AOL personal file cabinet (.org)
.org file signature | application/octet-stream
AOL Personal File Cabinet (PFC) is a legacy file format created by America Online for storing user data within AOL client software. It was used to archive items such as address books, mail, and other account-related information in older AOL applications. The format is largely obsolete and may appear in historical archives; files are generally safe, though opening them now typically requires legacy-compatible software.
Magic Bytes
Offset 0
41 4F 4C 56 4D 31 30 30
Sources: Gary Kessler
Extension
.org
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .org files in Python
def is_org(file_path: str) -> bool:
"""Check if file is a valid ORG by magic bytes."""
signature = bytes([0x41, 0x4F, 0x4C, 0x56, 0x4D, 0x31, 0x30, 0x30])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .org files in Node.js
function isORG(buffer: Buffer): boolean {
const signature = Buffer.from([0x41, 0x4F, 0x4C, 0x56, 0x4D, 0x31, 0x30, 0x30]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .org files in Go
func IsORG(data []byte) bool {
signature := []byte{0x41, 0x4F, 0x4C, 0x56, 0x4D, 0x31, 0x30, 0x30}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/org
curl https://filesignature.org/api/v1/org
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .org file?
A .org file is a AOL personal file cabinet file. AOL Personal File Cabinet (PFC) is a legacy file format created by America Online for storing user data within AOL client software. It was used to archive items such as address books, mail, and other account-related information in older AOL applications. The format is largely obsolete and may appear in historical archives; files are generally safe, though opening them now typically requires legacy-compatible software.
What are the magic bytes for .org files?
The magic bytes for AOL personal file cabinet files are 41 4F 4C 56 4D 31 30 30 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .org file?
To validate a .org file, read the first bytes of the file and compare them against the known magic bytes (41 4F 4C 56 4D 31 30 30) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .org files?
There is no officially registered MIME type for .org files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .org files?
AOL personal file cabinet (.org) 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.