FT9 (.ft9)
.ft9 file signature | image/x-freehand
Magic Bytes
Offset 0
41 47 44 32
Sources: Apache Tika
All Known Signatures
6 signature variants are documented for .ft9 files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 41 47 44 32 | 0 | Apache Tika |
| 41 47 44 33 | 0 | Apache Tika |
| 41 47 44 34 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 30 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 31 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 32 | 0 | Apache Tika |
Extension
.ft9
MIME Type
image/x-freehand
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .ft9 files in Python
def is_ft9(file_path: str) -> bool:
"""Check if file is a valid FT9 by magic bytes."""
signature = bytes([0x41, 0x47, 0x44, 0x32])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .ft9 files in Node.js
function isFT9(buffer: Buffer): boolean {
const signature = Buffer.from([0x41, 0x47, 0x44, 0x32]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .ft9 files in Go
func IsFT9(data []byte) bool {
signature := []byte{0x41, 0x47, 0x44, 0x32}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/ft9
curl https://filesignature.org/api/v1/ft9
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .ft9 file?
A .ft9 file is a FT9 file.
What are the magic bytes for .ft9 files?
The magic bytes for FT9 files are 41 47 44 32 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .ft9 file?
To validate a .ft9 file, read the first bytes of the file and compare them against the known magic bytes (41 47 44 32) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .ft9 files?
The primary MIME type for .ft9 files is image/x-freehand.
Is it safe to open .ft9 files?
FT9 (.ft9) 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.