M
application/octet-stream
Magic Bytes
Offset: 0
6D 64 66 00
The M file format serves as a script or package definition for the Wolfram Language, developed and maintained by Wolfram Research. It is primarily used to store mathematical algorithms, symbolic computations, and scientific data structures for use within the Mathematica environment. Although inherently safe as a structured data container, the format supports executable logic, suggesting users exercise caution when loading scripts from unverified or external origins.
Validation Code
How to validate .m files in Python
Python
def is_m(file_path: str) -> bool:
"""Check if file is a valid M by magic bytes."""
signature = bytes([0x6D, 0x64, 0x66, 0x00])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .m files in Node.js
Node.js
function isM(buffer: Buffer): boolean {
const signature = Buffer.from([0x6D, 0x64, 0x66, 0x00]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsM(data []byte) bool {
signature := []byte{0x6D, 0x64, 0x66, 0x00}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/m
curl https://filesignature.org/api/v1/m