Microsoft Access 2007 file (.accdb)
.accdb file signature | application/x-msaccess
The ACCDB file format is a Microsoft Access database format developed and maintained by Microsoft for the Access 2007 and later application versions. It is used to store relational databases, including tables, queries, forms, reports, and application logic for business and desktop data management. It replaced the older MDB format; like other Office database files, it can contain macros and code, so files from untrusted sources should be opened with caution.
Magic Bytes
Offset 0
00 01 00 00 53 74 61 6E 64 61 72 64 20 41 43 45 20 44 42
Sources: Wikipedia, Gary Kessler
All Known Signatures
2 signature variants are documented for .accdb files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 00 01 00 00 53 74 61 6E 64 61 72 64 20 41 43 45 20 44 42 | 0 | Wikipedia, Gary Kessler |
| 00 01 00 00 53 74 61 6E | 0 | Apache Tika |
Extension
.accdb
MIME Type
application/x-msaccess
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .accdb files in 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, 0x64, 0x61, 0x72, 0x64, 0x20, 0x41, 0x43, 0x45, 0x20, 0x44, 0x42])
with open(file_path, "rb") as f:
return f.read(19) == signatureHow to validate .accdb files in Node.js
function isACCDB(buffer: Buffer): boolean {
const signature = Buffer.from([0x00, 0x01, 0x00, 0x00, 0x53, 0x74, 0x61, 0x6E, 0x64, 0x61, 0x72, 0x64, 0x20, 0x41, 0x43, 0x45, 0x20, 0x44, 0x42]);
return buffer.subarray(0, 19).equals(signature);
}How to validate .accdb files in Go
func IsACCDB(data []byte) bool {
signature := []byte{0x00, 0x01, 0x00, 0x00, 0x53, 0x74, 0x61, 0x6E, 0x64, 0x61, 0x72, 0x64, 0x20, 0x41, 0x43, 0x45, 0x20, 0x44, 0x42}
if len(data) < 19 {
return false
}
return bytes.Equal(data[:19], signature)
}API Endpoint
/api/v1/accdb
curl https://filesignature.org/api/v1/accdb
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .accdb file?
A .accdb file is a Microsoft Access 2007 file file. The ACCDB file format is a Microsoft Access database format developed and maintained by Microsoft for the Access 2007 and later application versions. It is used to store relational databases, including tables, queries, forms, reports, and application logic for business and desktop data management. It replaced the older MDB format; like other Office database files, it can contain macros and code, so files from untrusted sources should be opened with caution.
What are the magic bytes for .accdb files?
The magic bytes for Microsoft Access 2007 file files are 00 01 00 00 53 74 61 6E 64 61 72 64 20 41 43 45 20 44 42 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .accdb file?
To validate a .accdb file, read the first bytes of the file and compare them against the known magic bytes (00 01 00 00 53 74 61 6E 64 61 72 64 20 41 43 45 20 44 42) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .accdb files?
The primary MIME type for .accdb files is application/x-msaccess.
Is it safe to open .accdb files?
Microsoft Access 2007 file (.accdb) 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.