Various JPEG-2000 image file formats (.jp2)

.jp2 file signature | image/jp2

Various JPEG-2000 image file formats

Safe

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

Risk Level

Safe

Validation Code

How to validate .jp2 files in Python

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) == signature

How to validate .jp2 files in Node.js

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

GET /api/v1/jp2


              curl https://filesignature.org/api/v1/jp2

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .jp2 file?

A .jp2 file is a Various JPEG-2000 image file formats file. Various JPEG-2000 image file formats

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.