Click the "Select File" button above, and choose your AT3 file.
You'll see a preview.
Click the "Convert file to..." button to save your file in the format you want.
Convert AT3 to another file type
The converter easily converts your AT3 file to various formats - free and online. No Media Player or extra software needed.
AT3 to MP3
AT3 to WAV
AT3 to AAC
AT3 to FLAC
AT3 to OGG
AT3 to WMA
AT3 to AIFF
AT3 to OPUS
AT3 to WV
Convert a file to AT3
The converter also works in reverse, so you can convert other Audio formats to AT3 with high quality output.
About AT3 files
The .AT3 file extension represents audio data compressed using ATRAC3 (Adaptive TRansform Acoustic Coding 3), a proprietary technology developed by Sony Corporation. Originally designed for MiniDisc players and later widely adopted in the PlayStation Portable (PSP) and PS3 ecosystems, this format offers high compression ratios to save storage space on older media. While efficient for Sony devices, .AT3 files pose significant challenges for modern users: they are largely incompatible with standard media players like Windows Media Player, QuickTime, or mobile operating systems (iOS/Android) without specific codecs. Furthermore, older management software like Sony SonicStage is discontinued and difficult to run on modern Windows 11 or macOS environments. To make these recordings accessible, users must typically convert them. For general listening on smartphones, converting to MP3 or AAC is ideal. For editing or archiving game audio, converting to WAV or FLAC ensures no additional quality loss occurs during the transfer. Our online tools at convert.guru allow you to bypass the need for obsolete Sony drivers and instantly migrate your audio to a usable format.
Use Convert.Guru to open and convert your AT3 file.
If you want to convert AT3 file to M4A, ALAC or APE, you can use VLC media player or similar software from the "Sony Compressed Audio" 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 VLC media player or another comparable tool in the "Sony Compressed Audio" category.
The AT3 Converter Story
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.