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Intuit QuickBooks backup file (.qbb)

.qbb file signature | application/octet-stream

Intuit QuickBooks backup file (QBB) is a backup archive format created and maintained by Intuit for QuickBooks accounting software. It is used to store copies of company data for recovery, migration, and archival purposes within QuickBooks desktop workflows. The format is generally considered safe, but like any backup file it should be restored only in trusted QuickBooks environments and kept secure to protect sensitive financial records.

Safe

Magic Bytes

Offset 0
45 86 00 00 06 00

Sources: Gary Kessler

Extension

.qbb

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .qbb files in Python

Python 
def is_qbb(file_path: str) -> bool:
    """Check if file is a valid QBB by magic bytes."""
    signature = bytes([0x45, 0x86, 0x00, 0x00, 0x06, 0x00])
    with open(file_path, "rb") as f:
        return f.read(6) == signature

How to validate .qbb files in Node.js

Node.js 
function isQBB(buffer: Buffer): boolean {
  const signature = Buffer.from([0x45, 0x86, 0x00, 0x00, 0x06, 0x00]);
  return buffer.subarray(0, 6).equals(signature);
}

How to validate .qbb files in Go

Go 
func IsQBB(data []byte) bool {
    signature := []byte{0x45, 0x86, 0x00, 0x00, 0x06, 0x00}
    if len(data) < 6 {
        return false
    }
    return bytes.Equal(data[:6], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .qbb file?

A .qbb file is a Intuit QuickBooks backup file file. Intuit QuickBooks backup file (QBB) is a backup archive format created and maintained by Intuit for QuickBooks accounting software. It is used to store copies of company data for recovery, migration, and archival purposes within QuickBooks desktop workflows. The format is generally considered safe, but like any backup file it should be restored only in trusted QuickBooks environments and kept secure to protect sensitive financial records.

What are the magic bytes for .qbb files?

The magic bytes for Intuit QuickBooks backup file files are 45 86 00 00 06 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .qbb file?

To validate a .qbb file, read the first bytes of the file and compare them against the known magic bytes (45 86 00 00 06 00) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .qbb files?

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

Is it safe to open .qbb files?

Intuit QuickBooks backup file (.qbb) 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.