Convert an audio file
Convert audio files between MP3, M4A, WAV, OGG, FLAC and AAC, several at once, with the quality you choose. Free, in your browser, no upload.
- Free
- No sign-up
- No file uploaded
- Windows, Mac, Android, iPhone
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About this tool
An iPhone M4A your car won't play, a WAV too big for an email, a FLAC to put on your phone? Drop your files, choose the format and quality: conversion happens on your device, file by file.
When to use it
Play anywhere
MP3 plays on every phone, car, speaker and app.
Make a file smaller
An MP3 is about ten times smaller than a WAV for similar listening quality.
Prepare for editing
Lossless WAV suits editing and mixing software.
How to use
- Choose the output format and quality.
- Drop one or more audio files or videos.
- Wait for the conversion.
- Download the converted files.
How it works
The file is decoded in your browser with the Mediabunny library, then re-encoded in the chosen format: MP3 with the LAME encoder, AAC and M4A with the browser's encoder or a built-in one, FLAC and WAV losslessly.
Nothing is uploaded: your files stay on your device, however many or large they are.
Tips for best results
- 192 kbps is enough for music; 128 kbps for voice.
- Keep the original: each conversion to a compressed format loses a little quality.
- To cut a section, use “Cut audio”.
- To get the sound from a video, drop the video directly.
Common problems and fixes
The file isn't read
Some rare or protected (DRM) formats can't be read: try a recent browser.
Conversion is slow
Long files take longer on a phone: use a computer if you can.
The converted file is bigger
A WAV or FLAC is bigger than an MP3: that's normal for a lossless format.
Frequently asked questions
Are my files uploaded?
No, conversion happens in your browser.
Can I convert several files?
Yes, drop them together: they're converted one after another.
Is quality preserved?
It depends on the bitrate; a lossless format doesn't restore quality already lost.
Are videos accepted?
Yes, only their sound is converted.
Related searches
Still stuck?
Ask on the forum: the category, the tool, your device sheet and the test result will be filled in for you.