MP3 to WAV Converter

Turn an MP3 into an uncompressed WAV file for editing, mixing or burning to CD. The file is converted in your browser and never sent to a server.

Files Stay on Your Device

Drop your MP3 here, or choose a file

Converts MP3 to uncompressed 16-bit WAV. Trim it first if you only need one part. It stays on your device.

Choose a File

Your browser converts the file. Nothing is sent to a server.

  • No signup, no watermark
  • Converts on your device
  • About 2 sec for a 47 sec clip
  • Works offline once loaded

How to Convert MP3 to WAV

  1. 1

    Choose Your Audio File

    Choose the MP3 file. Drop it on the page, tap Choose a File, or paste a direct link to the file.

  2. 2

    Check WAV and Trim

    WAV is already selected. Turn on Trim and set a start and end time if you only need part of the track.

  3. 3

    Convert and Download

    Press Convert to WAV. Play it in the preview player and download the WAV.

What Changes When MP3 Becomes WAV

MP3 is compressed: it throws away sound most people cannot hear to keep the file small. WAV stores every sample as it is, with no compression at all.

Converting MP3 to WAV unpacks the MP3 into plain samples. The detail MP3 removed does not come back, but nothing more is lost, and every editor, DAW and CD burner can open the result without decoding it first.

WAV, short for Waveform Audio File Format, was developed by Microsoft and IBM in 1991. It is a Resource Interchange File Format (RIFF) file that usually holds PCM samples, which is why it is the common format for audio editors on Windows, Mac and Linux. MP3, short for MPEG-1 Audio Layer III, does the opposite: it compresses audio to about a tenth of the WAV size.

What an MP3 to WAV conversion doesAn MP3 file on the left holds compressed audio at about 1.4 megabytes a minute at 192 kbps. An arrow labelled decode audio, write WAV points to a WAV file on the right that stores every sample as 16-bit PCM, about seven times bigger at 44.1 kHz.MP3 file (compressed)MP3 audio, about 1.4 MB a minute · decodeddecode audiowrite WAVWAV file16-bit PCM, every sample storedAbout 7 times bigger at 44.1 kHzWhat an MP3 to WAV conversion doesMP3 file (compressed)MP3 audio, about 1.4 MB a minute · decodeddecode audiowrite WAVWAV file16-bit PCM, every sample storedAbout 7 times bigger at 44.1 kHz
The MP3 is unpacked into plain samples. Nothing is added back, and nothing more is lost.
MP3 and WAV compared
MP3WAV
CompressionLossy, removes detailNone, stores every sample
Size per minute (stereo)About 1.4 MB at 192 kbpsAbout 10 MB at 16-bit, 44.1 kHz
Best forListening, sharing, phonesEditing, mixing, CD burning, apps that only take WAV
Editing again and againEach new save loses a little moreNo loss on each save
Full nameMPEG-1 Audio Layer IIIWaveform Audio File Format (RIFF)
Largest fileNo practical limit4 GB, about 6 hours of 16-bit stereo

Why Convert MP3 to WAV

  • Edit Without Extra Loss

    Audio editors save MP3 by encoding again, which loses a little each time. Edit a WAV and the sound stays the same through every save.

  • Burn an Audio CD

    CD burning tools work from uncompressed audio. Give them a WAV and they do not need to decode anything.

  • Apps That Only Take WAV

    Some samplers, DJ software, game engines, phone systems and upload forms accept WAV only.

Will the WAV Sound Better Than the MP3?

No. A WAV made from an MP3 sounds the same as that MP3, because the detail MP3 removed is gone for good. What you gain is a file that loses nothing more when you edit it.

The WAV is written as 16-bit PCM at the sample rate your browser decodes to, usually 44.1 or 48 kHz. That is CD quality or better, and every editor reads it.

MB per minute of stereo audio

  • MP3 128 kbpsAbout 0.96 MB
  • MP3 192 kbpsAbout 1.44 MB
  • MP3 320 kbpsAbout 2.4 MB
  • WAV 44.1 kHzAbout 10.6 MB
  • WAV 48 kHzAbout 11.5 MB
The WAV is far larger but sounds the same as the MP3 it was made from. Its size is set by the sample rate, not by the MP3 bitrate.

MP3 to WAV: Frequently Asked Questions

Does converting MP3 to WAV improve the quality?
No. The WAV sounds the same as the MP3. It stops further loss when you edit, but it cannot bring back detail the MP3 removed.
Why is the WAV so much bigger than the MP3?
WAV is not compressed. One minute of 16-bit stereo audio is about 10 MB as WAV, against about 1.4 MB as a 192 kbps MP3.
Is my MP3 file sent to a server?
No. Your browser reads the MP3 file and writes the WAV on your own device. Nothing is sent to MP4toMP3.io or anyone else, and the page keeps working with Wi-Fi off once it has loaded.
What kind of WAV do I get?
16-bit PCM WAV, stereo or mono like the MP3, at 44.1 or 48 kHz depending on your device. It opens in Audacity, GarageBand, Premiere, FL Studio, Windows Media Player and on phones.
Can I convert only part of the MP3?
Yes. Turn on Trim, set the start and end time, and only that part is saved as WAV.
Can I convert WAV back to MP3?
Yes, on the WAV to MP3 page. That makes the file about seven times smaller at 192 kbps.
Can I convert MP3 to WAV on my phone?
Yes. Open this page in Chrome on Android or Safari on iPhone, choose the MP3 and press Convert to WAV. The WAV saves to Downloads.
Can I choose the sample rate or bit depth?
Not yet. The WAV is always 16-bit, the CD standard, at 44.1 or 48 kHz depending on your device. Every editor and DAW reads both.
Is there a file size limit?
No upload limit, because the MP3 file is never uploaded. Up to about 45 minutes converts in one quick pass on a computer, 15 minutes on a phone; longer files use a slower mode that plays the sound through once.
Can I batch convert MP3 files to WAV?
Not yet. Convert one file at a time; each one takes a few seconds. Batch conversion is planned.

Ready to Convert MP3 to WAV?

Choose a file at the top. It is free, private and done in your browser in a few seconds.

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