Will I lose any audio quality converting WAV to FLAC?

No — none at all. FLAC is a lossless codec, meaning the audio it stores can be decoded back to a bit-for-bit identical copy of the original WAV. You get smaller files with exactly the same fidelity. This is the key difference from MP3, which permanently discards data.

How much smaller will the FLAC be?

Typically 40–55% smaller than the WAV, depending on the music. Quiet or simple recordings compress more; dense, loud, full-spectrum tracks compress less. A 40MB WAV usually becomes a 20–25MB FLAC.

Why convert WAV to FLAC instead of MP3 for archiving?

Because FLAC keeps every bit of the original while MP3 throws data away. For a master archive you want lossless, so you can always re-derive an MP3 later without ever degrading your source. FLAC is the standard archival format for exactly this reason.

Are my audio files uploaded to a server?

No. FFmpeg.wasm runs entirely in your browser. Your WAV files are compressed on your own device and never leave it. You can confirm this in your browser's Network tab — no upload occurs during conversion.

Can I get the original WAV back from the FLAC?

Yes. Because FLAC is lossless, decoding it back to WAV produces audio that is bit-for-bit identical to the original. Nothing is lost in the round trip.

Does FLAC preserve metadata like artist and album?

FLAC supports rich metadata tags. Any tags present in the source may carry over, but WAV itself stores metadata inconsistently, so you may need to add tags after conversion in a tag editor or media player.

Will FLAC play on my devices?

FLAC is supported by most modern players, Android, VLC, foobar2000, Plex, and many newer car stereos and DACs. Some older devices and car stereos don't support it — if you hit one, convert the FLAC to MP3 for that device while keeping the FLAC as your archive.

Can I batch convert multiple WAV files?

Yes — up to 20 WAV files at once. They compress in parallel and you can download them all as a ZIP, which is ideal for archiving a whole recording session or album.

What is the maximum file size?

100MB per WAV file. For very long uncompressed recordings that exceed this, a desktop FFmpeg install handles large batches more comfortably.

WAV to FLAC Converter

Convert WAV to FLAC free online — no upload, no signup. Shrink WAV by ~50% with zero quality loss for archiving. Lossless, browser-based, 100% private.

FileConvertir — Free Online File Converter