Audio Conversion
Convert audio formats
- Files never leave your device
- Runs in your browser
- Free, no sign-up, no watermark
Drop audio or video files here, or click to choose
Accepts MP3, WAV, M4A, AAC, OGG, OPUS, FLAC, AIFF, WebM, and the audio of MP4, MOV, MKV videos · You can also paste with Ctrl+V / ⌘V
How to use Audio Conversion
Convert audio to MP3, M4A, OGG, WAV or FLAC in your browser, several files at a time, or save the soundtrack of MP4, MOV and MKV videos. When the codec already matches, the audio is copied without re-encoding, so there is no quality loss.
- 1
Drop audio or video files on the page: MP3, WAV, M4A, AAC, OGG, OPUS, FLAC, AIFF, WebM, or videos such as MP4, MOV and MKV.
- 2
Under Convert to, pick a Format and Bitrate; for M4A you can switch File type to .aac, and for OGG to .opus or .webm.
- 3
In Advanced, set a Custom bitrate (32–320 kbps), Sample rate or Channels if needed, and leave Copy when the codec already matches and Keep tags and cover art on.
- 4
Click the Convert button, then Download, or Download all (ZIP) when you converted several files.
Frequently asked questions
Are my files uploaded?
No. Decoding and encoding run in your browser, and the files never leave your device.
Which format should I choose?
MP3 plays everywhere and 192 kbps sounds transparent to most ears. M4A (AAC) is smaller than MP3 at the same quality and is what Apple devices use, OGG uses Opus and is the most efficient for voice and the web, WAV is uncompressed for editing, and FLAC is lossless at about half the size of WAV.
When is the audio copied instead of re-encoded?
When Copy when the codec already matches is on, the source already uses the target codec, and you keep the original sample rate and channels, for example AAC from an MP4 video to M4A, or MP3 to MP3. Those files are marked copied, lossless and finish almost instantly.
Does converting MP3 to WAV or FLAC improve the sound?
No. A lossless format keeps exactly what the source contains, but detail removed by the MP3 encoder cannot be restored. The file only gets larger.
Are the title, artist and cover art kept?
Yes, with Keep tags and cover art on: title, artist, album, track number and cover are carried over where the output format allows. Turn it off to save the audio without tags.
What happens with WMA or other files my browser cannot decode?
They are converted with ffmpeg instead. The ffmpeg engine is downloaded once (about 32 MB) and is slower, but it still runs on your device.