KDB (.kdb)

.kdb file signature | application/octet-stream

KDB is the KeePass 1 password database file format, created and maintained by Dominik Reichl for the KeePass Password Safe project. It stores encrypted credentials, notes, and related entries for personal and organizational password management, and is opened by KeePass and compatible password manager tools. As a legacy format, it is generally safe, but files should still be handled carefully because they contain sensitive data and may be targeted by attackers.

Safe

Magic Bytes

Offset 0


              37 48 03 02 00 00 00 00

Sources: Wikipedia

All Known Signatures

2 signature variants are documented for .kdb files across multiple sources.

Hex Signature	Offset	Sources
37 48 03 02 00 00 00 00	0	Wikipedia
58 35 30 39 4B 45 59	0	Wikipedia

Extension

.kdb

MIME Type

application/octet-stream

Byte Offset

Risk Level

Safe

Validation Code

How to validate .kdb files in Python

Python

def is_kdb(file_path: str) -> bool:
    """Check if file is a valid KDB by magic bytes."""
    signature = bytes([0x37, 0x48, 0x03, 0x02, 0x00, 0x00, 0x00, 0x00])
    with open(file_path, "rb") as f:
        return f.read(8) == signature

How to validate .kdb files in Node.js

Node.js

function isKDB(buffer: Buffer): boolean {
  const signature = Buffer.from([0x37, 0x48, 0x03, 0x02, 0x00, 0x00, 0x00, 0x00]);
  return buffer.subarray(0, 8).equals(signature);
}

How to validate .kdb files in Go

func IsKDB(data []byte) bool {
    signature := []byte{0x37, 0x48, 0x03, 0x02, 0x00, 0x00, 0x00, 0x00}
    if len(data) < 8 {
        return false
    }
    return bytes.Equal(data[:8], signature)
}

API Endpoint

GET /api/v1/kdb


              curl https://filesignature.org/api/v1/kdb

See the full API documentation for all endpoints and parameters.

Related Formats

.asc .crt .csr .der .gpg .key

Frequently Asked Questions

What is a .kdb file?

A .kdb file is identified by the magic bytes 37 48 03 02 00 00 00 00 at byte offset 0. KDB is the KeePass 1 password database file format, created and maintained by Dominik Reichl for the KeePass Password Safe project. It stores encrypted credentials, notes, and related entries for personal and organizational password management, and is opened by KeePass and compatible password manager tools. As a legacy format, it is generally safe, but files should still be handled carefully because they contain sensitive data and may be targeted by attackers.

What are the magic bytes for .kdb files?

The magic bytes for KDB files are 37 48 03 02 00 00 00 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .kdb file?

To validate a .kdb file, read the first bytes of the file and compare them against the known magic bytes (37 48 03 02 00 00 00 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 .kdb files?

There is no officially registered MIME type for .kdb files. Systems typically use application/octet-stream as a generic fallback when handling this format.

Is it safe to open .kdb files?

KDB (.kdb) 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.