How to open a .SPK file online
No extra software to download or install.
Pick your .SPK file
Drag it in or click to choose it. We read its contents list first, so it opens right away without unpacking everything.
Browse what's inside
See every file with its size, how much it's compressed and its date, and search by name across all the folders.
Preview or download
Click a file to preview text or images, or save just that one. Need everything? Download it all as a single ZIP.
About .SPK files
What a .SPK file is, and what's inside it.
An SPK file is a Synology Package, an application installer for a Synology NAS running DiskStation Manager (DSM). You install it through DSM's Package Center using Manual Install, not by double-clicking it on a PC. You can inspect its contents on any computer because it is a standard TAR archive, but running the app requires the NAS.
Programs that open .SPK files
| Full name | Synology Package |
|---|---|
| Developer | Synology Inc. |
| First released | 2010s (Synology DiskStation Manager Package Center) |
| Category | Archives |
| MIME type | application/x-tar |
| Signature | 75 73 74 61 72 "ustar" - POSIX TAR magic at offset 257 |
Related viewers
Found something inside the archive? Open it here.
Do I have to unpack the whole .SPK file?
No. The viewer reads its table of contents first and only unpacks a file when you click it. That works even with multi-gigabyte archives, because we read just the bytes we need.
Can I open password-protected archives?
Yes, for ZIP (ZipCrypto and AES) and 7Z. You'll be asked for the password,. We can't recover forgotten passwords.
Is my .SPK file uploaded anywhere?
No. The code that unpacks the file is downloaded once and then reused.
Why does a .docx or .apk open as an archive?
Because they are ZIP archives under the hood. Office documents, Android apps, Java programs and EPUB books all use ZIP as their container.
What about split archives (.001, .z01, .part1.rar)?
Multi-part archives need all their parts. Today you can open the first part to see the file list; joining parts is on our roadmap.
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