JPM (.jpm)
.jpm file signature | image/jpm
JPEG 2000format[18]
Magic Bytes
Offset 0
00 00 00 0C 6A 50 20 20 0D 0A 87 0A
Sources: Apache Tika, Wikipedia
Extension
.jpm
MIME Type
image/jpm
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .jpm files in Python
def is_jpm(file_path: str) -> bool:
"""Check if file is a valid JPM 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 .jpm files in Node.js
function isJPM(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 .jpm files in Go
func IsJPM(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/jpm
curl https://filesignature.org/api/v1/jpm
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .jpm file?
A .jpm file is a JPM file. JPEG 2000format[18]
What are the magic bytes for .jpm files?
The magic bytes for JPM 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 .jpm file?
To validate a .jpm 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 .jpm files?
The primary MIME type for .jpm files is image/jpm.
Is it safe to open .jpm files?
JPM (.jpm) 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.