Browse all MIME types

audio/x-flac

FLAC preserves audio fidelity while shrinking file size, making it popular in archival libraries and high-quality distribution.

audio
Usually already encoded

Content-Type header

Content-Type: audio/x-flac
Common extensions
.flac

How teams usually encounter it

This page maps the media type to the file extensions and delivery behaviors developers usually care about: browser parsing, upload validation, cache correctness, and asset handling.

Compression signal

audio/x-flac is usually already compressed or stored in a binary-heavy format, so extra transfer compression tends to help less.

Server config snippets

Use these when a server is missing the right extension-to-MIME mapping or you want the expected header to survive a proxy, CDN, or custom asset bucket setup.

Nginx
types {
  audio/x-flac flac;
}
Apache
AddType audio/x-flac .flac

Magic bytes / file signature

When you need to validate uploads or investigate a mislabeled file, the signature often starts with 66 4C 61 43.

Operational shortcut

If a browser downloads this asset instead of rendering it correctly, check the response header first, then verify the extension mapping on your origin and edge cache. .flac is the fastest sanity check for teammates reviewing the file outside the app.

Related audio types