# Convert Audio - MP3/WAV/AAC/FLAC/OGG Converter Online

> Free online audio converter: convert between MP3, WAV, M4A, AAC, FLAC, OGG and OPUS with selectable bitrate. Powered by FFmpeg, processed locally, no upload.

- URL: https://qilingtools.com/en/audio/convert
- Category: Audio Tools (https://qilingtools.com/en/audio)
- Tags: [Audio](https://qilingtools.com/en/tags/audio), [Converters](https://qilingtools.com/en/tags/convert)
- Last updated: 2026-10-29
- Price: Free, no sign-up
- Privacy: Runs locally in the browser; files are never uploaded

Convert between common audio formats: MP3, WAV, M4A/AAC, FLAC, OGG and OPUS. You can also drop in a video file to extract its audio. FFmpeg runs inside your browser; nothing is uploaded.

## How to use

1. Select audio (or video) files
2. Choose the target format and bitrate
3. Click start, wait for processing and download

## Features

- MP3 / WAV / M4A / FLAC / OGG / OPUS
- Selectable bitrate
- Video files convert straight to audio
- FFmpeg runs locally

## FAQ

### Why does the first run take a moment?

The first use downloads the FFmpeg engine (about 30 MB) into the browser cache; later runs skip the download.

### Which format sounds best?

WAV and FLAC are lossless with the best quality but large files; MP3 at 320 kbps or AAC at 256 kbps is enough for almost every use.

### Are my files uploaded to a server?

No. Everything runs locally in your browser via WebAssembly. Files never leave your computer and are discarded when you close the page.

### Do I need to sign up or pay?

No. The site is completely free, requires no account, has no usage limits and adds no watermarks.

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