JPF (.jpf)
.jpf file signature | image/jpx
JPEG 2000format[18]
Magic Bytes
Offset 0
00 00 00 0C 6A 50 20 20 0D 0A 87 0A
Sources: Apache Tika, Wikipedia
Extension
.jpf
MIME Type
image/jpx
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .jpf files in Python
def is_jpf(file_path: str) -> bool:
"""Check if file is a valid JPF by magic bytes."""
signature = bytes([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A])
with open(file_path, "rb") as f:
return f.read(12) == signatureHow to validate .jpf files in Node.js
function isJPF(buffer: Buffer): boolean {
const signature = Buffer.from([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A]);
return buffer.subarray(0, 12).equals(signature);
}How to validate .jpf files in Go
func IsJPF(data []byte) bool {
signature := []byte{0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A}
if len(data) < 12 {
return false
}
return bytes.Equal(data[:12], signature)
}API Endpoint
/api/v1/jpf
curl https://filesignature.org/api/v1/jpf
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .jpf file?
A .jpf file is a JPF file. JPEG 2000format[18]
What are the magic bytes for .jpf files?
The magic bytes for JPF files are 00 00 00 0C 6A 50 20 20 0D 0A 87 0A at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .jpf file?
To validate a .jpf file, read the first bytes of the file and compare them against the known magic bytes (00 00 00 0C 6A 50 20 20 0D 0A 87 0A) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .jpf files?
The primary MIME type for .jpf files is image/jpx.
Is it safe to open .jpf files?
JPF (.jpf) 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.