---
title: "Free Audio Converter: MP3, M4A and WAV in Your Browser"
description: "Convert audio or video files to MP3, M4A or WAV on your own device. Nothing is uploaded, there is no sign-up, and you choose the bitrate."
canonical: https://toolsugar.com/tools/audio-converter
image: https://toolsugar.com/og.png
---

# Audio Converter

This audio converter turns audio and video files into MP3, M4A or WAV inside your browser, using ffmpeg compiled to WebAssembly. Files are never uploaded. The first run downloads a 32 MB engine from a public CDN, then your device does the work. It handles one file at a time, and DRM protected WMA files are not supported.

Runs on your device

## How it works

1. Choose an audio or video file from your device.
2. Pick MP3, M4A or WAV as the output.
3. For MP3 or M4A, pick a bitrate from 64 to 320 kbps.
4. Press convert and download the new file.

## Key facts

- **Outputs**: MP3, M4A (AAC) and WAV (16-bit PCM).
- **Inputs we test**: MP4, MOV, WebM, MKV, AVI, M4A, WAV, FLAC, OGG, Opus, AAC, narrowband AMR, WMA 2 and MP3.
- **Surround sound**: 5.1 tracks are folded down to stereo when the output is MP3.
- **Privacy**: The first run downloads a 32 MB engine from a public CDN. Your file is never sent anywhere.

## Common uses

- Getting an odd format to play in a car stereo or an old music player.
- Preparing a WAV for an editor that refuses compressed audio.
- Moving a recording into M4A for an Apple device.

## Questions

### Does converting improve the sound?

No. A conversion cannot restore detail the source lost. A higher bitrate only avoids losing more, so 320 kbps from a 64 kbps source just makes a bigger file.

### Can I convert many files at once?

Not yet. The tool works on one file at a time, so a folder needs one run per file.

### Which track is used if a file has several?

The first audio track. There is no track picker, so a film with several languages gives you whichever language comes first.

[Read the Audio Converter guide](https://toolsugar.com/blog/how-to-convert-audio-files)

## Related tools

- [Compress Audio](https://toolsugar.com/tools/compress-audio)
- [Extract Audio](https://toolsugar.com/tools/audio-extractor)
- [Audio Cutter](https://toolsugar.com/tools/audio-cutter)
- [MP3 to WAV](https://toolsugar.com/tools/mp3-to-wav)