Gain Map HDR

Gain Map HDR is a macOS-native tool that converts standard SDR images into true HDR using advanced gain map technology. Instead of relying on global tone mapping, it creates a per-pixel grayscale luminance map that expands dynamic range precisely, producing authentic HDR (HEIC) output in the Display P3 color space.

With support for over 20 image formats — including JPG, PNG, HEIC, TIFF, AVIF, WEBP, and professional RAW files like DNG, NEF, CR3, and ARW — the app fits easily into professional and creative workflows.

Key features include:
	- Three HDR modes – HDR (standard), HDR+ (enhanced highlights), and HLG (broadcast standard)
	- Batch processing – Convert multiple images simultaneously
	- 4:5 crop mode – Ideal for social media sharing
	- Watermark tool – Brand your HDR content with your own logo
	- HEIF output with gain maps – Embedded gain maps for display-aware rendering
	- Drag & drop interface – Simple and intuitive image selection
	- Display optimization – True HDR on compatible displays, but visually improved even on SDR screens

The HLG (Hybrid Log-Gamma) mode follows the broadcast standard, offering scene-referred HDR that maintains compatibility with both HDR and SDR displays — perfect for professional broadcast content and cross-platform delivery.

Whether you're a photographer enhancing a gallery, a content creator preparing visuals for HDR-capable devices, a broadcaster needing HLG-compliant content, or just want your images to pop with realistic highlights and shadows, Gain Map HDR provides the tools and precision to make it happen — effortlessly.