HDR Transformer
HDR Simulation & Conversion
$9.99 · Designed for iPad. Not verified for macOS.
HDR Converter is a derivative product of the Prismatik app, designed to create a professional, easy-to-use, clean, and aesthetically pleasing HDR simulation and conversion tool.
HDR Converter provides professional-grade HDR processing tools—from the brilliant transformation of SDR to HDR, to seamless conversion between multiple HDR formats—all completed offline on your device with 100% privacy protection. It is also optimized for Xiaohongshu (RedNote), making your posts stand out.
Core Features
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HDR Simulation — Breathe New Life into Every Image
Whether it's digital photography, classic artwork, or AI-generated content, HDR Simulation infuses images with realistic brightness and tonal depth. Built on Apple's official HDR Gain Map pipeline with targeted optimizations, it ensures every exported HDR photo has accurate luminance mapping and full metadata support.
Smart Algorithm, One-Tap Simulation: Default parameters are automatically calculated based on in-depth image analysis, preserving natural light relationships while enhancing depth, luster, and spatial presence.
Professional Manual Controls: Three core parameters—Highlight Boost, Highlight Range, and Peak Headroom—are provided, adhering to professional photography standards to reshape light with precision, not brute-force brightening.
Platform-Specific Optimization: Tailored for Xiaohongshu (RedNote) and Instagram, ensuring your HDR work retains its stunning visual impact after upload.
Efficient Batch Processing: Supports multi-task queue management, allowing you to add photos at any time and export individually or in batches.
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HDR Conversion — Break Down Format Barriers
Say goodbye to HDR format incompatibility. HDR Converter fully supports bidirectional conversion across all major HDR standards.
Supported formats include:
Apple HDR (HEIF / JPEG): Perfectly compatible with the Apple ecosystem.
Apple HDR (Compatible/HEIF): Optimized specifically for platforms like Xiaohongshu (RedNote), solving the issue of HDR loss after upload.
ISO Gain Map (HEIF): A universal mapping standard compliant with international specifications.
ISO HDR (PQ / HLG): Covers both broadcast-grade and consumer HDR standards—for example, .hif (HLG) files from Nikon Z cameras can be converted to Apple HDR (Compatible/HEIF) and shared directly to Xiaohongshu.
All conversion processes preserve original metadata and support both Display P3 and sRGB color gamuts, meeting every need from professional review to social sharing.
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Privacy & Security
We adhere to a strict "data localization" policy. All image processing is completed offline on your device—no uploads of any kind, no tracking components. Your work stays yours.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added a new photo import method: from Files.
Improved HDR conversion support for TIFF-format HDR photos.
Optimized the UI and animation feedback on the HDR conversion page.
Enhanced performance and stability, especially for multitasking and exporting.
Now supports Nikon high-efficiency RAW files (system version needs to be updated to 26.4 or later).
Other bug fixes.
The developer, 栋 张, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 栋 张
- Size
- 63.7 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 2 more
- English, German, Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Dong Zhang
