MP3MPEG-1 Audio Layer III
The most universal audio format. Its compression shrinks files a lot while keeping good listening quality, and it plays on every device.
- Compression
- Lossy
Convert MP3 to WAV
Turn your MP3 files into WAV files in seconds. Conversion happens in your browser, so your files are never uploaded to a server.
- Files never uploaded
- Free, no sign-up
- No queue
MP34944330400000000
WAV5249464624E20400
The first bytes of a file often reveal its real format.
or drop them here. You can also paste an image (Ctrl+V).
Free · No sign-up · No upload
Files
These sample files are generated on the page. Convert them to try it out, or add your own.
How to convert MP3 to WAV
- 01
Add your MP3 files
Click “Choose MP3 files” or drop them on the page. You can add several at once.
- 02
Check the WAV format
WAV is already selected. The sound is saved uncompressed, at full quality.
- 03
Convert and download
Click “Convert”, then download your WAV file. With several files, grab everything at once as a ZIP.
MP3 to WAV: what to know
People turn an MP3 into a WAV for editing software, a sampler or radio playout software that insists on uncompressed audio. The file produced is a 16-bit PCM WAV that keeps the MP3’s sample rate (usually 44.1 kHz, sometimes 48 or 22.05 kHz), with no resampling, and its number of channels. Expect about 42 MB for a four-minute stereo song at 44.1 kHz, against close to 4 MB as a 128 kbps MP3.
The WAV produced keeps the MP3’s title, artist, album, track number, year, genre and comment (the WAV’s LIST/INFO block), but not its artwork, which WAV has no place for: a message on the row says so. The sound itself is exactly what decoding the MP3 produces: it is not compressed a second time, so nothing degrades further while you edit it.
MP3 vs WAV: what’s the difference?
WAVWaveform Audio File Format
Uncompressed audio at full quality, used for recording and editing. One minute at CD quality weighs about 10 MB.
- Compression
- Uncompressed
MP3 to WAV: frequently asked questions
Is the resulting WAV suitable for burning an audio CD?
Yes for a 44.1 kHz stereo MP3, the most common kind: the WAV, 16-bit at 44.1 kHz, is then exactly in the audio CD format, so your burning software has nothing to convert. A 48 kHz MP3 gives a 48 kHz WAV, which the burning software will have to convert, and a mono source gives a mono WAV. The sound will still be that of the MP3, with no gain in quality. A 74-minute CD works out at roughly 780 MB of WAV.
Can I use this WAV as hold music on a business phone system?
Often not directly. Many phone systems and voice servers expect an 8 kHz mono WAV, sometimes encoded as µ-law or A-law. The WAV created here keeps the MP3’s sample rate, usually 44.1 kHz, at 16 bits, so you will need to adapt it with your provider’s tool or an audio editor. Check the required format in your phone system’s documentation.
Are my MP3 files uploaded to the internet?
No. The file is read and converted by your browser, on your device. Nothing is sent to a server, and nothing is kept after you close the page.
Does converting MP3 to WAV reduce quality?
No. WAV is uncompressed: the decoded sound of the MP3 is saved as is. The file will be much larger, though.
How many MP3 files can I convert?
As many as you like, for free and without signing up. Add them all, then download the results one by one or in a single ZIP. The maximum size depends on your device and browser, with a few caps that protect its memory (for example 20,000 files per archive or 5 million filled cells per workbook: see the home page FAQ); a file over one of them is not converted, and a message says so.
Does it work on iPhone and Android?
Formatomat is designed for recent browsers on computers, iPhone and Android, with no app to install. A conversion the browser cannot do (a format it cannot read or write) is refused with a message that says so.