Microsoft Access 2007 file
application/x-msaccess
Magic Bytes
Offset: 0
00 01 00 00 53 74 61 6E
The ACCDB file format is a proprietary database standard developed and maintained by Microsoft as the default format for Microsoft Access since 2007. It functions as a relational database management system used to organize structured data, generate reports, and build custom desktop applications within the Office ecosystem. Introduced to succeed the legacy MDB format, it supports complex data types while omitting older user-level security features in favor of modern encryption and data integrity standards.
Validation Code
How to validate .accdb files in Python
Python
def is_accdb(file_path: str) -> bool:
"""Check if file is a valid ACCDB by magic bytes."""
signature = bytes([0x00, 0x01, 0x00, 0x00, 0x53, 0x74, 0x61, 0x6E])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .accdb files in Node.js
Node.js
function isACCDB(buffer: Buffer): boolean {
const signature = Buffer.from([0x00, 0x01, 0x00, 0x00, 0x53, 0x74, 0x61, 0x6E]);
return buffer.subarray(0, 8).equals(signature);
}
Go
func IsACCDB(data []byte) bool {
signature := []byte{0x00, 0x01, 0x00, 0x00, 0x53, 0x74, 0x61, 0x6E}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
GET
/api/v1/accdb
curl https://filesignature.org/api/v1/accdb