P00 (.p00)
.p00 file signature | application/octet-stream
P00 is a Commodore 64 program container format associated with the Power64 emulator and related preservation tools. It is used to store and exchange C64 binary programs, especially for emulation, archival, and software transfer between systems. The format is a legacy wrapper rather than a general-purpose container, and files should still be treated as untrusted data when opened in emulators or conversion utilities.
Magic Bytes
Offset 0
43 36 34 46 69 6C 65 00
Sources: Wikipedia
Extension
.p00
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .p00 files in Python
def is_p00(file_path: str) -> bool:
"""Check if file is a valid P00 by magic bytes."""
signature = bytes([0x43, 0x36, 0x34, 0x46, 0x69, 0x6C, 0x65, 0x00])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .p00 files in Node.js
function isP00(buffer: Buffer): boolean {
const signature = Buffer.from([0x43, 0x36, 0x34, 0x46, 0x69, 0x6C, 0x65, 0x00]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .p00 files in Go
func IsP00(data []byte) bool {
signature := []byte{0x43, 0x36, 0x34, 0x46, 0x69, 0x6C, 0x65, 0x00}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/p00
curl https://filesignature.org/api/v1/p00
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .p00 file?
A .p00 file is identified by the magic bytes 43 36 34 46 69 6C 65 00 at byte offset 0. P00 is a Commodore 64 program container format associated with the Power64 emulator and related preservation tools. It is used to store and exchange C64 binary programs, especially for emulation, archival, and software transfer between systems. The format is a legacy wrapper rather than a general-purpose container, and files should still be treated as untrusted data when opened in emulators or conversion utilities.
What are the magic bytes for .p00 files?
The magic bytes for P00 files are 43 36 34 46 69 6C 65 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .p00 file?
To validate a .p00 file, read the first bytes of the file and compare them against the known magic bytes (43 36 34 46 69 6C 65 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 .p00 files?
There is no officially registered MIME type for .p00 files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .p00 files?
P00 (.p00) 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.