Radiance map
File type: Graphics file
Files with hdr file suffix can mainly be found as radiance maps, some sort of graphics format that includes illumination and lighting data.
Found 11 different file type records with the same hdr filename suffix.
File type category:
Graphics file
Date updated: January 2, 2025
The hdr file extension is associated with Adobe Photoshop and used for files containing radiance map data.
Radiance maps are useful for representing true illumination values in image-based rendering applications, and are useful for recording incident illumination and using this light to illuminate CG objects for realistic compositing.
HDR is also abbreviation for High Dynamic Range imaging technique.
Use Adobe Photoshop to work with the* .hdr files.
Conversion to other formats is not possible.
Englishimage/vnd.radianceimage/x-hdr23 3F 52 41 44 49 41 4E 43 45 0A
#?RADIANCE.
Software applications that can open hdr files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
Software applications that can edit hdr files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
Software capable of saving hdr files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
Programs for viewing hdr files:
Multiplatform
Software apps that import hdr files:
Multiplatform
Software apps that export hdr files:
Microsoft Windows
Multiplatform
Software applications that handle other tasks involving hdr files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
File type category:
Text file
Date updated: March 28, 2024
The hdr file extension is also related to a special raster data header file is an ASCII text file containing size and coordinate information for the layer.
Many standard software packages require the hdr file to provide important geo-referencing information for the image.
The *.hdr files are used for internal purposes of ArcView.
Conversion to other formats is not possible.
Software apps that create hdr files:
Microsoft Windows
Software applications that handle other tasks involving hdr files:
Microsoft Windows
File type category:
Various data file
Date updated: July 26, 2018
The hdr file extension is associated with DataFlex and use for header files.
If header files exist, there will be one HDR for each DAT. The header file is mostly a copy of the the first 2,776 bytes of the datafile in case that part of the file gets clobbered for some reason.
An administrative utility allows a developer to restore a damaged header based on the 'backup' provided in the HDR file.
Probably not meant to be accessed by the user.
Probably cannot be converted to anything else.
File type category:
Various data file
Date updated: January 2, 2018
The hdr file extension is associated with ENVI, a software solution used to process and analyze geospatial images for Microsoft Windows, from Exelis Visual Information Solutions.
The hdr file contains header data.
application/envi.hdrFile type category:
Various data file
Date updated: September 29, 2017
File extension hdr is also related InstallShield Windows software installation program. These files contain some sort of header information for setup.
Most likely only used for the purposes of InstallShield.
As much as we could gather, no hdr conversion for this file type is possible.
Software applications that handle other tasks involving hdr files:
Microsoft Windows
File type category:
Various data file
Date updated: October 21, 2026
Record marked as obsolete and not updated for a long time.
PostalOne! is a web-based service operated by the United States Postal Service for electronic mailing documentation and related submission processes. Mail.dat is used to exchange structured mailing information between mailing software and postal systems.
An hdr file stores header information for a Mail.dat job. It is one component of a larger set of Mail.dat files, which together describe the mailing and its processing data.
The file is intended for processing as part of a Mail.dat submission rather than as a standalone document. This format is considered obsolete and is mainly relevant to older Mail.dat workflows.
An hdr file is normally generated and processed by mailing-industry software that supports Mail.dat and submits data through PostalOne!. It is not generally opened as a document in a web browser.
A plain-text editor may display the file's contents for inspection, but editing it manually can make the associated Mail.dat job invalid. Use the software that created the complete Mail.dat file set when possible.
There is no general-purpose conversion from Mail.dat header data to a standalone document format. The header file is one part of a Mail.dat job and depends on the other files in that job.
When a different output is required, use compatible mailing software to import the Mail.dat job and export or submit it in a supported format. Older files may need to be regenerated from the original mailing data.
File type category:
Various data file
Date updated: June 26, 2018
The hdr file extension was also used in old program by MicroSim called PCBoard (also known as OrCAD PCB Designer), developed by Cadence Design Systems.
The hdr file used in this program did contain saved hole-drill schedule report.
You might be able to work with these files using PCBoard / OrCAD software.
