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Flight Simulator Aircraft Configuration file (.cfg)

.cfg file signature | application/octet-stream

Flight Simulator Aircraft Configuration file

Safe

Magic Bytes

Offset 0
5B 66 6C 74 73 69 6D 2E 30 5D

Sources: Gary Kessler

Extension

.cfg

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .cfg files in Python

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) == signature

How to validate .cfg files in Node.js

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

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

GET /api/v1/cfg
curl https://filesignature.org/api/v1/cfg

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .cfg file?

A .cfg file is a Flight Simulator Aircraft Configuration file file. Flight Simulator Aircraft Configuration file

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?

There is no officially registered MIME type for .cfg files. Systems typically use application/octet-stream as a generic fallback when handling this format.

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.