What is the SSD file format?
An .ssd file is a plain-text skin-index used internally by Stardock WindowBlinds, a Windows desktop-theming utility that reskins shell UI elements such as title bars, the taskbar, buttons, and scrollbars. The file lists the skins bundled inside a WindowBlinds skin package, recording the count, title, and filename of each included skin.
.ssd files are not interacted with directly by users - they serve as a manifest read by WindowBlinds to enumerate available skins. SkinStudio, Stardock's companion skin-authoring tool, creates and updates .ssd files automatically when packages are built.
Because the format is simple ASCII text with no binary components, any text editor can open and inspect the file. It is very small - typically under 1 KB - and contains a short, human-readable list.
The .ssd extension is unrelated to solid-state drive storage or to the legacy SAS dataset format (also .ssd, superseded by .sas7bdat). Within the WindowBlinds ecosystem it is a minor helper file; corrupting it may prevent WindowBlinds from listing skins in that package.
Security & safety
RISK: LOWSSD (WindowBlinds) is a plain text file - no executable code. Completely safe to view. The SAS .ssd variant is also passive binary data. No known security concerns for either use.
Format details
in a nutshell- Base SAS Dataset File - SAS statistical software uses .ssd (and .ssd01, .ssd07 variants) for its older Base SAS dataset/database file format on Windows.
Programs that open SSD files
Windows3 apps
WindowBlinds
Paid WindowBlinds reads .ssd files automatically as part of a skin package. No manual open action needed. 
SkinStudio
Paid WindowBlinds skin design tool; reads and writes .ssd files as part of skin package authoring.
Notepad++ (or any text editor)
Free The .ssd file is plain text; open with Notepad or Notepad++ to read the skin list contents. Technical details
deep spec| File encoding | Plain ASCII text |
| MIME type | text/plain |
| Typical file size | Under 1 KB |
| File content | Skin count plus title and filename of each individual skin in the package |
| Operating system | Windows only |
| Creator tool | SkinStudio (Stardock companion skin-authoring application) |
| Consumer application | WindowBlinds - reads the file to enumerate available skin options in a package |
| User interaction | None required - internal manifest file; end users do not open or edit it directly |
| Text editor readable | Yes - content is human-readable plain ASCII |
| Released | late 1990s-early 2000s (WindowBlinds for Windows) |
| Latest version | WindowBlinds 11 (2023) |
| Specification | www.stardock.com |
SSD conversions
Community Q&A
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