Free · no signup · never uploaded
MP3 to WAV Converter
Decode an MP3 into an uncompressed 16-bit PCM WAV — ideal for editing, right in your browser, no upload.
Short answer
To convert MP3 to WAV, drop your .mp3 file below and download the uncompressed WAV. WAV is the raw PCM format audio editors and DAWs prefer for editing and mastering. It runs in your browser with ffmpeg — nothing is uploaded.
Why convert MP3 to WAV?
Audio editors, DAWs, and CD-burning tools often want an uncompressed WAV so they can process the raw samples without decoding on the fly. Converting your MP3 to WAV gives you that editable, standard PCM file. Expect a much larger file, since WAV is uncompressed.
Does it improve the quality?
No — and it’s important to be honest about this. Converting a lossy MP3 to WAV does not restore detail the MP3 already discarded; it just stores the decoded audio uncompressed. The WAV is convenient for editing, not higher fidelity than the source.
Audio formats compared
| Format | Compression | Size vs MP3 | What it's for |
|---|---|---|---|
| MP3 | Lossy | ~1× | Plays on literally everything |
| WAV | Uncompressed | ~10× | Editing masters; no quality loss |
| FLAC | Lossless | ~5× | Archiving; bit-perfect but compressed |
| M4A / AAC | Lossy | ~1× | Apple default; better than MP3 at low bitrates |
| OGG / Vorbis | Lossy | ~1× | Open format; common in games |
Converting a lossy file to a lossless one (MP3 → WAV or FLAC) cannot restore detail that was already discarded — it only makes the file bigger. Go lossy→lossless only when a tool or editor demands it, and always keep your original.
How we calculate this
Conversion happens locally in your browser with ffmpeg — here is exactly how:
- Load the engine. ffmpeg compiled to WebAssembly loads once in your browser from this site (self-hosted, not a third party) — your file is never uploaded.
- Decode. ffmpeg reads the MP3 file and decodes it to raw audio samples.
- Write WAV. the samples are written as an uncompressed 16-bit PCM WAV file and handed back as a download.
Assumptions
- Everything runs client-side; the file never leaves your device.
- WAV is uncompressed, so the output is much larger than the source.
- Decoding a lossy source to WAV does not restore detail already lost.
Last reviewed: July 19, 2026
Frequently asked questions
How do I convert an MP3 to WAV?+
Drop your .mp3 file in above and download the WAV the tool creates. The conversion runs in your browser with ffmpeg, so your file is never uploaded. The first conversion loads the converter (about 31 MB) once; after that it's instant.
Are my files uploaded?+
No. Everything runs 100% in your browser using ffmpeg compiled to WebAssembly, so your MP3 never leaves your device. It's private and works offline once the converter has loaded.
Does converting to WAV improve quality?+
No. An MP3 is already lossy, and converting to WAV just stores the decoded audio uncompressed — it can't recover detail the MP3 discarded. WAV is useful for editing, not for higher fidelity.
Why is the WAV so much bigger?+
WAV is uncompressed 16-bit PCM, so it stores every sample in full. A WAV is typically about ten times the size of the equivalent MP3 — that's expected.
What WAV format is produced?+
A standard 16-bit PCM WAV, which is the format audio editors, DAWs, and CD tools accept universally.
Is it free?+
Yes — no signup, no watermark, no per-file limit. It's ad-supported and runs entirely in your browser.
Related tools
- WAV to MP3 — compress a WAV back down to MP3.
- FLAC to MP3 — compress a lossless FLAC to MP3.
Audio is decoded entirely in your browser with ffmpeg and never uploaded. WAV is uncompressed 16-bit PCM.