---
title: "Compress Audio: Shrink MP3, WAV and M4A Files Free"
description: "Make audio files smaller on your own device with three clear size levels. You see the percent saved, and the file is never uploaded to a server."
canonical: https://toolsugar.com/tools/compress-audio
image: https://toolsugar.com/og.png
---

# Compress Audio

ToolSugar makes audio files smaller in your browser by re-encoding them at a lower bitrate, in MP3 or M4A. Choose 48 kbps mono, 96 kbps or 128 kbps. The result shows the percent saved, and says so plainly if a file did not shrink. Nothing is uploaded. The first run downloads a 32 MB engine from a public CDN.

Runs on your device

## How it works

1. Choose the audio or video file to shrink.
2. Pick MP3 or M4A.
3. Pick a size: Smallest, Balanced or Higher quality.
4. Compress, then check the reported saving before downloading.

## Key facts

- **Smallest**: 48 kbps mono, about 0.36 MB per minute. Made for speech.
- **Balanced**: 96 kbps stereo, about 0.72 MB per minute.
- **Higher quality**: 128 kbps stereo, about 0.96 MB per minute.
- **Honest result**: A file already below the chosen bitrate can grow, and the tool tells you when that happens.

## Common uses

- Getting a recording under an email or messaging size limit.
- Reducing a long podcast or lecture for a small phone.
- Fitting audio into a form with an upload cap.

## Questions

### Why did my file get bigger?

It was already compressed below the bitrate you chose, as AMR and voice notes often are. Keep the original in that case.

### Can I set an exact target size?

Not directly. Each level sets a bitrate, and the size per minute above lets you estimate the result.

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

## Related tools

- [Audio Converter](https://toolsugar.com/tools/audio-converter)
- [WAV to MP3](https://toolsugar.com/tools/wav-to-mp3)
- [Audio Cutter](https://toolsugar.com/tools/audio-cutter)
- [Noise Remover](https://toolsugar.com/tools/noise-remover)