dBASE IV data file
application/octet-stream
Magic Bytes
Offset: 0
04 00 00 00 20 03 00 00
The dBASE IV data file is a legacy relational database format originally developed by Ashton-Tate for structured information storage and management. It functions as a primary container for tables, records, and field definitions within early desktop database applications and compatible legacy spreadsheet programs. Although now obsolete in modern production environments, the format remains readable by specialized data recovery tools and presents minimal security risks because it does not support executable macros.
Validation Code
How to validate .db4 files in Python
Python
def is_db4(file_path: str) -> bool:
"""Check if file is a valid DB4 by magic bytes."""
signature = bytes([0x04, 0x00, 0x00, 0x00, 0x20, 0x03, 0x00, 0x00])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .db4 files in Node.js
Node.js
function isDB4(buffer: Buffer): boolean {
const signature = Buffer.from([0x04, 0x00, 0x00, 0x00, 0x20, 0x03, 0x00, 0x00]);
return buffer.subarray(0, 8).equals(signature);
}
Go
func IsDB4(data []byte) bool {
signature := []byte{0x04, 0x00, 0x00, 0x00, 0x20, 0x03, 0x00, 0x00}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
GET
/api/v1/db4
curl https://filesignature.org/api/v1/db4