---
title: "WAV to MP3 Converter — Free, Private, Local | Compress Pro"
description: "Convert WAV audio to MP3 in your browser — typically 10× smaller with no audible difference. Pick the bitrate, keep the file on your device. Free forever."
canonical: https://compress-pro.com/wav-to-mp3
---

# Convert WAV to MP3.

> Turn huge WAV recordings into small MP3s, in your browser.

WAV stores raw samples; MP3 keeps what you can hear. At 192 kbps the MP3 is about a tenth of the WAV with no audible difference — and **the conversion never leaves your machine**.

**No uploads · No ads · Free & open source.**

## How it works

1. Drop files anywhere on the page, click to browse, or paste with Ctrl/⌘ + V.
2. Pick a quality or preset — or set an exact target size and let the tool find it.
3. Compress, compare before/after, and download — individually or as a ZIP.

## Pick a bitrate

MP3 size is pure arithmetic — bitrate times duration — so choosing a bitrate is choosing a file size:

| Content | Bitrate | An hour of audio |
| --- | --- | --- |
| Voice, interviews, lectures | 96–128 kbps | ≈ 45–60 MB |
| Music, everyday listening | 192 kbps | ≈ 85 MB |
| Music, near-archival | 256–320 kbps | ≈ 115–140 MB |

## When to keep the WAV

Keep the WAV as the master whenever editing lies ahead — every MP3 re-encode loses a little, so cut and mix in WAV, then export MP3 once at the end. For listening and sharing, the MP3 is the file to send; if it must also hit an exact size, the [audio tool](https://compress-pro.com/compress-audio) can aim at a target size instead of a bitrate.

## Frequently asked questions

### How much smaller does it get?

A stereo WAV is ~1.4 Mbps; a 192 kbps MP3 is about 7× smaller, a 128 kbps one about 11× smaller. An hour of WAV (~600 MB) becomes roughly 60–85 MB.

### Will I hear the difference?

At 192 kbps and above, almost certainly not — in listening tests, that is the level where people stop telling the difference for music. Keep the WAV as an archival master if you plan to edit later; re-encoding MP3s repeatedly does degrade.

### Can I convert many WAV files at once?

Yes — drop the whole batch and each file is encoded on your device, then download the results individually or as one ZIP. There are no daily caps and no file limits.

### Is it private?

Yes. The audio is decoded and re-encoded entirely in your browser — recordings never leave your device, and the server does nothing but deliver this page. Voice memos, interviews, demos: none of it is uploaded anywhere. Want proof? Run one file through, switch your connection off, and run another — it still works.

## Related tools

- [Compress & Convert audio](https://compress-pro.com/compress-audio)
- [Convert MP4 to MP3](https://compress-pro.com/mp4-to-mp3)
- [Convert M4A to MP3](https://compress-pro.com/m4a-to-mp3)
- [Convert MP3 to WAV](https://compress-pro.com/mp3-to-wav)

---

Part of [Compress Pro](https://compress-pro.com/) — every tool page has a markdown twin at `<page url>.md`. Full tool index: [llms.txt](https://compress-pro.com/llms.txt)