Need uncompressed audio for your DAW or editor? Drop an MP3 below — it’s converted to WAV right in your browser, never uploaded anywhere.

MP3 to WAV Converter — Free, Private, In Your Browser

Convert MP3 to WAV right in your browser. Your file is decoded with the Web Audio API and exported as 16-bit PCM WAV at 44.1 kHz with stereo preserved — nothing is ever uploaded, and it keeps working offline.

🎵 Drop your MP3 here, or click to browse

Your file never leaves this device — conversion happens 100% locally.

Reading file…
✅ Conversion complete — your WAV is ready
⬇ Download WAV
100% private

Files are decoded and encoded on your device with the Web Audio API. Nothing is uploaded to any server — ever.

No signup

No account, no email, no watermarks. Convert as many MP3s as you like, as often as you like.

Free forever

Full 16-bit PCM WAV export at 44.1 kHz with stereo preserved, at zero cost.

How to convert MP3 to WAV

  1. 1
    Choose your MP3

    Drag and drop the MP3 onto the box above, or click it to browse your files. You’ll see the file name and size right away.

  2. 2
    Wait a few seconds

    The browser decodes the MP3, renders it to 44.1 kHz (in memory-friendly chunks for long files), and encodes uncompressed 16-bit PCM — all on your device.

  3. 3
    Download the WAV

    Check the duration, sample rate, and file size, then hit the download button. The file saves as yourname.wav to your usual downloads folder.

  4. 4
    Use it anywhere

    WAV is the universal uncompressed format — import it into Audacity, Premiere, FL Studio, or any DAW or video editor with zero compatibility issues.

Why convert with this tool

🔒 Private by design

Most online converters upload your audio to a server. This one never makes a network request — the Web Audio API decodes the MP3 and the WAV encoder runs in plain JavaScript on your machine.

🎧 True 16-bit PCM WAV

Output is a standards-compliant WAV: RIFF header, 16-bit PCM samples, 44.1 kHz sample rate, with your original mono or stereo channels preserved exactly.

🔌 Handles long files

Long recordings are rendered in 60-second chunks and stitched together, so even hour-long MP3s convert without running out of memory.

📱 Works on any device

Phone, tablet, Chromebook, or desktop — anything with a modern browser (Chrome, Edge, Firefox, Safari) can run it. It even works offline once the page has loaded.

⚡ Fast and free

No queues, no accounts, no “premium” tier. A 3-minute song typically converts in a few seconds on a modern laptop.

🌐 Universal output

WAV plays everywhere: Windows Media Player, QuickTime, VLC, DJ software, video editors, and game engines. If a tool accepts audio, it accepts this file.

MP3 to WAV FAQs

Is my audio really kept private?
Yes. The entire conversion runs inside your browser tab using the Web Audio API’s decodeAudioData and a JavaScript WAV encoder. No file data is uploaded, no analytics track your files, and the tool keeps working if you disconnect from the internet after the page loads.
What quality is the output WAV?
The output is 16-bit PCM WAV at 44.1 kHz — CD quality and the most widely compatible uncompressed format. One honest note: converting can’t restore quality lost when the MP3 was compressed. An MP3 becomes a perfect WAV copy of the MP3’s sound, not better than it.
Why is the WAV file so much bigger than the MP3?
That’s normal. A 128 kbps MP3 stores about 1 MB per minute using lossy compression, while 16-bit stereo WAV at 44.1 kHz stores every sample uncompressed — about 10.6 MB per minute. Editing software prefers WAV precisely because nothing is thrown away.
Is there a maximum file size?
There’s no hard-coded limit. The whole file must fit in your device’s memory while decoding, so very long files (over an hour) work best on a desktop browser. Rendering happens in 60-second chunks to keep memory use low.
Does it keep stereo or convert to mono?
Your channel layout is preserved: stereo stays stereo, mono stays mono. If a file has more than 2 channels, the first two are kept.
Can I convert other formats, like M4A or OGG?
Often, yes — the decoder supports whatever audio formats your browser can play, which usually includes WAV, OGG, FLAC, and M4A/AAC in addition to MP3. The drop box accepts any audio file; MP3 is simply the most common use case.
Why 44.1 kHz?
44.1 kHz is the CD-audio standard and the most universally accepted sample rate for WAV files. If your MP3 already uses 44.1 kHz it’s copied through untouched; other rates are cleanly resampled so the output always meets the spec.
It says the file couldn’t be decoded. What now?
That means your browser couldn’t parse the file as audio — usually a corrupt download, a mislabeled file (e.g., a video renamed to .mp3), or DRM-protected audio. Try re-downloading the file or playing it in your music app first to confirm it’s valid.

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