Will converting MP3 to WAV improve the sound quality?

No. MP3 compression discards detail permanently, and the WAV simply stores the decoded result without any further loss. It sounds identical to the MP3, just in a format editors and CD burners accept.

Why is the WAV so much bigger?

WAV is uncompressed: 16-bit stereo at 44.1 kHz takes about 10 MB per minute whatever the source bitrate was. A 5 MB MP3 of a four-minute song becomes a 42 MB WAV.

Can I burn the WAV to an audio CD?

Yes. Audio CDs use 16-bit stereo PCM at 44.1 kHz, which is what most MP3s decode to and exactly what Tinyvert writes. Burning software accepts the files directly.

Are the title, artist and album tags kept?

WAV has no standard tag field, so ID3 tags are not carried over. Keep the original MP3 for the metadata, or use the Audio Converter to produce FLAC, which does keep tags.

What bit depth and sample rate does the WAV have?

16-bit PCM at the same sample rate and channel count as the MP3, typically 44.1 kHz stereo. There are no options to set.

Can I convert several MP3s at once?

Up to five per batch, each with its own progress bar, with a ZIP download for the lot. Tinyvert Pro removes the limit.

MP3 to WAV Converter — Uncompressed PCM, Free

Convert MP3 to WAV

Decode MP3 files into uncompressed 16-bit PCM WAV that any editor, sampler or CD-burning program accepts. Converted on your device, nothing uploaded.

No upload — runs in your browser

Batch convert & ZIP download

Free, no sign-up

Drop MP3 files here

Choose files

Free: up to 5 files per batch · Files never leave your device · Paste from the clipboard works too

Private by design

Your files are processed by your own device using WebAssembly and your browser's built-in codecs. Nothing is uploaded, logged or stored.

Fast & offline-ready

No queue, no waiting for a server. Once the page has loaded it even works without a connection.

Works everywhere

Chrome, Edge, Firefox and Safari on Windows, macOS, Linux, Android and iOS. No app to install.

Why turn a small MP3 into a big WAV?

MP3 is the format for carrying music around, not for working on it. Plenty of software still wants uncompressed PCM, and the quickest route is to decode the MP3 once and hand over a WAV:

Audio editors and DAWs. Pro Tools, older video editors and most hardware samplers load WAV instantly, while their MP3 support is patchy or missing.
Burning an audio CD. Disc authoring tools expect PCM tracks; a Red Book CD is 16-bit 44.1 kHz stereo, exactly what you get here.
Telephone systems and voice prompts. PBX and IVR platforms are picky about containers and often accept WAV only.
Game engines and soundboards. Unity, Unreal and most soundboard apps play WAV with no decoding delay at all.
Avoiding generation loss. Each time an MP3 is edited and saved as MP3 again, quality drops. Edit in WAV and encode once at the end.

What the converter writes

Your browser's own MP3 decoder turns each frame back into samples, and Tinyvert writes them directly as a standard RIFF WAV file containing 16-bit PCM. No encoder is involved and there is no quality setting, because nothing is compressed. The sample rate and channel layout are preserved: a 44.1 kHz stereo MP3 becomes a 44.1 kHz stereo WAV, and a 22 kHz mono voice file stays mono. Tags are the one thing lost, since WAV has no proper place for title, artist or cover art.

Size before and after

Source MP3	Four-minute track	WAV output
128 kbps	3.8 MB	42 MB
192 kbps	5.8 MB	42 MB
320 kbps	9.6 MB	42 MB

The WAV is the same size whichever bitrate it came from, because the number of samples is identical. Do not be surprised by the figure shown in the row once it finishes: this is the one conversion on Tinyvert that is supposed to make files bigger.

No upload, no queue

Decoding happens on your device, so a folder of unreleased demos or a client's voice-over never touches a server. Both the MP3 and the finished WAV are held in memory until you download, and the output is large, so large files are limited by your device's memory: a two-hour DJ set is better converted on a laptop than on a phone. A typical song takes a few seconds, and the page keeps working offline once it has loaded.

Related conversions

Finished editing? Encode the result back with WAV to MP3. If your source is already lossless, FLAC to WAV gives you a full-quality WAV rather than a decoded MP3. For an explanation of when each format makes sense, read MP3 vs WAV vs FLAC.

How to convert mp3 to wav — step by step

Drop your MP3 files into the drop zone or click "Choose files".
There is nothing to configure: WAV is uncompressed, so each file starts decoding straight away.
A progress bar runs per file while the MP3 is decoded and written as 16-bit PCM on your device.
Download each WAV individually or all of them together as a ZIP.

Frequently asked questions

Will converting MP3 to WAV improve the sound quality?: No. MP3 compression discards detail permanently, and the WAV simply stores the decoded result without any further loss. It sounds identical to the MP3, just in a format editors and CD burners accept.
Why is the WAV so much bigger?: WAV is uncompressed: 16-bit stereo at 44.1 kHz takes about 10 MB per minute whatever the source bitrate was. A 5 MB MP3 of a four-minute song becomes a 42 MB WAV.
Can I burn the WAV to an audio CD?: Yes. Audio CDs use 16-bit stereo PCM at 44.1 kHz, which is what most MP3s decode to and exactly what Tinyvert writes. Burning software accepts the files directly.
Are the title, artist and album tags kept?: WAV has no standard tag field, so ID3 tags are not carried over. Keep the original MP3 for the metadata, or use the Audio Converter to produce FLAC, which does keep tags.
What bit depth and sample rate does the WAV have?: 16-bit PCM at the same sample rate and channel count as the MP3, typically 44.1 kHz stereo. There are no options to set.
Can I convert several MP3s at once?: Up to five per batch, each with its own progress bar, with a ZIP download for the lot. Tinyvert Pro removes the limit.