Is Audio to MP3 free? Is there a watermark?

Yes — Audio to MP3 is completely free, with no sign-up, no watermark, and no limit on how many files you process.

Do my files get uploaded to a server?

No. Audio to MP3 runs entirely in your browser with WebAssembly, so your WAV, M4A, AAC, OGG, FLAC file never leaves your device and nothing is stored or seen by us.

What can I put in, and what do I get out?

Audio to MP3 accepts WAV, M4A, AAC, OGG, FLAC and gives you back a MP3 file. You can also set quality before you run it.

Will I lose quality converting to MP3?

No noticeable loss for most files — Audio to MP3 uses high-quality settings (a two-pass colour palette for GIFs, H.264 at a visually-lossless quality for video), so the result stays crisp.

Free tools · Convert

Audio to MP3

Convert almost any audio file — WAV, M4A, AAC, OGG, or FLAC — into a universal MP3 at the bitrate you choose. Runs locally in your browser, no upload and no watermark.

Runs entirely in your browser. Your file is never uploaded — no watermark, no account.

Drop a file or click to chooseWAV, M4A, AAC, OGG, FLAC

How to use Audio to MP3

1
Choose your file. Drop a file into the tool, or click to select one. It stays on your device — nothing is uploaded.
2
Pick your settings. Adjust the options if you like, then press Run. The first run downloads a ~32 MB engine once; after that it's instant.
3
Download. Everything is processed right in your browser — download the finished file instantly, with no watermark.

Frequently asked questions

Is Audio to MP3 free? Is there a watermark?: Yes — Audio to MP3 is completely free, with no sign-up, no watermark, and no limit on how many files you process.
Do my files get uploaded to a server?: No. Audio to MP3 runs entirely in your browser with WebAssembly, so your WAV, M4A, AAC, OGG, FLAC file never leaves your device and nothing is stored or seen by us.
What can I put in, and what do I get out?: Audio to MP3 accepts WAV, M4A, AAC, OGG, FLAC and gives you back a MP3 file. You can also set quality before you run it.
Will I lose quality converting to MP3?: No noticeable loss for most files — Audio to MP3 uses high-quality settings (a two-pass colour palette for GIFs, H.264 at a visually-lossless quality for video), so the result stays crisp.