Video & Audio
Audio Converter
Convert sound files to M4A, WAV or OGG, up to 5 at a time. No upload, no signup.
Files stay on your device How it works
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MP3, M4A, AAC, WAV, OGG, FLAC or WebM · up to 5 files, 25 MB each
Your files
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How to convert audio files
- Choose up to 5 sound files, MP3, M4A, AAC, WAV, OGG, FLAC or WebM, each up to 25 MB and 30 minutes long.
- Pick the format to make and, for M4A or OGG, the bitrate.
- Press Convert, then download each file, or all of them together as a ZIP: podcast-episode.mp3 becomes podcast-episode.m4a.
The formats
- M4A (AAC): plays on iPhones, Android phones, Macs and Windows PCs, so it suits sharing and music apps.
- WAV: uncompressed 16-bit sound, for editing apps that ask for it. It takes about 10 MB a minute, so WAV files here can be up to 10 minutes long.
- OGG (Opus): Opus was designed for both speech and music; browsers and VLC play it.
How the conversion works
Your browser’s own decoder reads the sound, and its own encoder writes the new file. It opens MP3, M4A, AAC, WAV, OGG with Opus or Vorbis sound, FLAC, and the sound of a WebM file. Converting from one compressed format to another loses a little detail, so start from the best copy you have: FLAC and WAV hold sound without loss. Each result shows its new size, its length and the sound format inside, so you can compare it with the original in your file list before you download.
Why there’s no MP3
Browsers can’t make MP3 files themselves. The add-on MP3 encoders available for browsers are built on LAME, and its license, the LGPL, isn’t one this site uses in its tools. M4A does the same job: it plays on iPhones, Android phones, Macs and Windows PCs.
Which browsers work
Current Chrome and Edge make all three formats. Firefox can’t make M4A (AAC), so choose WAV or OGG there. Safari needs version 26 or later to convert sound; on an iPhone or iPad, that means iOS 26 or later. A browser that can’t convert sound says so as the page opens, before you choose a file.
Good to know
Your files stay on your device: the conversion runs in your browser, and nothing is uploaded. Each copy keeps its name with the new extension, and a file the tool can’t read gets a note saying why, while the others still convert. To cut a file down without converting it, use Trim Audio; to take the sound out of a video, use MP4 to M4A.