Convert audio files online


(It must be a valid sample rate value that target format supports.)
Conversion Results:
# Output File Source File Action

NEW! Download Audio Converter for Android to convert audio files on your phone offline.

Steps:

1. Click "FILE" or "URL" button to switch local file or online file. Click "Choose file" button to select a file on your computer or enter an online file URL. The source file can also be video format. Video and audio file size can be up to 200M.

2. Choose target audio format. The target audio format can be WAV, WMA, MP3, OGG, AAC, AU, FLAC, M4A, MKA, AIFF, OPUS or RA.

3. Click "Convert Now!" button to start conversion. It will automatically retry another server if one failed, please be patient while converting. The output files will be listed in the "Conversion Results" section. Click icon to show file QR code or save file to online storage services such as Google Drive or Dropbox.

Compare M4A with MP3:
Name M4A MP3
Full name Audio-only MPEG-4 MPEG-1 or MPEG-2 Audio Layer III
File extension .m4a .mp3
MIME video/mp4 audio/mpeg, audio/MPA, audio/mpa-robust
Developed by International Organization for Standardization Fraunhofer Institute
Type of format Media container Digital audio
Introduction MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. M4A stands for MPEG 4 Audio and is a filename extension used to represent audio files. MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.
Technical details Audio-only MPEG-4 files generally have a .m4a extension. This is especially true of non-protected content. M4A is often compressed using AAC encoding (lossy), but can also be in Apple Lossless format. The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source.
Associated programs Windows Media Player, RealPlayer, MPlayer, Media Player Classic, VLC Media Player, K-Multimedia Player VLC media player, MPlayer, Winamp, foobar2000.
Sample file sample.m4a sample.mp3
Wiki M4A on Wikipedia MP3 on Wikipedia