Flight Simulator Aircraft Configuration file (.cfg)
.cfg file signature | text/plain
Flight Simulator Aircraft Configuration files are plain-text configuration files used by Microsoft Flight Simulator and maintained as part of the simulator’s aircraft definition system by Microsoft. They store parameters for aircraft behavior, performance, geometry, and flight characteristics, and are used when creating, modifying, or loading add-on aircraft. As a text-based format, they are generally safe to inspect, though malformed entries can affect simulator behavior; the format has long been used across successive Flight Simulator releases.
Magic Bytes
Offset 0
5B 66 6C 74 73 69 6D 2E 30 5D
Sources: Gary Kessler
Extension
.cfg
MIME Type
text/plain
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .cfg files in Python
def is_cfg(file_path: str) -> bool:
"""Check if file is a valid CFG by magic bytes."""
signature = bytes([0x5B, 0x66, 0x6C, 0x74, 0x73, 0x69, 0x6D, 0x2E, 0x30, 0x5D])
with open(file_path, "rb") as f:
return f.read(10) == signatureHow to validate .cfg files in Node.js
function isCFG(buffer: Buffer): boolean {
const signature = Buffer.from([0x5B, 0x66, 0x6C, 0x74, 0x73, 0x69, 0x6D, 0x2E, 0x30, 0x5D]);
return buffer.subarray(0, 10).equals(signature);
}How to validate .cfg files in Go
func IsCFG(data []byte) bool {
signature := []byte{0x5B, 0x66, 0x6C, 0x74, 0x73, 0x69, 0x6D, 0x2E, 0x30, 0x5D}
if len(data) < 10 {
return false
}
return bytes.Equal(data[:10], signature)
}API Endpoint
/api/v1/cfg
curl https://filesignature.org/api/v1/cfg
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .cfg file?
A .cfg file is a Flight Simulator Aircraft Configuration file file. Flight Simulator Aircraft Configuration files are plain-text configuration files used by Microsoft Flight Simulator and maintained as part of the simulator’s aircraft definition system by Microsoft. They store parameters for aircraft behavior, performance, geometry, and flight characteristics, and are used when creating, modifying, or loading add-on aircraft. As a text-based format, they are generally safe to inspect, though malformed entries can affect simulator behavior; the format has long been used across successive Flight Simulator releases.
What are the magic bytes for .cfg files?
The magic bytes for Flight Simulator Aircraft Configuration file files are 5B 66 6C 74 73 69 6D 2E 30 5D at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .cfg file?
To validate a .cfg file, read the first bytes of the file and compare them against the known magic bytes (5B 66 6C 74 73 69 6D 2E 30 5D) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .cfg files?
The primary MIME type for .cfg files is text/plain.
Is it safe to open .cfg files?
Flight Simulator Aircraft Configuration file (.cfg) 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.