Runs in your browser — nothing is uploaded
MP3 export isn’t offered: M4A/AAC plays wherever MP3 does at the same size, and WAV/FLAC are lossless. MP3 files open fine as input.
Result
How to use Audio Converter
Change format, sample rate or channels — and even out the volume.
- Choose or drop a file (it stays on this device).
- Adjust the settings.
- Press Convert and follow the progress.
- Preview the result and download it.
Questions
Is my file uploaded?
No. Files are read, decoded and encoded by your browser (WebCodecs and Web Audio). Nothing is sent to a server, so private recordings stay private.
Which browsers work?
Current Chrome, Edge, Safari and Firefox. Formats a browser cannot encode are marked “not available” in the menus instead of failing halfway.
Can I export MP3?
MP3 files open as input, but export is to M4A (AAC), Opus, WAV or FLAC. M4A plays wherever MP3 does at the same size, and WAV/FLAC keep full quality.