Convert Audio Between MP3, WAV, M4A, OGG & FLAC
Convert audio files between MP3, WAV, M4A, OGG, and FLAC entirely in your browser. Batch up to 10 files at once — nothing is ever uploaded.
Drag and drop audio files here, or click to browse
MP3, WAV, M4A, OGG, FLAC, AAC, Opus, or WebM — up to 10 files, 100MB each
About the Audio Converter
This free tool converts audio files between MP3, WAV, M4A, OGG, and FLAC — perfect for making a podcast episode compatible with an old player, shrinking a FLAC album for your phone, or turning a WhatsApp voice note into an MP3. Everything runs locally in your browser using FFmpeg compiled to WebAssembly, so your files are never uploaded to a server. Convert up to 10 files at once.
Features:
- Convert between MP3, WAV, M4A, OGG, and FLAC
- Choose bitrate (128-320 kbps), sample rate, and mono/stereo channels
- Batch-convert up to 10 files at once with per-file progress
- Privacy-first — conversion happens entirely on your device
How to Convert Audio Files
- Upload up to 10 audio files by dragging them in or browsing
- Choose your output format, bitrate, sample rate, and channels
- Click Convert All and watch each file's progress
- Preview, download individually, or download everything as a ZIP
Frequently Asked Questions
Is this audio converter really free?
Yes. There's no signup, no watermark, and no limit on how many times you convert — everything runs in your browser.
Does my audio get uploaded to a server?
No. The entire conversion happens locally using FFmpeg compiled to WebAssembly. Your files never leave your device.
What audio formats can I upload?
MP3, WAV, M4A, OGG, FLAC, AAC, Opus, and WebM are all supported as input, up to 100MB per file.
Will converting MP3 to FLAC improve the quality?
No. Once audio is compressed into a lossy format like MP3, the detail that gets discarded is gone for good — converting it to FLAC afterward just wraps the same reduced-quality audio in a lossless container. It won't sound any better, and the file will be larger. To get a real FLAC-quality result, you need to start from an uncompressed or lossless source.
Which format should I choose?
MP3 is the most universally compatible and a good default. Choose WAV or FLAC when you need lossless quality for editing or archiving. Choose M4A/AAC for Apple devices, and OGG Vorbis for open-source or Linux-friendly software. If in doubt, MP3 at 192-256 kbps works almost everywhere.
Can I convert multiple files at once?
Yes. Upload up to 10 files, and they'll be converted one after another with the same settings, then you can download them individually or all together as a ZIP.
Privacy
Your audio files are processed entirely in your browser using WebAssembly — they are never uploaded to any server, so your files stay completely private.