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.