TrueType font file
application/x-font-ttf
Magic Bytes
Offset: 0
00 01 00 00
The TrueType font file (TTF) is a digital typeface standard originally developed by Apple in the late 1980s and later licensed to Microsoft. It serves as the primary format for rendering scalable fonts across operating systems, web browsers, and various desktop publishing applications. While considered a legacy standard compared to OpenType, it remains widely supported; security risks are minimal, though maliciously crafted files could theoretically exploit font parsing vulnerabilities in older systems.
Validation Code
How to validate .ttf files in Python
Python
def is_ttf(file_path: str) -> bool:
"""Check if file is a valid TTF by magic bytes."""
signature = bytes([0x00, 0x01, 0x00, 0x00])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .ttf files in Node.js
Node.js
function isTTF(buffer: Buffer): boolean {
const signature = Buffer.from([0x00, 0x01, 0x00, 0x00]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsTTF(data []byte) bool {
signature := []byte{0x00, 0x01, 0x00, 0x00}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/ttf
curl https://filesignature.org/api/v1/ttf