Free Audio Converter — MP3, M4A, WAV, OGG, FLAC
Convert audio files between formats — a free alternative to Adobe Audition. No sign-up required.
5 Output Formats
Convert to MP3, M4A (AAC), WAV, OGG (Vorbis), or FLAC with configurable bitrate from 64 to 320 kbps.
Batch Conversion
Add multiple files and convert them all to the same format. Each file converts independently with its own progress and download.
Lossy & Lossless
Choose lossy (MP3, M4A, OGG) for smaller files or lossless (WAV, FLAC) for perfect quality. FLAC compresses without losing data.
100% Private
All processing happens in your browser using WebAssembly. Your files never leave your device — no uploads, no servers.
Free Audio Converter — Change Audio Formats Online
The Free Audio Converter lets you convert audio files between MP3, M4A (AAC), WAV, OGG (Vorbis), and FLAC directly in your browser. Whether you need to convert a single podcast episode or batch-convert an entire music library, drop your files in and download the results. No sign-up, no uploads, no file size limits.
Features
- 5 output formats — MP3, M4A (AAC), WAV, OGG (Vorbis), and FLAC cover lossy and lossless needs.
- Configurable bitrate — Choose from 64 to 320 kbps for lossy formats. Lossless formats preserve original quality.
- Batch conversion — Add multiple files and convert them all at once. Each file gets its own progress bar and download.
- Mix input formats — Convert from any format your browser can decode, including MP3, M4A, WAV, OGG, FLAC, AAC, and WebM.
- 100% client-side — Uses ffmpeg.wasm (WebAssembly). Your files never leave your device.
How to Convert Audio Files
- 1. Add files — Drag and drop audio files into the upload area, or click to browse. You can add files in multiple batches.
- 2. Choose format — Select your target format from the dropdown: MP3, M4A, WAV, OGG, or FLAC.
- 3. Set bitrate — For lossy formats, choose a bitrate (64-320 kbps). Lossless formats ignore this setting.
- 4. Convert — Click Convert and wait for processing. Each file shows its own progress bar.
- 5. Download — Click the download icon next to each file, or use Download All to grab everything at once.
Audio Format Comparison
| Format | Type | File Size | Best For |
|---|---|---|---|
| MP3 | Lossy | Small | Universal playback, sharing |
| M4A (AAC) | Lossy | Small | Apple devices, audiobooks, better quality than MP3 at same bitrate |
| OGG (Vorbis) | Lossy | Small | Open-source players, gaming, streaming |
| FLAC | Lossless | Medium | Archiving, audiophile playback, editing source files |
| WAV | Lossless | Large | Professional audio editing, maximum compatibility |
Frequently Asked Questions
Will converting to a higher bitrate improve quality?
No. Converting a 128 kbps MP3 to 320 kbps MP3 won't recover lost audio data — it just makes the file larger. To get higher quality, you need to convert from a lossless source (WAV or FLAC). Converting from lossy to lossy is fine for format compatibility, but each lossy re-encode loses a small amount of quality.
Should I use FLAC or WAV for archiving?
FLAC is generally the better choice. It's lossless (identical quality to WAV) but compressed to about 50-60% of the size. WAV is uncompressed and universally supported, so use it when you need maximum compatibility with audio editing software.
What's the best format for sharing music?
MP3 at 192-320 kbps is still the most universally compatible format. M4A (AAC) provides slightly better quality at the same bitrate and is the default on Apple devices. OGG is great for open-source platforms and gaming.