Free Audio Converter

Guide & FAQ
Drop audio files here, or click to choose MP3, WAV, M4A, AAC, OGG, FLAC, Opus and more. Convert one or many. Free, no signup.

Guide: Free Audio Converter

How to convert audio

Drop one or more audio files on the page, or click to choose them. Select the output format, adjust the quality if you want, and press Convert. Each finished file appears with a player so you can check it before you download.

Settings explained

  • Bitrate sets the quality and file size of MP3, M4A and OGG. Higher means better sound and a bigger file.
  • Sample rate: keep the original unless a device needs a specific value; 44100 Hz suits most music, 48000 Hz suits video, 16000 Hz is enough for voice notes.
  • Mono halves the size and is fine for speech.

Which format is best?

MP3 plays on virtually every device. M4A gives better quality per size and is the Apple default. OGG Opus is excellent for speech and the web. WAV is uncompressed and ideal for editing, but large.

Private and free

All conversion happens in your browser, so there is no upload, no account and no daily limit. Very large files are limited only by your device memory.

FAQ

Which formats can I convert from?

Anything your browser can play: MP3, WAV, M4A, AAC, OGG, Opus, FLAC and the sound of MP4 or WebM video. Support varies a little between browsers; Chrome, Edge, Firefox and Safari all read the common ones.

Which formats can I convert to?

MP3 and WAV everywhere, M4A (AAC) in current Chrome, Edge and Safari, and OGG (Opus, 48 kHz) in browsers that include the Opus encoder. Options your browser cannot make are flagged with a clear message.

What bitrate should I choose?

For MP3, 128 kbps is fine for speech and everyday listening, 192 kbps for music, and 320 kbps for the highest quality. Converting from a lossy file to a higher bitrate cannot add quality that is not there.

Can I convert many files at once?

Yes. Add several files, choose one output format, and press Convert. Each result gets its own player and download button.

Does converting reduce quality?

Converting between two lossy formats, for example M4A to MP3, adds a small extra loss. Use a high bitrate when quality matters, or convert to WAV for editing.

Are my files uploaded?

No. Files are decoded and encoded by your browser. The tool makes no upload requests.

Open-source licences

  • lamejs (LAME MP3 encoder, JavaScript port): LGPL-3.0