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Audio Converter

Convert audio files online to MP3, WAV, M4A, FLAC, OGG and more. Drop a file, pick the format and download it.

Drop an audio or video file here or click to browse
Select an audio file to convert (up to 100 MB)
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Converts audio, or the sound of a video, to MP3, WAV, M4A, AAC, FLAC, OGG, WMA, AIFF or MP2. Files up to 100 MB, 10 conversions a day.
Your file is converted on our server and deleted 30 minutes after the result is ready.

Convert audio to MP3, WAV, M4A, FLAC and more

This audio converter turns an audio file into MP3, WAV, M4A, AAC, FLAC, OGG, WMA, AIFF or MP2. It also takes video files (MP4, MOV, MKV, WebM, M4V): from a video it keeps the sound of the first audio track and drops the picture. Pick the Output format and download the result.

It is a free audio file converter: no signup, files up to 100 MB and 10 conversions a day. The file is converted on the server and deleted 30 minutes after the result is ready.

Which output format to choose

Each format has its own encoder. Only the lossy ones have a Quality menu.

Output formatEncoderQuality menu
MP3 Default LAME Yes
M4A, AAC AAC Yes
OGG Vorbis Yes
WMA WMA v2 Yes
WAV, AIFF 16-bit PCM No, lossless
FLAC FLAC No, lossless

MP2 is also available and follows the Quality menu. CD audio runs at 1,411 kbps, about 10.6 MB per minute, which is why WAV files are large; FLAC files are typically about half to two thirds of the WAV size. Converting an MP3 or AAC to WAV or FLAC makes it bigger but cannot bring back what was lost. Which codec does what is in what is a codec.

How to set Quality for MP3 and other lossy formats

Quality applies to MP3, M4A, AAC, OGG, WMA and MP2. The size is per minute of audio:

QualitySize per minute
Economy (64 kbps) About 0.5 MB
Standard (128 kbps) About 1 MB
Good (192 kbps) Default About 1.4 MB
Best (320 kbps) About 2.4 MB

A 128 kbps MP3 is about 11 times smaller than CD audio. More on the maths in audio file size.

MP4 to MP3: convert a video to MP3

Drop the MP4 as you would a song. The converter reads the first audio track of the video, keeps its sound and drops the picture, so a lecture, interview or music video becomes an MP3 you can play anywhere. MOV, MKV, WebM and M4V work the same way, and the Output format can be any of the nine, not only MP3.

This page extracts sound only. To change the video itself, for example MKV to MP4, use the video converter, and to make a video file smaller, the MP4 compressor.

M4A, WAV, OGG or FLAC to MP3, and MP3 to WAV

  • You have

    An M4A that your player or app will not open (M4A to MP3).

    Do this

    Set Output format to MP3 and keep Good (192 kbps). What the format is: what is an M4A file.

  • You have

    A large WAV you want to send or store (WAV to MP3).

    Do this

    Choose MP3. Standard (128 kbps) is about 11 times smaller than CD audio; Good (192 kbps) keeps more detail.

  • You have

    An MP3 that an editor or older hardware wants as WAV (MP3 to WAV).

    Do this

    Choose WAV. It is 16-bit PCM with no Quality menu. The file gets much bigger, but the sound stays what the MP3 already had.

  • You have

    An OGG file that will not play on your device (OGG to MP3).

    Do this

    Choose MP3 for the widest support. OGG is usually Vorbis audio, so this is a second lossy encode: pick Good or Best.

  • You have

    A FLAC library that is too big for your phone (FLAC to MP3).

    Do this

    Choose MP3 at Good (192 kbps) or Best (320 kbps). You give up the lossless copy, so keep the FLAC files.

How to convert an audio file

  1. Drop the file

    Add an audio file or a video up to 100 MB, or click the dropzone to browse.

  2. Pick format and quality

    Choose the Output format, then a Quality if the format is lossy.

  3. Convert and download

    Click Convert Audio and download the file within 30 minutes, before it is deleted.

Audio converter questions

Yes. There is no signup: 10 conversions a day, files up to 100 MB, and the result is deleted 30 minutes after it is ready.

Yes. Drop the MP4, MOV, MKV, WebM or M4V file and keep MP3 as the Output format. You get the sound of the first audio track, without the picture.

A little, because MP3 is a lossy format; the higher Quality settings keep more of the sound. Converting an MP3 or AAC file to WAV or FLAC does not restore anything and only makes the file bigger.

No. The Output format list is MP3, WAV, M4A, AAC, FLAC, OGG, WMA, AIFF and MP2. What the codec is: what is the Opus codec.