Microsoft Reader eBook file
application/octet-stream
Magic Bytes
Offset: 0
49 54 53 46
The Microsoft Reader eBook file is a proprietary digital book format developed by Microsoft specifically for use with the Microsoft Reader application. It was historically employed for distributing electronic literature and commercial publications intended for personal computers and handheld devices. This format is now considered obsolete following the discontinuation of the software in 2012, though it remains structurally similar to Microsoft Compiled HTML Help files with added digital rights management capabilities.
Validation Code
How to validate .lit files in Python
Python
def is_lit(file_path: str) -> bool:
"""Check if file is a valid LIT by magic bytes."""
signature = bytes([0x49, 0x54, 0x53, 0x46])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .lit files in Node.js
Node.js
function isLIT(buffer: Buffer): boolean {
const signature = Buffer.from([0x49, 0x54, 0x53, 0x46]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsLIT(data []byte) bool {
signature := []byte{0x49, 0x54, 0x53, 0x46}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/lit
curl https://filesignature.org/api/v1/lit