{"success":true,"data":{"ext":"jpgm","name":"JPGM","description":"JPGM is a JPEG 2000 image format defined by the Joint Photographic Experts Group and standardized by ISO/IEC for storing bitmap images with advanced compression features. It is used for still images in archival systems, digital publishing, and specialized imaging workflows that require layered or high-fidelity image encoding. The format is less common than baseline JPEG, but it remains generally safe to open in modern viewers, with risks mainly limited to malformed files or decoder bugs.","mime":["image/jpm"],"risk_level":"Safe","signatures":[{"hex":"00 00 00 0C 6A 50 20 20 0D 0A 87 0A","offset":0,"sources":[{"name":"Apache Tika","url":"https://raw.githubusercontent.com/apache/tika/main/tika-core/src/main/resources/org/apache/tika/mime/tika-mimetypes.xml"}]}],"related":["jpm","jp2","jpf","jxl","j2k","jpc"],"usage":{"python":"def is_jpgm(file_path: str) -> bool:\n    \"\"\"Check if file is a valid JPGM by magic bytes.\"\"\"\n    signature = bytes([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A])\n    with open(file_path, \"rb\") as f:\n        return f.read(12) == signature","node":"function isJPGM(buffer: Buffer): boolean {\n  const signature = Buffer.from([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A]);\n  return buffer.subarray(0, 12).equals(signature);\n}","go":"func IsJPGM(data []byte) bool {\n    signature := []byte{0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A}\n    if len(data) < 12 {\n        return false\n    }\n    return bytes.Equal(data[:12], signature)\n}"},"category":"Images"}}