ZIPX
application/zip
Magic Bytes
Offset: 0
50 4B 03 04
ZIPX is an extended archive format developed by WinZip Computing to provide advanced compression compared to the standard ZIP specification. This format is primarily utilized for archiving large datasets and high-resolution multimedia files where minimizing storage footprint is a primary requirement. While the underlying container is technically safe, users should exercise caution as archives can obfuscate malicious executables or scripts, requiring modern antivirus scanning and updated extraction software to mitigate potential security risks.
Validation Code
How to validate .zipx files in Python
Python
def is_zipx(file_path: str) -> bool:
"""Check if file is a valid ZIPX by magic bytes."""
signature = bytes([0x50, 0x4B, 0x03, 0x04])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .zipx files in Node.js
Node.js
function isZIPX(buffer: Buffer): boolean {
const signature = Buffer.from([0x50, 0x4B, 0x03, 0x04]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsZIPX(data []byte) bool {
signature := []byte{0x50, 0x4B, 0x03, 0x04}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/zipx
curl https://filesignature.org/api/v1/zipx