Probably can be exported to other formats.
Software applications that can open hdr files:
Microsoft Windows
Software apps that create hdr files:
Microsoft Windows
Software applications that handle other tasks involving hdr files:
Microsoft Windows
File type category:
Various data file
Date updated: October 21, 2026
Microsoft Internet Information Services is Microsoft's extensible web server platform for Microsoft Windows. Earlier IIS installations also included an NNTP service for handling Network News Transfer Protocol news servers.
The hdr file stores header data used by that NNTP service. It forms part of the service's internal server data rather than being a user-created news article or a standalone header document.
This file type is associated with legacy IIS NNTP installations. Later IIS releases no longer include the NNTP service, so new files of this type are unlikely to be created on current Windows systems.
A hdr file should normally be accessed by the Microsoft IIS NNTP service on the Windows computer where it was created. Restore it to its original IIS data location and use the corresponding legacy NNTP installation to process it.
It is not intended to be opened in a general-purpose file viewer or editor. Make a backup before attempting to inspect or change it, because manual changes may prevent the NNTP service from using its data.
This internal IIS NNTP data file has no useful general-purpose conversion format. It should be preserved with the related legacy IIS NNTP server data rather than converted independently.
For a migration, use the original NNTP service's backup or migration procedure where available. A generic file converter cannot reliably turn this file into a standard news or text format.
Software apps that create hdr files:
Microsoft Windows
Software applications that handle other tasks involving hdr files:
Microsoft Windows
File type category:
Bitmap image file
Date updated: October 14, 2024
The hdr file extension is also related to Photomatix software and used for its default HDR image format.
In image processing, computer graphics, and photography, high dynamic range imaging (HDRI or just HDR) is a set of techniques that allows a greater dynamic range of exposures (the range of values between light and dark areas) than normal digital imaging techniques. The intention of HDRI is to accurately represent the wide range of intensity levels found in real scenes ranging from direct sunlight to shadows.
Also used for another image formats like Apollo HRDU, Analyze from Mayo Foundation Biomedical Imaging Resource etc. Probably unrelated, just sharing same extension and file type.
You can work with these HDR files using Photomatix software.
Use compatible tools to export *.hdr files to other formats.
image/vnd.radianceimage/x-hdrSoftware applications that can open hdr files:
Microsoft Windows
Apple macOS / Mac OS X
Software applications that can edit hdr files:
Microsoft Windows
Apple macOS / Mac OS X
Software capable of saving hdr files:
Microsoft Windows
Apple macOS / Mac OS X
Programs for viewing hdr files:
Apple macOS / Mac OS X
Software apps that create hdr files:
Microsoft Windows
Apple macOS / Mac OS X
Software apps that import hdr files:
Microsoft Windows
Software apps that print hdr files:
Microsoft Windows
Apple macOS / Mac OS X
File type category:
Various data file
Date updated: January 9, 2019
Record marked as obsolete and not updated for a long time.
The hdr file extension was also used by Procomm Plus, a terminal emulation and file transfer software from Symantec.
The hdr file used in Procomm contains saved message header.
Software applications that handle other tasks involving hdr files:
Microsoft Windows
File type category:
Game file
Date updated: October 7, 2026
The hdr file extension is associated with Transport Fever, an economic simulation and railroad tycoon game developed by Urban Games for Microsoft Windows and macOS.
The hdr file contains texture data used to render a 3D model. It may also be used by Transport Fever modifications.
Transport Fever opens and uses these files as game assets on Windows and macOS. They are not normally intended to be opened as standalone documents.
To inspect or edit an hdr file, use tools that support the Transport Fever modding workflow. General-purpose image editors may not recognize this game-specific texture format.
The file is normally retained in its original form for use by Transport Fever.
For a mod, the practical approach is to edit the source texture and export it through a Transport Fever-compatible modding workflow rather than convert an existing hdr file with a generic image converter.
Software applications that handle other tasks involving hdr files:
Multiplatform
online = can be converted online at 101convert.com
Online conversions and file conversion information are provided by 101convert.com.
