HDR File

What are HDR files and how to open them

Are you having problems opening a HDR file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a HDR file?

HDR files have multiple uses, and High Dynamic Range Raytrace Bitmap is one of them. Read more about the others further down the page.

High Dynamic Range Raytrace Bitmap

HDR is an acronym for High Dynamic Range. These files are created with the Radiance ray-tracing software.

Radiance is used to analyze and visualize lighting in various design scenarios. As input, you can provide geometry data, materials, luminaires, sky conditions, etc.

Architects and engineers use Radiance to predict illumination, visual quality, and appearance of innovative design spaces.

How to open HDR files

We have identified one HDR opener that is compatible with this specific type of HDR file.

Programs that open High Dynamic Range Raytrace Bitmap files


Last updated: December 8, 2022

All known file formats using extension .HDR

While High Dynamic Range Raytrace Bitmap is a popular type of HDR-file, we know of 5 different uses of the .HDR file extension. Different software may use files with the same extension for different types of data.

Mayo/SPM Analyze Format Header File

Mayo Clinic Analyze uses a file format for storing MRI data. A data set consists of two files:

  • Header file (name.hdr): Provides dimensional, identifying, and some processing history information
  • Image file (name.img): Stream of voxels, whose datatype and ordering are described by the header file

While we have not verified the apps ourselves yet, our users have suggested 10 different HDR openers which you will find listed below.

More file formats using the HDR extension

Through our research of HDR files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • Hangul Draw 96 Data
  • HotHelp Header File
  • InstallShield Setup Header File

Various apps that use files with this extension

These apps are known to open certain types of HDR files. Remember, different programs may use HDR files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Adobe PhotoshopAdobe PhotoshopUser submitted
Ashampoo Photo CommanderAshampoo Photo CommanderUser submitted
Corel PaintShop ProCorel PaintShop ProUser submitted
Zoner Photo StudioZoner Photo StudioUser submitted
Luminance HDRLuminance HDRUser submitted
CompeGPS LANDCompeGPS LANDUser submitted
MultitrackStudio LiteMultitrackStudio LiteUser submitted
MysticThumbsMysticThumbsUser submitted
Ashampoo Photo Commander FREEAshampoo Photo Commander FREEUser submitted
easyHDR PROeasyHDR PROUser submitted

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about HDR file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.