Convert MP3 to WAV
Drop an MP3 and download a 16-bit PCM WAV at the same sample rate and channel count. A 44.1 kHz stereo MP3 becomes a 44.1 kHz stereo WAV; only the container and codec change.
Reach for this when something downstream refuses compressed input: a DAW import, a sampler, a speech pipeline, or a hardware player that reads PCM only.
WAV does not restore what MP3 removed
MP3 discards frequency detail the encoder predicts you will not hear, and that decision is final. Decoding to WAV stores the surviving audio without compression, so the file grows by roughly 7x while the content stays identical.
If you have the original master, convert that instead of the MP3.
Size and long files
Uncompressed audio is bulky. Exports stream to browser disk storage when it is available, which keeps memory flat no matter the duration. Without that storage there is a hard ceiling and an oversized job is refused rather than crashing the tab.
For a long lecture or interview, FLAC holds the same decoded audio at roughly 60% of the WAV size. Open the full Audio Converter to pick another output or set a bitrate.