QuickBooks Portable Company File (.qbm)
.qbm file signature | application/octet-stream
Magic Bytes
Offset: 0
CF FA ED FE
QuickBooks Portable Company File
Sources: Gary Kessler
All Known Signatures
3 signature variants are documented for .qbm files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| CF FA ED FE | 0 | Gary Kessler |
| D0 CF 11 E0 A1 B1 1A E1 | 0 | Gary Kessler |
| 51 20 BE FF EF FF FF FF 04 | 0 | Gary Kessler |
Validation Code
How to validate .qbm files in Python
def is_qbm(file_path: str) -> bool:
"""Check if file is a valid QBM by magic bytes."""
signature = bytes([0xCF, 0xFA, 0xED, 0xFE])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .qbm files in Node.js
function isQBM(buffer: Buffer): boolean {
const signature = Buffer.from([0xCF, 0xFA, 0xED, 0xFE]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .qbm files in Go
func IsQBM(data []byte) bool {
signature := []byte{0xCF, 0xFA, 0xED, 0xFE}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/qbm
curl https://filesignature.org/api/v1/qbm
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .qbm file?
A .qbm file is a QuickBooks Portable Company File file. QuickBooks Portable Company File
What are the magic bytes for .qbm files?
The magic bytes for QuickBooks Portable Company File files are CF FA ED FE at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .qbm file?
To validate a .qbm file, read the first bytes of the file and compare them against the known magic bytes (CF FA ED FE) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .qbm files?
There is no officially registered MIME type for .qbm files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .qbm files?
QuickBooks Portable Company File (.qbm) 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.