Audiowave
Select target audio format, sample rate, and bitrate/bit depth. If conversion fails, try different sample rate or bitrate/bit depth.
Supported input formats: AAC, AC3, AIFF, AU, FLAC, M4A, MP3, OGG, OPUS, WAV.

Drag & drop audio files here or click to browse

Free Online Audio Format Converter | Convert MP3, WAV, FLAC, AAC, OGG & More

Free online audio format converter supporting 10 formats: AAC, AC3, AIFF, AU, FLAC, M4A, MP3, OGG, OPUS, WAV. Adjust sample rate and bitrate (or bit depth for WAV), batch process via drag-and-drop, preview before download, and save as ZIP archive. Powered by FFmpeg.wasm — 100% free, no signup, all processing stays in your browser.

Key Features

  • ✅ 10 audio formats supported – convert between AAC, AC3, AIFF, AU, FLAC, M4A, MP3, OGG, OPUS, WAV
  • ⚙️ Adjustable sample rate, bitrate, and bit depth for optimal quality output
  • 📂 Batch upload & convert – drag & drop multiple files at once
  • 🎧 Preview converted audio before downloading
  • 💾 Download single files or all as a ZIP archive
  • 🔒 100% private – no upload to server, all processing in your browser with FFmpeg.wasm

Supported Audio Formats & Parameters

MP3 (MPEG-1 Audio Layer 3)

Sample rates: 8k, 11.025k, 16k, 22.05k, 24k, 32k, 44.1k, 48k Hz | Bitrate: 64–320 kbps

AAC (Advanced Audio Coding)

Sample rates: 8k, 11.025k, 16k, 22.05k, 24k, 32k, 44.1k, 48k Hz | Bitrate: 64–320 kbps

AC3 (Dolby Digital)

Sample rates: 8k, 11.025k, 16k, 22.05k, 24k, 32k, 44.1k, 48k Hz | Bitrate: 128–640 kbps

AIFF (Audio Interchange File Format)

Sample rates: 8k–48k Hz (all options) | Bit depth: 16-bit (fixed)

AU (Sun Audio)

Sample rates: 8k, 11.025k, 16k, 22.05k, 24k, 32k, 44.1k, 48k Hz | Bit depth: 16-bit (fixed)

FLAC (Free Lossless Audio Codec)

Output sample rate: 44.1 kHz (fixed) | Compression level: 8 (highest)

M4A (MPEG-4 Audio)

Sample rates: 8k–48k Hz (all options) | Bitrate: Default 128 kbps (AAC), not adjustable in current version

OGG (Ogg Vorbis)

Sample rates: 8k–48k Hz (all options) | Bitrate: 64–500 kbps

Opus (Interactive Audio Codec)

Sample rates: 8k, 12k, 16k, 24k, 48k Hz | Bitrate: 32–510 kbps

WAV (Waveform Audio File Format)

Sample rates: 44.1k, 48k, 64k, 88.2k, 96k, 176.4k, 192k Hz | Bit depth: 16, 24, 32-bit

How to Use the Audio Converter – Step by Step

  • 1️⃣ Select target format – Choose from 10 output formats (MP3, WAV, FLAC, AAC, OGG, M4A, AC3, AIFF, AU, Opus).
  • 2️⃣ Adjust audio parameters – Set sample rate (8kHz–192kHz), bitrate (64–500kbps), or bit depth for WAV. Lower values reduce file size.
  • 3️⃣ Drag & drop files – Upload one or multiple audio files (batch conversion supported). Accepted: AAC, AC3, AIFF, AU, FLAC, M4A, MP3, OGG, OPUS, WAV.
  • 4️⃣ Automatic conversion – Files are processed sequentially via FFmpeg.wasm; progress is shown in the drop zone.
  • 5️⃣ Preview & download – Click the play button to preview converted audio, then download individually or use 'Download All' for a ZIP archive.
  • 6️⃣ Clear list – Use the 'Clear' button to remove all files and start a new batch.

Frequently Asked Questions

1. Is the audio converter really free?
Yes, it’s 100% free. No hidden fees, no signup required, no watermarks, no limits. Convert as many files as you want, any time.
2. Are my files uploaded to your server?
No. All conversion is done inside your browser using FFmpeg.wasm (WebAssembly). Your files never leave your device — privacy guaranteed, no server-side processing, no data storage of any kind.
3. Why does conversion fail sometimes (e.g., memory access error)?
This can happen when the chosen sample rate or bitrate is too high for the browser’s memory limit. Try lowering the sample rate (e.g., 44.1kHz → 24kHz) or bitrate.
4. Can I convert video files to audio?
This tool is designed for audio-to-audio conversion. For video to audio, please use our dedicated MP4 to MP3 converter.
5. What is the maximum file size?
Depends on your device’s available memory (RAM). For most modern computers, files up to 100 MB work well. Very long files may cause memory issues — consider splitting them or lowering the sample rate and bitrate to reduce memory usage.
6. Which browsers are supported?
Latest versions of Chrome, Firefox, Edge, and Safari are supported. For the best performance with large files, we recommend using Chrome or Edge (both Chromium-based).

Why Use Our Online Audio Converter?

This free online audio converter combines the power of FFmpeg.wasm with an intuitive drag-and-drop interface, giving you full control over audio quality via sample rate, bitrate, and bit depth settings. Whether you need to batch convert songs to MP3 for your car, create high-quality FLAC archives, transcode AAC to WAV for editing, or prepare OGG files for web use, our converter handles it all in your browser. No registration needed, no file uploads, no privacy concerns. Just fast, reliable, and free audio conversion.