Various JPEG-2000 image file formats (.jp2)
.jp2 file signature | image/jp2
JPEG 2000 is a raster image file format developed by the Joint Photographic Experts Group and standardized by ISO/IEC and ITU-T. It is used for still images in digital publishing, medical imaging, archiving, cinema distribution, and other applications that require efficient compression and optional lossless encoding. The format is generally safe to view, though malformed files and decoder vulnerabilities have occasionally affected image-processing software.
Magic Bytes
Offset 0
00 00 00 0C 6A 50 20 20 0D 0A 87 0A
Sources: Apache Tika, Wikipedia
All Known Signatures
2 signature variants are documented for .jp2 files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 00 00 00 0C 6A 50 20 20 0D 0A 87 0A | 0 | Apache Tika, Wikipedia |
| 00 00 00 0C 6A 50 20 20 0D 0A | 0 | Gary Kessler |
Extension
.jp2
MIME Type
image/jp2
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .jp2 files in Python
def is_jp2(file_path: str) -> bool:
"""Check if file is a valid JP2 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 .jp2 files in Node.js
function isJP2(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 .jp2 files in Go
func IsJP2(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/jp2
curl https://filesignature.org/api/v1/jp2
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .jp2 file?
A .jp2 file is a Various JPEG-2000 image file formats file. JPEG 2000 is a raster image file format developed by the Joint Photographic Experts Group and standardized by ISO/IEC and ITU-T. It is used for still images in digital publishing, medical imaging, archiving, cinema distribution, and other applications that require efficient compression and optional lossless encoding. The format is generally safe to view, though malformed files and decoder vulnerabilities have occasionally affected image-processing software.
What are the magic bytes for .jp2 files?
The magic bytes for Various JPEG-2000 image file formats 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 .jp2 file?
To validate a .jp2 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 .jp2 files?
The primary MIME type for .jp2 files is image/jp2.
Is it safe to open .jp2 files?
Various JPEG-2000 image file formats (.jp2) 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.