MP3 to WAV Converter
Convert MP3 to WAV free — no upload, no signup
To convert MP3 to WAV, drop your MP3 audio files into the box below and click Convert. Fylo converts with ffmpeg running inside your browser, so nothing is uploaded and there's no signup or watermark. WAV files are uncompressed, so a 4 MB song becomes about 32 MB.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
WAV is lossless — no bitrate to choose. Sample rate and channels are under Advanced.
Advanced
How to convert MP3 to WAV
Add your MP3 files
Drag and drop MP3 files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Check the settings
WAV is lossless, so there's no bitrate to pick. Change sample rate or switch to mono under Advanced if a device needs it.
Convert and download
Click Convert, then download each WAV file or all of them as one ZIP.
Why convert MP3 to WAV?
Audio editors, DJ software, samplers, game engines and some phone systems (IVR/hold music) require uncompressed WAV. Converting avoids decoding delays and import errors.
What happens when you convert MP3 to WAV?
Fylo decodes the MP3 and writes 16-bit PCM WAV at the original sample rate. The file grows to roughly 10 MB per minute of stereo audio.
How does Fylo convert MP3 to WAV?
Fylo decodes the MP3 audio in the MP3 with ffmpeg compiled to WebAssembly and encodes it with 16-bit little-endian PCM with no compression. Nothing is added back: the WAV is an exact but larger copy of the decoded MP3 (≈ 32 MB for a 3-minute song versus ≈ 4.3 MB at 192 kbps). The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between MP3 and WAV?
MP3 (MPEG-1 Audio Layer III) was developed largely at Germany's Fraunhofer Institute and standardised in 1993. It removes sounds the ear is unlikely to notice — a technique called perceptual coding — so a 3-minute song takes about 4 MB at 192 kbps instead of about 32 MB as WAV. The last MP3 patents expired in 2017, so it's now free to use.
WAV was introduced by Microsoft and IBM in 1991 and, like AVI, uses the RIFF container. Most WAVs hold uncompressed PCM audio: CD quality (44.1 kHz, 16-bit, stereo) runs at 1,411 kbps, or about 10.6 MB per minute.
Learn more: MP3 format guide · WAV format guide
| Property | MP3 | WAV |
|---|---|---|
| Compression | Lossy | None (PCM) |
| Typical bitrate | 128–320 kbps | 1,411 kbps (CD quality) |
| 3-minute song | ≈ 4.3 MB at 192 kbps | ≈ 32 MB |
| Tags and cover art | Yes (ID3) | Limited |
| Compatibility | Universal | Universal on computers; editors and DAWs |
| Best for | Music and podcasts on any device | Recording, editing, mastering |
| Introduced | 1993 | 1991 |
Frequently asked questions
Does converting MP3 to WAV improve quality?
No. MP3 is lossy, so detail removed during its compression can't be restored. The WAV is a lossless copy of what the MP3 sounds like — bigger, but not better.
Which WAV settings does Fylo use?
16-bit PCM at the MP3's sample rate (usually 44.1 kHz). Change sample rate or switch to mono under Advanced.
Is my MP3 file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your MP3 file is read directly from your device and never sent anywhere.
Related tools
Updated