MUI (.mui)
.mui file signature | application/octet-stream
DOS MZ executableand its descendants (includingNEandPE)
Magic Bytes
Offset 0
4D 5A
Sources: Wikipedia
Extension
.mui
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .mui files in Python
def is_mui(file_path: str) -> bool:
"""Check if file is a valid MUI by magic bytes."""
signature = bytes([0x4D, 0x5A])
with open(file_path, "rb") as f:
return f.read(2) == signatureHow to validate .mui files in Node.js
function isMUI(buffer: Buffer): boolean {
const signature = Buffer.from([0x4D, 0x5A]);
return buffer.subarray(0, 2).equals(signature);
}How to validate .mui files in Go
func IsMUI(data []byte) bool {
signature := []byte{0x4D, 0x5A}
if len(data) < 2 {
return false
}
return bytes.Equal(data[:2], signature)
}API Endpoint
/api/v1/mui
curl https://filesignature.org/api/v1/mui
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .mui file?
A .mui file is a MUI file. DOS MZ executableand its descendants (includingNEandPE)
What are the magic bytes for .mui files?
The magic bytes for MUI files are 4D 5A at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .mui file?
To validate a .mui file, read the first bytes of the file and compare them against the known magic bytes (4D 5A) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .mui files?
There is no officially registered MIME type for .mui files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .mui files?
MUI (.mui) 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.