Free Lossless Audio Codec file (.flac)
.flac file signature | audio/flac
Free Lossless Audio Codec file
Magic Bytes
Offset 0
66 4C 61 43
Sources: Apache Tika, Wikipedia, Neil Harvey FileSignatures
All Known Signatures
2 signature variants are documented for .flac files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 66 4C 61 43 | 0 | Apache Tika, Wikipedia, Neil Harvey FileSignatures |
| 66 4C 61 43 00 00 00 22 | 0 | Gary Kessler |
Extension
.flac
MIME Type
audio/flac, audio/x-flac
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .flac files in Python
def is_flac(file_path: str) -> bool:
"""Check if file is a valid FLAC by magic bytes."""
signature = bytes([0x66, 0x4C, 0x61, 0x43])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .flac files in Node.js
function isFLAC(buffer: Buffer): boolean {
const signature = Buffer.from([0x66, 0x4C, 0x61, 0x43]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .flac files in Go
func IsFLAC(data []byte) bool {
signature := []byte{0x66, 0x4C, 0x61, 0x43}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/flac
curl https://filesignature.org/api/v1/flac
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .flac file?
A .flac file is a Free Lossless Audio Codec file file. Free Lossless Audio Codec file
What are the magic bytes for .flac files?
The magic bytes for Free Lossless Audio Codec file files are 66 4C 61 43 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .flac file?
To validate a .flac file, read the first bytes of the file and compare them against the known magic bytes (66 4C 61 43) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .flac files?
The primary MIME type for .flac files is audio/flac. Additional MIME types include: audio/flac, audio/x-flac.
Is it safe to open .flac files?
Free Lossless Audio Codec file (.flac) 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.