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Quicken data file

application/octet-stream

Safe

Magic Bytes

Offset: 0
51 20 BE FF E5 00 6F 00 6F 00 74 00 20 00 45 00 6E 00 74 00 72 00 79 00

The Quicken Address Book is a proprietary database format developed by Intuit for use within its personal financial management software suite. This format stores user-defined contact information, mailing addresses, and payee details linked to specific financial transactions. As a legacy format largely replaced by integrated database structures in modern iterations, it presents minimal security risks and is primarily encountered when migrating historical records from older versions of the application.

Extension

.abd

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .abd files in Python

Python 
def is_abd(file_path: str) -> bool:
    """Check if file is a valid ABD by magic bytes."""
    signature = bytes([0x51, 0x20, 0xBE, 0xFF, 0xE5, 0x00, 0x6F, 0x00, 0x6F, 0x00, 0x74, 0x00, 0x20, 0x00, 0x45, 0x00, 0x6E, 0x00, 0x74, 0x00, 0x72, 0x00, 0x79, 0x00])
    with open(file_path, "rb") as f:
        return f.read(24) == signature

How to validate .abd files in Node.js

Node.js 
function isABD(buffer: Buffer): boolean {
  const signature = Buffer.from([0x51, 0x20, 0xBE, 0xFF, 0xE5, 0x00, 0x6F, 0x00, 0x6F, 0x00, 0x74, 0x00, 0x20, 0x00, 0x45, 0x00, 0x6E, 0x00, 0x74, 0x00, 0x72, 0x00, 0x79, 0x00]);
  return buffer.subarray(0, 24).equals(signature);
}

How to validate .abd files in Go

Go 
func IsABD(data []byte) bool {
    signature := []byte{0x51, 0x20, 0xBE, 0xFF, 0xE5, 0x00, 0x6F, 0x00, 0x6F, 0x00, 0x74, 0x00, 0x20, 0x00, 0x45, 0x00, 0x6E, 0x00, 0x74, 0x00, 0x72, 0x00, 0x79, 0x00}
    if len(data) < 24 {
        return false
    }
    return bytes.Equal(data[:24], signature)
}

API Endpoint

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

Related Formats

.qdf .qsd .qel .asf .ctf .db .tsv .mdi .nc

Frequently Asked Questions

What is a .abd file?

A .abd file is a Quicken data file file. The Quicken Address Book is a proprietary database format developed by Intuit for use within its personal financial management software suite. This format stores user-defined contact information, mailing addresses, and payee details linked to specific financial transactions. As a legacy format largely replaced by integrated database structures in modern iterations, it presents minimal security risks and is primarily encountered when migrating historical records from older versions of the application.

What are the magic bytes for .abd files?

The magic bytes for Quicken data file files are 51 20 BE FF E5 00 6F 00 6F 00 74 00 20 00 45 00 6E 00 74 00 72 00 79 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .abd file?

To validate a .abd file, read the first bytes of the file and compare them against the known magic bytes (51 20 BE FF E5 00 6F 00 6F 00 74 00 20 00 45 00 6E 00 74 00 72 00 79 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 .abd files?

The primary MIME type for .abd files is application/octet-stream.

Is it safe to open .abd files?

Quicken data file (.abd) 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.