FH12
image/x-freehand
Magic Bytes
Offset: 0
41 47 44 32
The FH12 file format represents vector graphics documents associated with Macromedia FreeHand, a design software eventually acquired by Adobe Systems. These files store scalable illustrations, page layouts, and multi-page design projects commonly used in professional print publishing and web graphics. As development ceased following the Adobe acquisition, this legacy format is now considered obsolete and typically requires conversion to modern standards like Illustrator or PDF for viewing.
Validation Code
How to validate .fh12 files in Python
Python
def is_fh12(file_path: str) -> bool:
"""Check if file is a valid FH12 by magic bytes."""
signature = bytes([0x41, 0x47, 0x44, 0x32])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .fh12 files in Node.js
Node.js
function isFH12(buffer: Buffer): boolean {
const signature = Buffer.from([0x41, 0x47, 0x44, 0x32]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsFH12(data []byte) bool {
signature := []byte{0x41, 0x47, 0x44, 0x32}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/fh12
curl https://filesignature.org/api/v1/fh12