# JPEG XL Toolbox — ProRAW Compressor

> Image converter for JPEG XL (JXL) with ProRAW and batch support. (iPhone/iPad app by SUIKA LTD.)

- Source: https://appshunter.io/ios/app/jpeg-xl-toolbox/id6470681357 (this page in markdown: same URL + `.md`)
- Developer: [SUIKA LTD](https://appshunter.io/developer/1597116502)
- Category: Photo & Video, Utilities
- Price: Free with in-app purchases
- Rating: 4.75/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 5 MB
- Languages: English, German, Japanese, Korean, Russian, Chinese, Spanish, Chinese
- Released: 2024-01-13
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/jpeg-xl-toolbox/id6470681357/reviews.md

## What is JPEG XL Toolbox?

This application offers various JPEG XL (JXL) functionalities.

Supports:
* ProRAW DNG -> DNG
    - Lossless compression, about 1/2 of the original size
    - Lossy compression, about 1/6 of the original size

* ProRAW DNG -> JXL
    - Lossy conversion, about 1/7 of the original size

* DNG -> JXL
    - Lossy conversion, about 1/7 of the original size

* HEIF -> JXL
    - Lossy conversion

* JPEG -> JXL
    - Lossless conversion

Features:
* Keeps the internal metadata
* Preserves 16-bit depth
* Preserves HDR display effects in iOS Photos App
* Batch conversion capabilities


=== CHNAGELOG ===
### version 0.3.2
* Bumps libjxl to v0.10.2
* Adjusts settings view

### version 0.3.1
* Improves processing speed significantly
* Adds lossless mode for ProRAW compression
* Uses 7 as the default effort

### version 0.3.0
* Adds ProRAW direct compression

### version 0.2.1
* Settings page adjustment
* Some UI improvements

### version 0.2.0
* Adds Pro version purchase
* Adds several ProRAW parameters in settings for Pro version
* Adds decoding speed in settings
* Low memory mode now allows devices with 4GB RAM to convert 48M ProRAW

### version 0.1.2
* Uses lossless encoding for JPEG automatically
* Adds Modular mode support
* Adds Progressive mode support
* Adds Colorspace support
* Keeps HDR effect when converting from ProRAW

### version 0.1.1
* Adds support for ProRAW to lossy JPEG XL conversion
* Adds Batch conversion
* Keeps DNG Metadata in JXL
* Adds quality and effort in settings

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| JPEG XL Toolbox Pro | $4.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/jpeg-xl-toolbox/id6470681357/reviews.md

### 4/5 — Good, but seriously update the app more often

*2024-12-16*

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.

### 5/5 — Thank you

*2024-09-18*

You should change some coffee $$

## Frequently asked questions about JPEG XL Toolbox

### 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.

## Version history (last 5 releases)

### 0.3.3 — 2025-07-01

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

### 0.3.2 — 2024-03-23

* Bumps libjxl to v0.10.2
* Adjusts settings view

### 0.3.1 — 2024-03-09

* Improves processing speed significantly
* Adds lossless mode for ProRAW compression

### 0.3.0 — 2024-02-28

Direct compression of ProRAW images
  - Compresses down to 1/6 of the original size with visual lossless quality, even in post processing
  - Keeps all the internal metadata
  - Preserves 16-bit depth
  - Preserves HDR display effects found in iOS photos

### 0.2.1 — 2024-01-13

No release notes.

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## More apps by SUIKA LTD

- [Camac](https://appshunter.io/ios/app/camac/id6670243455)

All apps by SUIKA LTD: https://appshunter.io/developer/1597116502

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*