Convert WAV to FLAC Online Free
Convert your .wav files to .flac format. Free, fast, and processed entirely in your browser — your files never leave your device.
Convert WAV to FLAC — half the size, identical audio, full metadata
WAV to FLAC is the smartest archival conversion you can do for an uncompressed audio library. FLAC compresses WAV losslessly — the audio data is bit-perfect, but the file is roughly 50-60% smaller, and unlike WAV, FLAC carries proper metadata (artist, album, embedded album art). The trade-off is a slight loss of compatibility with some pro audio tools. Here's when this conversion is the right call, when WAV is still the right format, and how to do it cleanly.
When WAV to FLAC is worth doing
- You're archiving a finished mix, master, or CD rip and want to save 40-60% of the disk space without losing a bit of audio data. FLAC's compression is mathematically lossless — decompressed, it's identical to the source WAV.
- You want metadata in your library: artist, album, year, track number, embedded album art. WAV has limited metadata support; FLAC has Vorbis comments which are rich and well-supported.
- You're moving a library to a HiFi DAP, audiophile streamer (Roon, BluOS, Plex with high-res), or NAS where space matters and FLAC is well-supported.
- You're backing up to cloud storage. FLAC's smaller size means faster uploads and cheaper storage, with zero quality loss.
- You're sharing audio with audiophile friends or releasing tracks on Bandcamp or similar platforms that prefer FLAC for downloads.
When you should keep the WAV
- You're handing the file to a mastering engineer or post-production team. Pro audio workflows expect WAV. Always send WAV unless they explicitly ask for FLAC.
- You're working in a DAW that doesn't decode FLAC efficiently or at all. Pro Tools added FLAC import in 2022; older versions don't have it. Logic, Reaper, and Ableton all support FLAC, but performance under heavy track counts may suffer with FLAC vs WAV.
- You need sample-accurate timing for editing. FLAC and WAV are equivalent at sample level once decoded, but some editors snap to FLAC frame boundaries on edits — keep WAV for sample-precision work.
- Your storage isn't constrained. If your drive isn't filling up, the FLAC compression buys you nothing meaningful and adds a tiny CPU cost on every playback.
How small the FLAC will be
FLAC compression is data-dependent — quiet music compresses better than dense, loud music. Typical results: pop and rock at ~55% of source WAV, classical at ~50%, electronic and synth-heavy material at ~60-65%. The audio inside is bit-identical to the WAV.
| Duration | WAV | FLAC | Note |
|---|---|---|---|
| 1 minute | ~10.1 MB (WAV) | ~5-6 MB | 50-60% — typical pop/rock |
| 10 minutes | ~101 MB (WAV) | ~50-60 MB | ~10× smaller than uncompressed PCM |
| 1 hour | ~605 MB (WAV) | ~300-360 MB | Comparable to a high-bitrate MP3 in size |
| CD-length album (74 min) | ~745 MB (WAV) | ~370-440 MB | Two CDs fit where one WAV used to live |
Source: 16-bit / 44.1 kHz stereo WAV (~10 MB/min). Target: FLAC at default compression (-5). Higher compression levels (-8) save another 1-2% at significant CPU cost.
Where FLAC plays well
Works with
- VLC, foobar2000, MusicBee, Clementine — every audiophile-leaning music player
- Roon, BluOS, Plex, Jellyfin, Emby — home media and high-res streaming
- HiFi DAPs: Astell&Kern, FiiO, HiBy, Sony NW-WM1A, etc.
- Most modern Android phones and home AV receivers
- Browser <audio> on Chrome, Firefox, Edge, recent Safari
- Reaper, Ableton, Logic, Audacity (DAW playback and editing)
Does not work with
- iTunes / Apple Music — Apple uses ALAC, not FLAC
- Older Pro Tools versions (pre-2022 builds may need WAV)
- Most car head units (a few high-end ones support FLAC; most do not)
- Some Bluetooth devices that hardware-decode AAC/MP3 but not FLAC
- Email and chat platforms (no benefit over MP3 for sharing)
How to convert WAV to FLAC
Convert with WaveSieve (browser, free, no upload)
Quickest path. Conversion runs in your browser via FFmpeg.wasm — your file never leaves your device, no account needed.
