Is Audio to MP3 free? Is there a watermark?

Yes — Audio to MP3 is free to use with no sign-up or watermark. Very large files can still be limited by your browser's available memory and processing resources.

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. Actual codec support depends on what the bundled engine or browser decoder can read.

Will I lose quality converting to MP3?

MP3 encoding is lossy. A higher output bitrate can preserve more of a strong source, but it cannot restore detail already removed upstream.

Free tools · Convert

Audio to MP3

Convert WAV, M4A, AAC, OGG, or FLAC audio into a widely supported MP3 at the bitrate you choose. Runs locally in your browser with no upload or 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

Get a better result

Best for: WAV, M4A, AAC, OGG, or FLAC audio that needs broad playback support in a simple MP3 delivery file.
Input → output: The selected audio becomes MP3 at 128, 192, or 320 kbps through the LAME encoder. Video is not part of this workflow.
Quality tip: Use 192 kbps for general listening and 320 kbps only when the source quality warrants it. Speech often remains clear at 128 kbps.
Know before running: MP3 encoding is lossy, and increasing the output bitrate cannot restore detail already removed from a compressed source. Tags, artwork, and alternate streams are not deliberately copied.
Next step: Compress audio when attachment size matters more than retaining the selected MP3 bitrate.

How to use Audio to MP3

1
Choose your file. Drop a supported WAV, M4A, AAC, OGG, FLAC file into the tool, or click to select one. It stays on your device — nothing is uploaded.
2
Pick your settings. Adjust the available options, then press Run. The first processing run loads the browser engine before conversion begins.
3
Download. Review the result, then download the finished file from your browser with no watermark.

Frequently asked questions

Is Audio to MP3 free? Is there a watermark?: Yes — Audio to MP3 is free to use with no sign-up or watermark. Very large files can still be limited by your browser's available memory and processing resources.
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. Actual codec support depends on what the bundled engine or browser decoder can read.
Will I lose quality converting to MP3?: MP3 encoding is lossy. A higher output bitrate can preserve more of a strong source, but it cannot restore detail already removed upstream.