MP3 to WAV

Plenty of software still wants WAV: older audio editors, DJ and karaoke systems, telephone IVR systems, game engines, some Arduino and Raspberry Pi sound modules, and speech-recognition tools that expect raw PCM. If all you have is an MP3, you need to decode it first.

This tool converts MP3 to WAV in your browser. It decodes the MP3 with the browser's own decoder and writes standard PCM WAV at 16-bit or 24-bit, with optional sample-rate conversion and mono mix-down — the settings those systems usually specify.

Your files are not uploaded. That matters when the MP3 is a call recording, a client's voice-over or an unreleased track.

A realistic expectation: WAV is an uncompressed container, so it will be large — about 10 MB per minute of stereo audio at 44.1 kHz. That size buys compatibility and frame-accurate editing, not extra fidelity. The WAV sounds exactly like the MP3 it came from, because decoding is lossless from that point onwards.

How It Works

1. Add MP3 files — up to 20. Only .mp3 files are accepted on this page; for other formats use the Audio Converter.
2. Pick WAV settings — 16-bit (CD standard) or 24-bit, keep the original sample rate or resample to 48, 44.1, 22.05 or 16 kHz, and keep stereo or mix to mono.
3. Write the WAV — decoded samples are written as a RIFF/WAVE file with a standard PCM header. Download each file or all of them as a ZIP.

Compatibility & Support

Supported Input → Output Formats

• Input: .mp3 (MPEG-1/2 Layer III, CBR or VBR)
• Output: .wav (linear PCM, 16-bit or 24-bit, little-endian)
• Sample rates: original, 48 kHz, 44.1 kHz, 22.05 kHz, 16 kHz

Unsupported Formats

ID3 tags (title, artist, album art) are not written into the WAV — WAV has only limited metadata support and many players ignore it. 8-bit and 32-bit float WAV output are not offered. Very long files (over about an hour) may exceed phone memory.

Some telephone systems need 8 kHz µ-law or A-law WAV, which is a different encoding from the PCM this tool writes. If your provider specifies µ-law, create a 16 kHz mono PCM file here and let the provider's upload page convert it, or ask them which PCM settings they accept.

File Size Limits

Up to 20 files per batch and 300 MB per file. Audio is decoded to uncompressed samples in memory, so a one-hour stereo recording needs roughly 1.3 GB of RAM while it is processed. On phones, split long recordings or convert them one at a time.

Who Should Use This Tool?

• Students: A music-technology student converts MP3 samples to WAV so they load in a university DAW that rejects compressed files.
• Freelancers & Designers: A game developer converts MP3 sound effects to 16-bit, 44.1 kHz WAV for an engine that only imports PCM.
• Office Professionals: A call-centre supervisor converts recorded MP3 greetings to 16-bit mono WAV because the phone system's admin panel only accepts WAV uploads.
• Developers: A developer prepares 16 kHz mono WAV clips from MP3 test recordings for a Whisper or Vosk speech-recognition pipeline.

Why This Tool Beats the Alternatives

• Exact control over bit depth, sample rate and channels.
• Recordings are never uploaded to a server.
• No file-length cap or daily limit.
• No software install — works on Windows, macOS, Linux and Chromebooks.
• Clear about the fact that WAV cannot restore MP3 quality.

Pro Tips

• Match the target system's spec exactly — many IVR and embedded systems reject a WAV with the wrong sample rate or with stereo channels.
• Use 24-bit only if you will process the audio further (EQ, mastering); for playback 16-bit is plenty.
• If the WAV is too large to email, send the MP3 and convert on the receiving side — or compress with Audio Compressor.

Add your MP3 files above, choose the WAV format you need, and download.