Convert ATRAC3 audio files (AT3) online for free
The converter easily converts your AT3 audio files to various formats - free and online. No SonicStage or or other Audio software needed.
To convert other file formats to the "Sony ATRAC3 Audio" file type, you need software like SonicStage or a similar tool.
The .at3 file is an ATRAC3 (Adaptive Transform Acoustic Coding 3) audio file developed by Sony. It is built on a RIFF container and was heavily utilized for audio compression in legacy Sony hardware, including the PlayStation Portable (PSP), PlayStation 3, and MiniDisc players.
To play these files natively, users previously relied on obsolete software like SonicStage or the ATRAC3plus Decoder. Today, versatile media players like VLC media player or Foobar2000 can sometimes open them, though they may require specialized plugins.
The .at3 format is highly proprietary and presents significant compatibility challenges today. It is not supported by standard web browsers, modern smartphones, or mainstream audio editing software. Sending an .at3 file to someone almost guarantees they will not be able to open it without installing third-party decoders.
For universal compatibility on mobile devices and the web, convert .at3 files to MP3 or AAC. For audio editing or archiving, convert to an uncompressed WAV file to prevent further quality loss. Be aware that converting to another lossy format like MP3 may slightly degrade audio fidelity, and game-specific loop points may be discarded. Drop your file here to view and convert it securely right in your browser.
Use Convert.Guru to open and convert your AT3 file.
Users also converted MP3, WAV, AT3A, M4A, PMF, AC3, AT9, PAM, GTA, FLAC, MP4, BIN and RAW files.
If you want to convert AT3 file to M4A, ALAC or APE, you can use SonicStage or similar software from the "Compressed Audio Storage" category. In the File menu, look for Save As… or Export….
To convert MIDI, AAC, TTA, AU, WV, DTS, MID, FLAC, RA, MP3, PCM or WAV files to AT3, try SonicStage or another comparable tool in the "Compressed Audio Storage" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our AT3 converter.