How to convert audio
- Drop an audio or video file onto the box or choose one from your device.
- Pick the format you want: MP3, WAV, OGG, FLAC, or M4A.
- For MP3, OGG, and M4A choose a bitrate. Higher means better sound and a bigger file.
- Press Convert and download the result.
MP3 plays everywhere. M4A (AAC) is a little smaller at the same quality. WAV and FLAC keep every detail of the source, and FLAC files are about half the size of WAV.
Supported conversions
One tool covers all of these. Audio to audio: MP3 to WAV, MP3 to OGG, MP3 to FLAC, MP3 to M4A, WAV to MP3, WAV to OGG, WAV to FLAC, WAV to M4A, OGG to MP3, OGG to WAV, OGG to FLAC, OGG to M4A, FLAC to MP3, FLAC to WAV, FLAC to OGG, FLAC to M4A, M4A to MP3, M4A to WAV, M4A to OGG, M4A to FLAC, AAC to MP3, AAC to WAV, AAC to OGG, AAC to FLAC, AAC to M4A, Opus to MP3, Opus to WAV, Opus to OGG, Opus to FLAC, Opus to M4A. Video to audio: MP4 to MP3, MP4 to WAV, MP4 to OGG, MP4 to FLAC, MP4 to M4A, MOV to MP3, MOV to WAV, MOV to OGG, MOV to FLAC, MOV to M4A, MKV to MP3, MKV to WAV, MKV to OGG, MKV to FLAC, MKV to M4A, WebM to MP3, WebM to WAV, WebM to OGG, WebM to FLAC, WebM to M4A. Use it as a general video to MP3 converter, or to turn an MP4 into WAV, M4A to MP3, or FLAC to MP3 for a player that does not support the original format.
Questions
Are my audio files uploaded?
No. Decoding and encoding happen inside this browser tab. Your files never leave your device.
Can I get the sound out of a video?
Yes. Choose an MP4, MOV, WebM, or MKV file and pick MP3, M4A, WAV, OGG, or FLAC. Only the audio is kept. If the video already holds AAC audio and you pick M4A with "Keep source quality", the sound is copied without any loss.
Which bitrate should I choose?
192 kbps sounds good for most music and 128 kbps is fine for speech and podcasts. 256 or 320 kbps is for careful listening. WAV and FLAC are lossless, so they have no bitrate. Converting a lossy file such as MP3 to FLAC or WAV does not bring back lost detail.
Which formats does it support?
It reads MP3, WAV, OGG, Opus, FLAC, M4A, AAC, and the sound in MP4, MOV, WebM, and MKV videos. It writes MP3, WAV, OGG (Opus), FLAC, and M4A (AAC). Files that use DRM or old codecs such as WMA are not supported.
Why does it say my browser is missing a feature?
The converter uses WebCodecs, which current versions of Chrome, Edge, Firefox, and Safari include. Older browsers do not have it, so update your browser and reload the page.
Credits
Built on Mediabunny (MPL-2.0), LAME MP3 encoder (via @mediabunny/mp3-encoder) (LGPL-2.0), FFmpeg AAC encoder (via @mediabunny/aac-encoder) (LGPL-2.1-or-later) and libFLAC (via @mediabunny/flac-encoder) (BSD-3-Clause). OneTooling is not affiliated with these projects.