PET magic bytes (.pet)
.pet file signature: 78 56 34 | application/octet-stream
PET is a legacy file format associated with Commodore PET computers and related archival software tools, originally used within the Commodore ecosystem. It has been used for storing programs, data, or device-related content for vintage Commodore systems and emulators. As an obsolete format, it is generally low risk, though files from untrusted sources should still be handled carefully because legacy formats may be malformed or unsupported by modern software.
Magic Bytes
Offset 0
78 56 34
Sources: Wikipedia
Validation Code
How to validate .pet files in Python
def is_pet(file_path: str) -> bool:
"""Check if file is a valid PET by magic bytes."""
signature = bytes([0x78, 0x56, 0x34])
with open(file_path, "rb") as f:
return f.read(3) == signatureHow to validate .pet files in Node.js
function isPET(buffer: Buffer): boolean {
const signature = Buffer.from([0x78, 0x56, 0x34]);
return buffer.subarray(0, 3).equals(signature);
}How to validate .pet files in Go
func IsPET(data []byte) bool {
signature := []byte{0x78, 0x56, 0x34}
if len(data) < 3 {
return false
}
return bytes.Equal(data[:3], signature)
}API Endpoint
/api/v1/pet
curl https://filesignature.org/api/v1/pet
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .pet file?
A .pet file is identified by the magic bytes 78 56 34 at byte offset 0. PET is a legacy file format associated with Commodore PET computers and related archival software tools, originally used within the Commodore ecosystem. It has been used for storing programs, data, or device-related content for vintage Commodore systems and emulators. As an obsolete format, it is generally low risk, though files from untrusted sources should still be handled carefully because legacy formats may be malformed or unsupported by modern software.
What are the magic bytes for .pet files?
The magic bytes for PET (.pet) files are 78 56 34 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
How do I validate a .pet file?
To validate a .pet file, read the first bytes of the file and compare them against the known magic bytes (78 56 34) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .pet files?
There is no officially registered MIME type for .pet files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .pet files?
PET (.pet) 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.