What is the DID file format?
Files with the .did extension are used by Adobe Distiller Server as auxiliary descriptor files for its watched folder automation workflow. The format was developed by Adobe Systems Incorporated as a proprietary internal standard. Adobe Acrobat Distiller was one of the first components included with Acrobat, packaged in 1993, and its primary purpose was converting PostScript documents to PDF. In the watched folder workflow, Distiller monitors an “In” directory: PostScript files dropped there are automatically converted to PDF, and .did files serve as job descriptors or trigger files associated with individual batch conversion jobs. Actual PDF conversion settings - compression, colour profiles, image quality - are stored in .joboptions files, not in .did.
The .did file is an internal data format not accessed directly by users. It is strongly discouraged to manually open or edit such files. Adobe does not offer any public documentation for the .did format, and the format is considered legacy: Adobe Distiller Server has not been actively developed for years, and modern PDF workflows use Acrobat DC services, the Adobe PDF printer, or cloud-based generation via the Adobe PDF Services API.
Security & safety
RISK: LOWDID files are passive descriptor/metadata files. No known code-execution risk inherent to the format. They carry configuration data only.
Format details
in a nutshell- Intervoice IVR Script - Intervoice (telecommunications IVR systems) used .did files for call-processing script data.
- IKON Disc Image / Document ID - IKON Office Solutions used .did as a Document IDentifier file for scanned document management.
- dBASE IV Database Index - Some dBASE IV environments used .did as database index files.
Programs that open DID files
Windows2 apps
NotePad++ text editor
Built-in Try opening with a text editor (Notepad, VS Code) - if the .did is text-based, content may be readable. 
Adobe Acrobat (Distiller)
Paid DID files are consumed internally by Distiller Server watched folder processing - not opened by users directly. Distiller is included with Adobe Acrobat Pro. Technical details
deep spec| Format type | Text or binary auxiliary descriptor file (encoding not publicly documented) |
| Role | Watched folder job descriptor for Adobe Distiller Server batch conversion |
| Typical file size | Under 10 KB |
| Companion format | `.joboptions` stores the actual PDF conversion settings (compression, color profiles, image quality) |
| Associated workflow | Distiller Server watched folder: PostScript files dropped in the “In” folder are automatically converted to PDF |
| Platform | Windows, macOS |
| Developer | Adobe Systems Incorporated |
| Status | Legacy - Adobe Distiller Server no longer actively developed |
| Magic bytes | None documented |
| MIME type | application/octet-stream |
| Successor | Adobe PDF Services API, Acrobat DC, and the Adobe PDF printer for modern PDF generation workflows |
| Access | Not intended for direct user access; manually editing is strongly discouraged |
| Released | circa late 1990s (Acrobat Distiller watched folder automation) |
| Specification | helpx.adobe.com |
Community Q&A
asked by usersNo questions yet - be the first to ask about DID files.
