MS Agent Character file (.acs)
.acs file signature | application/octet-stream
MS Agent Character file
Magic Bytes
Offset 0
C3 AB CD AB
Sources: Gary Kessler
Extension
.acs
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .acs files in Python
def is_acs(file_path: str) -> bool:
"""Check if file is a valid ACS by magic bytes."""
signature = bytes([0xC3, 0xAB, 0xCD, 0xAB])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .acs files in Node.js
function isACS(buffer: Buffer): boolean {
const signature = Buffer.from([0xC3, 0xAB, 0xCD, 0xAB]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .acs files in Go
func IsACS(data []byte) bool {
signature := []byte{0xC3, 0xAB, 0xCD, 0xAB}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/acs
curl https://filesignature.org/api/v1/acs
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .acs file?
A .acs file is a MS Agent Character file file. MS Agent Character file
What are the magic bytes for .acs files?
The magic bytes for MS Agent Character file files are C3 AB CD AB at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .acs file?
To validate a .acs file, read the first bytes of the file and compare them against the known magic bytes (C3 AB CD AB) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .acs files?
There is no officially registered MIME type for .acs files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .acs files?
MS Agent Character file (.acs) 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.