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FLAC allows third-party applications to register an ID for use with FLAC APPLICATION metadata blocks. Use the following form to request an ID, or to submit a change to an existing ID.

* Application ID:
* Application name:
* Contact e-mail:
Application URL:
Specification URL:
(* = mandatory)

The ID request should be 8 hexadecimal digits and not conflict with any existing IDs (see the table below for all currently registered IDs). This 32-bit number will be stored big-endian in the block.

Information about your application (but not your e-mail address) will show up on this page in the ID directory. You can also provide a URL to your application and a URL reference to the specification of your application's APPLICATION block.

You will be notified via e-mail about your submission.

id directory
Here is a list of all registered IDs and their applications:

ID Application
41544348 - "ATCH" FlacFile
43756573 - "Cues" GoldWave cue points (specification)
4D754D4C - "MuML" MusicML: Music Metadata Language
46696361 - "Fica" CUE Splitter
46746F6C - "Ftol" flac-tools
4D505345 - "MPSE" MP3 Stream Editor
52494646 - "RIFF" Sound Devices RIFF chunk storage
5346464C - "SFFL" Sound Font FLAC
534F4E59 - "SONY" Sony Creative Software
5351455A - "SQEZ" flacsqueeze
61696666 - "aiff" FLAC AIFF chunk storage
7065656D - "peem" Parseable Embedded Extensible Metadata (specification)
71667374 - "qfst" QFLAC Studio
72696666 - "riff" FLAC RIFF chunk storage
74756E65 - "tune" TagTuner
77363420 - "w64 " FLAC Wave64 chunk storage
78626174 - "xbat" XBAT
786D6364 - "xmcd" xmcd