.flac MIME type
FLAC audioaudio
audio/flacLossless compressed audio, supported by current browsers.
| MIME type | audio/flac |
|---|---|
| Extensions | .flac |
| Also seen as | audio/x-flac |
| Content-Type | audio/flac |
| Compress in transit? | No — already compressed |
| File signature | 66 4C 61 43 (fLaC) |
Good to know
- Roughly half the size of WAV with identical audio.
Serve .flac files with the right type
The response header to send:
Content-Type: audio/flac
Most servers pick the type from the file extension. If yours sends the wrong one, map it explicitly:
nginx (inside the types block in mime.types)
audio/flac flac;
Apache (.htaccess or server config)
AddType audio/flac .flac
Express
res.set("Content-Type", "audio/flac");Python
import mimetypes
mimetypes.add_type("audio/flac", ".flac")HTML file input
<input type="file" accept=".flac,audio/flac">
Check it
See what a server sends for a file, and what type a local file really is by its contents:
curl -sI https://example.com/file.flac | grep -i '^content-type:' file --mime-type file.flac
Frequently asked questions
What is the MIME type for .flac files?
audio/flac. You may also see audio/x-flac, but audio/flac is the one to send.
What Content-Type header should a .flac file be served with?
Content-Type: audio/flac. It's already compressed, so servers shouldn't gzip it.
How can I tell if a file is really a .flac?
Check its bytes rather than the extension: FLAC files start with 66 4C 61 43 (fLaC). On the command line, file --mime-type name.flac does this for you.
Related types
Headers that go with it: Content-Type · Content-Disposition · X-Content-Type-Options