HDR Ultra | Convert Any Image to True HDR High Dynamic Range Format
HDR Ultra is a professional HDR converter and SDR to HDR AI generation tool. We support intelligent, ultra-fast, lossless conversion of 300+ image formats including JPEG, PNG, HEIC to high dynamic range formats like Ultra HDR, HDR HEIC, HDR AVIF.
Drag & Drop your photos here, or Click to Select
Supports JPEG, PNG, HEIC, RAW, AVIF, JXL, etc.
Say Goodbye to Flatness, Embrace Real Light
Drag the slider to witness how our AI engine illuminates shadows and restores highlights.
Three Core Engines, Unleash Your Image's Full Potential
AI Creator Engine: Giving Photos a Second Life
Our core competency. Based on deep learning models, our AI not only seamlessly elevates SDR images to Ultra HDR, but also intelligently analyzes image content and precisely generates Gain Maps to reconstruct light and shadow. Whether you want to recapture the glow of sunset or illuminate stars in the night sky, it's all achievable with one click, with results comparable to professional post-processing.
Universal Converter Engine: Breaking All Format Barriers
One tool, solving all compatibility issues. We support arbitrary format conversion from mainstream HEIC to professional RAW, from highly compressed AVIF to next-generation JXL. Whether you need HDR to SDR tone mapping or lossless conversion between SDR formats, we can complete it quickly and accurately - your best assistant for cross-platform, cross-ecosystem content sharing.
Precision Preview Engine: WYSIWYG Confidence
No more guessing. Our online HDR viewer can realistically simulate the final effect of images on HDR-capable screens in your browser, including Gain Map visualization. Before downloading or sharing, you can precisely check every light and shadow detail to ensure your work is presented in the most perfect way that matches your expectations.
Understand Next-Gen Imaging Technology in 3 Minutes
HDR: Closer to Reality as the Eye Sees It
Traditional SDR photos lose detail in overly bright or dark areas, like viewing the world through a murky pane of glass. High Dynamic Range (HDR) images, however, can simultaneously preserve rich detail in these areas, infinitely approaching that vivid, colorful real world with vibrant light and shadow that our eyes see.
Ultra HDR: The Intelligent Next-Gen Standard
As the next-generation HDR standard led by Google, Ultra HDR's revolutionary aspect is that it 'hides' the Gain Map directly inside a regular JPEG file. This means the same photo can display stunning HDR effects on supported devices, while gracefully degrading to a high-quality SDR photo on older devices. One file, two perfect experiences.
Us: A Bridge Connecting Fragmented HDR Ecosystems
Currently, Apple, Google, Samsung and other platforms each have their own HDR ecosystems with incompatible formats, making it so your HDR photos taken on an iPhone may not display properly on other platforms. Our tool was born to solve this pain point. As a professional HDR format conversion and AI enhancement platform, we build a bridge for you to truly achieve 'create once, shine everywhere'.
Industry-Leading Format Support Matrix
| Source \ Target | SDR JPEG | SDR PNG | SDR HEIC | Ultra HDR | HDR HEIC | HDR AVIF | HDR JXL | RAW |
|---|---|---|---|---|---|---|---|---|
| SDR JPEG | ||||||||
| SDR PNG | ||||||||
| SDR HEIC | ||||||||
| Ultra HDR | ||||||||
| HDR HEIC | ||||||||
| HDR AVIF | ||||||||
| HDR JXL | ||||||||
| RAW |
Still Have Questions?
We understand that in the world of image processing, compatibility is everything. Whether it's RAW files in photographers' hands, HDR HEIC from the Apple ecosystem, Ultra HDR from the Android camp, or cutting-edge AVIF and JXL, we provide comprehensive, seamless conversion and creation support. The format support matrix below details all the paths we support. We are committed to being your only, ultimate image format solution.
To experience stunning HDR effects, you need an HDR-capable display such as newer high-end smartphones (iPhone 12+, Pixel 7+), OLED TVs, or professional HDR monitors. On regular screens, it will display as a high-quality SDR photo.
Think of it as a 'highlight map' that guides the display. It tells the screen which areas of the photo need extra brightness and by how much. The beauty of Ultra HDR is that it packages this 'map' together with a regular SDR photo.
Yes, our product features are currently completely free for all users. In the future, we may offer premium subscription plans for professional users with higher demands such as online processing and API calls, but we promise that basic features will always remain free and open to individual users.
Absolutely not! We are a pure web tool. On any operating system (Windows, macOS, iOS, Android, etc.), simply open your browser to use all features.