Why WAV files are so large
WAV is the Waveform Audio File Format, created by Microsoft and IBM in 1991. It normally stores raw PCM samples with no compression at all. CD-quality stereo (16-bit, 44.1 kHz) runs at 1,411 kbps, which is about 10.1 MB for every minute. A 24-bit, 48 kHz recording is about 16.5 MB per minute.
That simplicity makes WAV the standard for recording and editing, but it wastes space when you are storing or sharing finished audio.
What FLAC does differently
FLAC, the Free Lossless Audio Codec, was released in 2001 and is maintained by the Xiph.Org Foundation. It predicts each sample from the ones before it and stores only the small difference. When you play the file back, the decoder rebuilds the exact original samples.
Music typically compresses to 50 to 70% of the WAV size. Quiet recordings, speech and tracks with silence often compress further; loud, dense masters compress less. FLAC also has proper tagging for artist, album and artwork, which WAV handles poorly.
WAV vs FLAC comparison
| WAV | FLAC | |
|---|---|---|
| Compression | None (PCM) | Lossless |
| Quality | Lossless | Lossless, identical on playback |
| Typical size per minute (CD quality) | About 10.1 MB | About 5 to 7 MB |
| Metadata | Basic and inconsistent | Full tags and cover art |
| Compatibility | Universal | Most players and Android; not Apple Music on Mac |
| Best for | Recording, editing, DAWs | Archiving, music libraries, sharing lossless |
Reasons to change WAV to FLAC
- Archive CD rips, field recordings or finished mixes in less space.
- Send lossless audio to a collaborator without a huge transfer.
- Build a lossless library for a streaming server or an Android player.
- Keep a master copy you can convert to MP3 or other formats later without any generational loss.
Lossless, with one caveat
A 16-bit WAV converted to FLAC is perfectly lossless. Convert it back to WAV and you get the same audio you started with.
AudioDrop's FLAC encoder writes 16-bit files and keeps the source sample rate. That means a 24-bit or 32-bit float WAV will be reduced to 16-bit on the way in. For listening copies that is fine, and 16-bit covers roughly 96 dB of dynamic range. For a studio master where you want every bit preserved, keep the original high-resolution WAV as well.
Because FLAC is lossless, there is no bitrate to choose. File size depends on the audio itself, not on a setting.
How to convert WAV to FLAC on any device
You can convert WAV to FLAC on Mac, Windows, iPhone or Android without installing anything. Open the page, drop the files and download the results.
On Mac and Windows, drag WAVs from Finder or File Explorer into Chrome, Edge, Firefox or Safari. On iPhone and iPad, use Safari and pick files from the Files app; the FLACs save back to Files. On Android, Chrome lets you pick from Downloads or any folder your file manager exposes.
Before you delete any WAV originals, do a quick check:
- Play a couple of the FLACs from start to finish in your usual player.
- Compare durations with the WAVs; they should match.
- Retag the files if you rely on artist and album information, since WAV tags are not guaranteed to be copied.
- Keep any 24-bit or 32-bit float originals if you may need them for mixing or mastering.
Private WAV to FLAC conversion in your browser
WAV files are big, and uploading gigabytes to an online converter takes a long time. AudioDrop avoids that entirely. It reads your WAVs in the browser and runs its own FLAC encoder in WebAssembly, so the audio never leaves your computer or phone.
Drop dozens of files and they encode in parallel, each with its own download. The tool keeps working offline once loaded. There is no fixed file size cap; very long recordings are limited only by device memory.