TXT (.txt)
.txt file signature | text/plain
UTF-16LEbyte order mark, commonly seen in text files.[28][29][30]
Magic Bytes
Offset 0
FE FF
Sources: Apache Tika, Wikipedia
All Known Signatures
11 signature variants are documented for .txt files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| FE FF | 0 | Apache Tika, Wikipedia |
| FF FE | 0 | Apache Tika, Wikipedia |
| EF BB BF | 0 | Apache Tika, Wikipedia |
| 54 68 69 73 20 69 73 20 54 65 58 2C | 0 | Apache Tika |
| 54 68 69 73 20 69 73 20 4D 45 54 41 46 4F 4E 54 2C | 0 | Apache Tika |
| 2F 2A | 0 | Apache Tika |
| 2F 2F | 0 | Apache Tika |
| 3B 3B | 0 | Apache Tika |
| FF FE 00 00 | 0 | Wikipedia |
| 00 00 FE FF | 0 | Wikipedia |
| 0E FE FF | 0 | Wikipedia |
Extension
.txt
MIME Type
text/plain
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .txt files in Python
def is_txt(file_path: str) -> bool:
"""Check if file is a valid TXT by magic bytes."""
signature = bytes([0xFE, 0xFF])
with open(file_path, "rb") as f:
return f.read(2) == signatureHow to validate .txt files in Node.js
function isTXT(buffer: Buffer): boolean {
const signature = Buffer.from([0xFE, 0xFF]);
return buffer.subarray(0, 2).equals(signature);
}How to validate .txt files in Go
func IsTXT(data []byte) bool {
signature := []byte{0xFE, 0xFF}
if len(data) < 2 {
return false
}
return bytes.Equal(data[:2], signature)
}API Endpoint
/api/v1/txt
curl https://filesignature.org/api/v1/txt
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .txt file?
A .txt file is a TXT file. UTF-16LEbyte order mark, commonly seen in text files.[28][29][30]
What are the magic bytes for .txt files?
The magic bytes for TXT files are FE FF at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .txt file?
To validate a .txt file, read the first bytes of the file and compare them against the known magic bytes (FE FF) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .txt files?
The primary MIME type for .txt files is text/plain.
Is it safe to open .txt files?
TXT (.txt) 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.