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Audio Converter
Convert audio files between MP3, WAV, M4A and OGG using ffmpeg.wasm — entirely in your browser, no upload. First use downloads the ~30 MB engine.
⚡ Runs entirely in your browser via ffmpeg.wasm. The engine (~30 MB) downloads on first use; large files are slow and limited by your device's memory. Nothing is uploaded.
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Click or drop an audio file to convert
Processed locally in your browser — never uploaded.
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
Which formats can I convert between?＋
MP3, WAV, M4A and OGG, in your browser via ffmpeg.wasm.
Why is conversion slow?＋
Encoding runs locally through ffmpeg compiled to WebAssembly, which is slower than native software; larger files take longer.
Are my audio files uploaded?＋
No — conversion happens entirely on your device.