Convert MP3 to WAV online
Convert an MP3 into uncompressed WAV (16-bit PCM), ready for a DAW or for burning an audio CD, without uploading the file to any server.
Convert MP3 to WAV
Your file is processed right in this browser: it never gets uploaded to any server.
Why use PullVid for MP3 → WAV?
Conversion details
How do you convert an MP3 to WAV?
Choose the MP3 file you want to convert to WAV.
Hit 'Convert' and wait for the browser to process the audio (nothing to upload).
Download the resulting WAV; it saves straight to your device.
If you have an MP3 and need the audio in uncompressed WAV — because your editing program asks for it, you're burning an audio CD, or an older device doesn't handle MP3 — this converter turns it into WAV right in your browser, without uploading the file to any server.
What's converting an MP3 to WAV good for?
Plenty of audio editing programs (DAWs), professional PA systems and CD burners work best — or exclusively — with WAV, the uncompressed PCM format. If the only file you have is an MP3, converting it to WAV gets you into the format those tools expect, without having to re-record anything.
The honest part: you don't get back what the MP3 already lost
This is worth being clear about: MP3 is a lossy format, and that loss happened the moment the file was created, irreversibly. Converting it to WAV doesn't 'restore' or improve the audio — you get exactly the same sound the MP3 had, just uncompressed, in a much bigger file. If you need maximum fidelity, the only real fix is starting from an uncompressed source in the first place (a FLAC, for instance, if you have one), not converting an existing MP3.
How it works: converted in your browser, not on a server
We use ffmpeg compiled to WebAssembly, running inside your browser tab. When you hit 'Convert', the MP3 gets decoded and the resulting audio is saved as uncompressed 16-bit PCM, without the file ever leaving your machine. The result downloads directly, just like any other file.
Steps to convert your MP3 to WAV
- Choose the MP3 file from your device ('Choose file' button).
- Hit 'Convert'. The first time, your browser downloads the conversion engine (a few MB); after that, it's faster.
- Wait for the progress bar to reach 100%.
- Download the resulting WAV with the 'Download result' button.
Honest limits worth knowing
Since the conversion happens in your browser, the real limit is your device's memory and processing power, not an artificial cap of ours. The resulting WAV weighs several times more than the source MP3, so very long audio files can produce a large output that takes a while to generate or download, especially on phones with limited RAM.
Other related conversions
If you need the opposite — shrinking a heavy WAV down to a portable MP3 — use WAV to MP3. And if your original source is a lossless FLAC library, check out FLAC to MP3 for the compressed version. If you don't have the audio file yet, use our YouTube video downloader.
Related articles
MP3 vs M4A: Which Audio Format Should You Choose?
The practical differences between MP3 and M4A: compatibility, quality, file size, and when to use each when downloading audio.
How to Download High-Quality Audio (320 kbps)
A complete guide to getting the best audio quality when downloading: what 320 kbps means, when it matters, and how to get it.
Convert video to MP3 (any platform)
How to convert any video to MP3 for free: from YouTube, TikTok and more. High-quality audio up to 320 kbps, no software, straight from your browser.
Frequently asked questions about MP3 → WAV
Does converting an MP3 to WAV bring back the quality the MP3 lost?
No, and it's worth knowing that before you convert: the MP3 already discarded some audio information the moment it was created, and that data can't be recovered. Converting to WAV gets you the same audio, uncompressed, but not a 'better' version than the original MP3.
So what's the point of converting MP3 to WAV, then?
It gets your audio into an uncompressed format that many editing programs (DAWs), professional PA systems or audio CD burners specifically ask for, even though you don't gain any fidelity over the MP3. It's also handy when older software doesn't handle MP3 directly.
Why does the resulting WAV weigh so much more than the original MP3?
Because WAV stores every audio sample uncompressed (PCM), while MP3 compresses that same data. During conversion, a file can grow from a few MB to several times that size, even though the actual sound content is the same as the source MP3.
Can I use the resulting WAV to burn an audio CD?
Yes, that's one of the most common uses: most audio CD burning software requires WAV (typically 16-bit/44.1 kHz, which is exactly what we generate) instead of MP3.
Is there a limit on the MP3 file's length or size?
We don't set an artificial limit, but the process runs in your browser: very long MP3 files can produce a fairly large WAV and take a bit longer on phones with limited memory.