How to Convert HEIC to HDR

Radiance HDR (.hdr) was the original standard for high dynamic range image storage, created in 1991, and remains in use today by architectural lighting tools, some game engines, and Photoshop's HDR editing features. HEIC's own HDR capabilities work differently, relying on gain map metadata that tells supporting displays how to render the same image brighter on HDR screens versus standard ones — a dual-display approach that doesn't map directly onto Radiance HDR's simpler, single dynamic range structure.

Converting HEIC to HDR is useful when a specific lighting, rendering, or visualization tool expects a .hdr file as input, with the conversion reflecting the photo's standard decoded color data rather than carrying over HEIC's gain map HDR rendering instructions.

1. Install Turbo Batch Image Converter Pro on your Windows PC.
2. Open the app and select Batch Mode for multiple files, or Individual Mode for a single HEIC file.
3. Drag your HEIC file or folder into the app window, enabling recursive folder scanning if needed.
4. Set the "From" format to HEIC and the "To" format to HDR.
5. Click Convert. HDR files are written to the output folder, fully offline.

• 100% offline — your photos are never sent to any server
• Bulk conversion of entire iPhone photo libraries in one pass
• Produces .hdr files compatible with architectural lighting and rendering tools
• Multi-core processing for fast handling of large batches
• Option to delete original HEIC files automatically once converted
• No recurring subscription or hidden upload limits