File Extension HDT

  • Full name
    Photoshop HDR Toning Preset Format
  • Developer
    Adobe Systems
  • Popularity
Have you encountered a problem with a HDT file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a HDT file here. In the further part of this page we have added a list of programs that should open your HDT file. It is enough you choose a proper application for your operating system, download and install it.


The file extension HDT is used for so-called High Dynamic Tone or 32 Bit Toning Options files of the image editing software Photoshop. These files contain tone curve values that can be used when converting 32-bit High Dynamic Range (HDR) images to 16-bit or 8-bit color depth.

An opened 32 bit HDR image can be converted to another image mode with 'Image -> Mode'. If you select an 8 or 16 bit mode, you can load and save HDT files in the following window 'HDR conversion'. You can also use the small arrow to display the corresponding tone curve and the histogram of the image.

Programs which can open a HDT file

How to open a HDT file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the HDT file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a HDT file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support HDT files. At this point we are looking for disk space where the application was installed in and we can link it with a HDT file. Since then, our operating system will use the selected program to support all HDT files.

Other issues

Despite the described problem with HDT there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the HDT file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the HDT file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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