- Drop your WAV file onto the upload area at the top of this page. Up to 100 MB per file.
- In the converter, change the output format to FLAC.
- Click "Convert to FLAC". Encoding takes 10-60 seconds depending on file length and compression level.
- Click "Download" to save the FLAC.
Convert with foobar2000 (Windows, free, batch with metadata)
foobar2000 handles WAV → FLAC batches with full metadata control, embedded album art, and audiophile-grade encoder settings.
- Install foobar2000 (free at foobar2000.org).
- Add your WAV files: File → Open or drag them into the playlist.
- Right-click → Convert → ... → New Profile: 'FLAC'.
- Set compression level (5 default, 8 maximum but slower). All levels are lossless and audibly identical.
- Pick a destination folder, fill in any metadata you want to add, click Convert.
Convert with FFmpeg (command line, batch, cross-platform)
For batch jobs and pipelines. Uses the official libFLAC encoder.
- Install FFmpeg: brew install ffmpeg (macOS), winget install ffmpeg (Windows), or sudo apt install ffmpeg (Linux).
- Open a terminal in the folder with your WAVs.
- Single file: ffmpeg -i input.wav -c:a flac output.flac
- Specify compression level (0-12, default 5): ffmpeg -i input.wav -c:a flac -compression_level 8 output.flac
- Whole folder: for f in *.wav; do ffmpeg -i "$f" -c:a flac "${f%.wav}.flac"; done
Things that surprise people
FLAC is lossless — but not all "lossless" claims are real
FLAC's encoding is mathematically lossless — decompress a FLAC and you get the exact bytes from the source WAV. There is no quality loss, period. If anyone tells you they 'hear FLAC vs WAV' on the same source, what they're hearing is probably playback chain differences (different DACs, different software paths) — not the codec itself. Bit-comparison tools like dBpoweramp's bit-checker confirm FLAC ↔ WAV round-trips are identical.
Some DAWs are slower with FLAC than WAV during playback
When a DAW plays back FLAC, it has to decode each frame in real time. With one or two tracks this is invisible, but with 30+ tracks of FLAC running simultaneously (a busy mix), older or modest-CPU machines can hiccup. WAV needs no decoding, so playback is cheap. For active editing of busy sessions, WAV is the safer choice; archive to FLAC after the mix is done.
FLAC compression level only affects encode time, not quality
Newcomers sometimes assume 'higher compression = lower quality.' Wrong for FLAC. Levels 0-8 (or FFmpeg's extended 0-12) all produce bit-identical output. The level just controls how hard the encoder works to find a smaller file. Default 5 is the sweet spot. Levels 7-8 save 1-3% at 2-3× encode time. Levels 9-12 are FFmpeg-only and rarely worth the CPU.
Frequently Asked Questions
Is FLAC really lossless? Can I bit-compare to confirm?
Yes, and yes. Use a tool like dBpoweramp Bit-Comparator, or run shasum on both files after a round-trip (WAV → FLAC → WAV via FFmpeg with -c:a pcm_s16le). The decoded WAV will have identical samples to the original. The header may differ slightly (timestamps, encoder info), but the audio data is byte-perfect.
Should I use FLAC compression level 8 for archival?
Probably not. Level 5 is the default and produces files within 1-3% of level 8's size. Level 8 takes 2-3× longer to encode. If you're archiving thousands of files, that adds up. The space savings are tiny; most people stick with 5.
Can I add album art and detailed tags to FLAC?
Yes — FLAC supports embedded album art, ID3-like tags via the Vorbis comment standard, and even custom user-defined tags. Use foobar2000, Mp3tag, or Picard (MusicBrainz) to add metadata after conversion. Most music players read FLAC metadata cleanly.
Is FLAC better than ALAC (Apple Lossless)?
Both are lossless and audibly identical. FLAC is open-source and supported almost everywhere except Apple Music; ALAC is Apple's lossless format and works seamlessly in iTunes/Apple Music/iPhone. Pick based on your library context: FLAC for cross-platform, ALAC for Apple ecosystem.