieves about 1/6th of the original size.

Does JPEG XL Toolbox preserve image metadata?

Yes, the application is designed to keep internal metadata intact during conversions. It also preserves 16-bit depth and HDR display effects in the iOS Photos App.

Can I convert multiple images at once with JPEG XL Toolbox?

Yes, JPEG XL Toolbox features batch conversion capabilities, allowing you to process multiple images simultaneously for increased efficiency.

Is JPEG XL Toolbox available on Android?

Based on the provided data, JPEG XL Toolbox is supported on iPhone and iPad. Information regarding Android availability is not specified.

How often is JPEG XL Toolbox updated?

The latest version, 0.3.3, was released on 2025-07-01, indicating recent development activity. Previous updates have focused on improving processing speed and adding new compression modes.

Does JPEG XL Toolbox have ads?

No, JPEG XL Toolbox does not contain advertisements. The app is free to use and does not display any in-app ads.