Does converting MP3 to WAV improve the quality?

No, and nothing could. An MP3 has already discarded detail to compress, and that detail cannot come back. What a WAV gives you is an uncompressed copy that adds no further loss and that editing and CD software can read directly — not better sound, but a better working format.

Why is the WAV so much larger?

Because it is uncompressed. WAV stores every audio sample in full, so a file is typically around ten times the size of the MP3 it came from. That is the trade for a format editors and samplers can work with directly.

What kind of WAV do I get?

A standard 16-bit PCM WAV — the universal interchange depth that every editor, DAW and sampler reads. The channels and sample rate are kept exactly as the MP3 had them, so the WAV is in audio-CD format (44.1 kHz stereo) when the MP3 is, as most music MP3s are; a 48 kHz or mono MP3 gives a 48 kHz or mono WAV. Very loud masters can have peaks that clip slightly when written at 16 bits.

Is there a length limit?

Yes, because a WAV can be up to 400 MB. That is about 39 minutes of 44.1 kHz stereo, or 36 minutes at 48 kHz, and a longer recording is turned down before any work is done. Use the trim option to convert it a section at a time.

Can I convert only part of the track?

Yes. Open the advanced options and enter a range such as 00:15-00:45 to keep only that section. By default the whole track is converted.

Is this converter free?

Yes. Every conversion on ConvertNicely is free to use, with no account and no watermark on the result. Everyone can run 50 jobs and upload 2 GB a day, with or without an account.

What happens to my files?

Your uploaded file is deleted from our servers the moment the conversion finishes, whether it succeeded or failed. The converted result is deleted automatically one hour later, and you can delete it yourself at any time with the Delete button.

Is there a file size limit?

Files up to 95 MB are accepted for this conversion. Larger limits apply to paid plans in future, but the free limit is generous enough for the overwhelming majority of WAV conversions.

Do I need to install anything?

No. ConvertNicely runs entirely in your browser and on our servers, so there is nothing to download or install. It works the same on Windows, macOS, Linux, Android and iOS.

Does it work on a phone?

Yes. The whole site is built mobile-first, so you can upload from your camera roll or files app, convert, and download the result without leaving your browser.

Free

Convert MP3 to WAV

MP3 is compressed for small files; WAV is the raw, uncompressed audio that editors, samplers and CD software expect. This decodes your MP3 to a standard 16-bit PCM WAV — the universal interchange format — so it drops straight into a DAW, a sampler or a disc, keeping the original channels and sample rate exactly as they were.

Also known as: MP3 to WAV converter · MP3 to WAVE · MP3 to uncompressed audio

Files up to 95 MBTypically under a minuteNeed WAV to MP3 instead?

Drop your file hereor choose a file from your deviceMP3 · up to 95 MB

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How to convert MP3 to WAV

Step 1
1. Add your MP3 file
Drag your MP3 file into the box, or choose it from your device. It can be up to 95 MB.
Step 2
2. Choose your settings
Optional settings are under Advanced options; the starting values suit most files.
Step 3
3. Press Convert to WAV
The work happens on our servers, and you can follow its progress. Long recordings take longer.
Step 4
4. Download your WAV file
Your upload is already deleted, and the result is deleted after one hour.

Worth knowing

A WAV is bigger — often ten times the MP3 — because nothing is compressed, so the result can be up to 400 MB: about 39 minutes of 44.1 kHz stereo, or 36 minutes at 48 kHz. For a longer recording, use the trim option to convert it a section at a time. The WAV is 16-bit PCM at the MP3's own channels and sample rate; it cannot recover detail the MP3 already discarded, but it adds no further compression.

Why convert MP3 to WAV?

Importing a track into an audio editor or DAW that prefers WAV
Loading a sound into a hardware sampler or groovebox
Preparing audio to burn to an audio CD
Handing a studio or press a lossless-container master

MP3 vs WAV

Comparison of MP3 and WAV
Property	MP3	WAV
Format	MP3 (compressed)	WAV (uncompressed PCM)
File size	Small	Much larger
Best for	Listening and sharing	Editing, sampling and CD
Re-encoding	Lossy	No further loss on this step

Frequently asked questions

Page updated 21 October 2026

All Audio converters

Convert MP3 to WAV

How to convert MP3 to WAV

1. Add your MP3 file

2. Choose your settings

3. Press Convert to WAV

4. Download your WAV file

Why convert MP3 to WAV?

MP3 vs WAV

Frequently asked questions

WAV to MP3

M4A to MP3

FLAC to MP3

MP4 to MP3

Convert MP3 to WAV

How to convert MP3 to WAV

1. Add your MP3 file

2. Choose your settings

3. Press Convert to WAV

4. Download your WAV file

Why convert MP3 to WAV?

MP3 vs WAV

Frequently asked questions

Does converting MP3 to WAV improve the quality?

Why is the WAV so much larger?

What kind of WAV do I get?

Is there a length limit?

Can I convert only part of the track?

Is this converter free?

What happens to my files?

Is there a file size limit?

Do I need to install anything?

Does it work on a phone?

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WAV to MP3

M4A to MP3

FLAC to MP3

MP4 to MP3