Convert MP3 to WAV, Free
Files convert instantly in your browser. 100% private, any file size, no account needed.
Drop your MP3 file here
or click to browse. Any file size.
Conversion runs entirely in your browser. Your file never leaves your device.
How to convert MP3 to WAV
MP3 is a lossy compressed format: when an MP3 is encoded, audio data that psychoacoustic models predict you will not notice is discarded permanently. WAV stores uncompressed PCM samples with nothing discarded. Converting an MP3 to WAV does not recover the lost audio, but it does give you an uncompressed file that works in every piece of professional audio software, video editor, and broadcast system that requires uncompressed input.
This converter decodes the MP3 bitstream entirely in your browser using WebAssembly and writes the resulting PCM samples as a standard WAV file. No audio is uploaded to a server. The output file preserves exactly the audio that the MP3 decoder produces, at the sample rate and channel configuration of the source file.
Upload the MP3
Drop your .mp3 file onto the converter. Files of any bitrate and any length are accepted. All processing happens locally in your browser.
Choose bit depth if needed
Most video editing software accepts 16-bit WAV. Some professional audio applications prefer 24-bit. Leave at 16-bit unless your target software requires otherwise.
Convert in browser
The MP3 decoder reads each audio frame and writes the decoded PCM samples into a WAV file. A 4-minute 128 kbps MP3 (about 4 MB) becomes roughly 40 MB as a 44,100 Hz 16-bit stereo WAV.
Download and use
Download the WAV file. Import it into your video editor, audio software, or broadcast system. The file is immediately compatible with any application that reads standard PCM WAV.
Frequently asked questions
Will the WAV sound better than the MP3?
No. Converting from MP3 to WAV expands the file without recovering lost audio information. The quality is identical to the MP3 source. If you want better audio quality, you need a higher-quality source file.
Why does video editing software require WAV instead of accepting MP3?
MP3 uses a variable bit reservoir and frame-level compression that makes sample-accurate seeking difficult. Uncompressed WAV maps every sample to an exact time position, which is what frame-accurate video editing requires for reliable synchronization.
Is the MP3 uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly. Nothing is uploaded.
What sample rate will the output WAV use?
The output uses the same sample rate as the MP3 source: typically 44,100 Hz for music and 22,050 or 44,100 Hz for voice content. You can override this in the settings if your target system requires a specific rate.
Can I batch-convert many MP3 files at once?
This page handles one file at a time. For batch conversion, FFmpeg handles this well from the command line: for f in *.mp3; do ffmpeg -i "$f" "${f%.mp3}.wav"; done