| File extension | Type | Delphi Version | Description | Keep in Source Control? |
|---|---|---|---|---|
| .bdsdeploy | Deployment file | |||
| .bdsgroup | Borland Developer Studio Project Group | |||
| .bdsproj | Project | Delphi 2005 or newer | Borland Developer Studio Project File. Successor of the .dof file holding compiler options etc. Also used for opening a project. | Yes |
| .bpg | Borland Project Group | |||
| .bpl | Binary | Delphi 4 and newer | (Binary). Borland Package Library. DLL including VCL components available for use in the Delphi environment at design time or by applications at run time. | Maybe |
| .cbk | Other | Temporary Backup File. | No | |
| .cfg | Other | Project Configuration File. | Yes | |
| .dcp | Binary | Delphi Component Package. Contains symbol information for code compiled into a package. | Maybe | |
| .dcpil | Binary | Delphi Compiler Symbolic Information. The purpose of a .DCPIL file is to provide symbolic information to the compiler about certain language constructs that can't be reconstituted from CLR metadata alone. This is a traditional Delphi technique for handling and caching compiler symbols. | Maybe | |
| .dcr | Resource | Delphi Component Resource File. Contains resource information for components, such as the icon to display in the palette. | Yes | |
| .dcu | Binary | Win32 | Delphi Compiled Unit File. | Maybe |
| .dcuil | Binary | .NET | Delphi Compiled Unit File | Maybe |
| .ddp | Other | Delphi 7 or older | Delphi Diagram Portfolio File. Used by the diagram editor. | Maybe |
| .dfm | Resource | (text). Delphi Win32 Form File. A text file listing the various objects and their property values contained within a form, including such things as form control coordinates. Right click on the form and select View as Text from the pop-up menu to view this file. Manual alterations to this file may prevent the IDE from being able to load the form. Use the Environment Options dialog to specify which format to use for newly created forms. The text format is recommended as it better supports source control. This file should not be deleted. | Yes | |
| .dof | Other | Delphi 7 or older | Delphi Project Options File. Text file containing project options (such as compiler and linker settings, version info, search path and output directories). | Yes |
| .dpc | Package Collection | |||
| .dpk | Project | Delphi Package Source File | Yes | |
| .dpkw | ||||
| .dpl | Binary | Delphi 3 and older | Delphi Package Library. Superseded by .bpl in later Delphi versions. | Maybe |
| .dpr | Project | All Delphi versions | Delphi Project File. The main file for any project. Contains the source code of the main file for a Delphi project. It is the primary entry point for the executable and refers to the other source files in the project. Do not delete. | Yes |
| .dproj | Project | Delphi 2007 | Project File. Replaces bdsproj file. | Yes |
| .drc | Other | Resource String File. Contains resource string information. Can be deleted; will be regenerated from source code by compiler. | No | |
| .dsk | IDE | Delphi Desktop File. Contains information about the desktop settings, including which files are open and the position of windows. | No | |
| .dsm | Binary | Delphi 6? | Browser Symbol information from the last successful compile. Enviroment -> Preferences -> Desktop contents. | No |
| .groupproj | Project Group | Delphi 2007 | Project Group File. Replaces bdsgroup file. | Yes |
| .identcache | IDE | Temporary Cache File created by refactoring engine to improve performance. | No | |
| .local | Other | User-specific project options. When using Starteam projects it will contain overrides to settings from the .bdsproj file. | No | |
| .map | Debugging | The optional error map file will contain a list of error addresses and source line numbers, grouped together for each source file in the application. To create a detailed .map file, ensure the {D+} compiler directive is set, and the "Detailed Map File" option selected in the Project >Options>Linker page of the IDE. | No | |
| .nfm | Resource | Delphi 8.0 or newer | Delphi .NET Form File. | Yes |
| .pas | Source | Delphi Unit Source File. | Yes | |
| .res | Resource | Binary. Resource File. Binary file associated with a project containing resource definitions, such as strings, icons, images etc.
This file will be recreated by the IDE when loading a project but the icon will get lost in that process. Therefore you should either keep it in source control or find another way to create it. |
Yes | |
| .rsm | Remote Debugging Symbols file. |
other file extensions: