Windows Media compressed skin file magic bytes (.wmz)
.wmz file signature: 50 4B 03 04 | application/x-ms-wmz
Windows Media compressed skin file (WMZ) is a compressed skin package format created by Microsoft for Windows Media Player. It is used to distribute custom player interfaces, including layouts, controls, and visual themes for media playback applications. The format is generally safe, though it has been less common in modern software and is largely associated with older versions of Windows Media Player.
Magic Bytes
Offset 0
50 4B 03 04
Sources: Gary Kessler
Validation Code
How to validate .wmz files in Python
def is_wmz(file_path: str) -> bool:
"""Check if file is a valid WMZ by magic bytes."""
signature = bytes([0x50, 0x4B, 0x03, 0x04])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .wmz files in Node.js
function isWMZ(buffer: Buffer): boolean {
const signature = Buffer.from([0x50, 0x4B, 0x03, 0x04]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .wmz files in Go
func IsWMZ(data []byte) bool {
signature := []byte{0x50, 0x4B, 0x03, 0x04}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/wmz
curl https://filesignature.org/api/v1/wmz
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .wmz file?
A .wmz file is a Windows Media compressed skin file. Windows Media compressed skin file (WMZ) is a compressed skin package format created by Microsoft for Windows Media Player. It is used to distribute custom player interfaces, including layouts, controls, and visual themes for media playback applications. The format is generally safe, though it has been less common in modern software and is largely associated with older versions of Windows Media Player.
What are the magic bytes for .wmz files?
The magic bytes for Windows Media compressed skin file (.wmz) files are 50 4B 03 04 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
How do I validate a .wmz file?
To validate a .wmz file, read the first bytes of the file and compare them against the known magic bytes (50 4B 03 04) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .wmz files?
The primary MIME type for .wmz files is application/x-ms-wmz.
Is it safe to open .wmz files?
Windows Media compressed skin file (.wmz) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.