Free tool
Free MP3 to WAV converter
Convert MP3 to WAV for software that wants uncompressed audio: audio editors, DJ and sampler software, CD burning tools, transcription services and phone systems.
Your MP3
Drag a file here, paste it, or choose one.
.mp3, .wav, .m4a, .aac, .ogg, .oga, .opus, .flac, .aif, .aiff. Up to 500 MB.
Up to 3 hours of audio.
Your file never leaves your browser. The conversion runs on this machine.
WAV is lossless, so there is no bitrate to pick.
More options
Trim
Leave both empty to keep the whole file. Seconds like 1:05.5 work too.
Result
Worked example
Measured on our own 27 second narration as a 192 kbps MP3, saved as 16 bit WAV.
Source MP3
623 KB
WAV, 44.1 kHz stereo
4.5 MB
Seven times the size, and exactly the same sound: WAV stores what the MP3 decodes to, nothing more. The gain is a file every editor opens and that is never compressed again.
1. Add your file. 2. Pick the output. 3. Convert in the tab. 4. Listen and download.
What Interlace does
Editing a voiceover to fit the pictures? Let the pictures fit the voice.
- Paste the script and pick a voice
- Interlace times every scene to the narration
- Voiceover in 28 languages from one script
Real Interlace output, unedited. Shown silent and sped up.
Your file
narration-final.mp3
To WAV for editing
Questions
Asked and answered
No. The file is read by the page and converted by ffmpeg compiled to WebAssembly, on your own machine. There is no upload step, and closing the tab discards everything.
No. The WAV holds exactly what the MP3 decodes to, nothing more. What you get is a file that every editor opens and that is not compressed again each time you export it.
Many business phone systems ask for WAV at 8 kHz, 16 bit, mono for hold music and menu prompts. Pick 8 kHz and Mono under More options. Check your system's guide first: some want µ-law encoding instead, which this tool does not make.
A 128 kbps MP3 stores about a tenth of the data of CD quality stereo. WAV stores every sample, 1,411 kbps at 44.1 kHz stereo. Mono halves that, and a lower sample rate cuts it further.
Up to 60 minutes per file. An hour of stereo WAV is already over 600 MB, and it all has to fit in the browser tab's memory.
Turn this into a video
Create an account and start from a document, script, or prompt.