dBASE III file
application/octet-stream
Magic Bytes
Offset: 0
03 00 00 00
The dBASE III database format is a legacy file structure originally developed by Ashton-Tate for early microcomputer environments. It functions as a structured tabular data container utilized by various database management tools and spreadsheet software for data interchange and storage. Although modern relational systems have largely replaced it, the format remains a common standard for archival purposes and is widely considered safe due to its lack of embedded executable content.
Validation Code
How to validate .db3 files in Python
Python
def is_db3(file_path: str) -> bool:
"""Check if file is a valid DB3 by magic bytes."""
signature = bytes([0x03, 0x00, 0x00, 0x00])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .db3 files in Node.js
Node.js
function isDB3(buffer: Buffer): boolean {
const signature = Buffer.from([0x03, 0x00, 0x00, 0x00]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsDB3(data []byte) bool {
signature := []byte{0x03, 0x00, 0x00, 0x00}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/db3
curl https://filesignature.org/api/v1/db3