Convert MP4 to WAV
Private by design: the conversion runs on your device. Nothing is uploaded.
- Choose the target format
- Drop your file (or click to browse)
- Download the converted file
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Output format: wav
Transcription services, forced alignment tools and audio editors all prefer uncompressed input, and handing them an MP4 usually ends in an unsupported format message. This page writes the video's audio track out as plain PCM in a WAV that any of them will open. Expect a large result: uncompressed sound costs about ten megabytes a minute, and that heft is the entire point of it.
Frequently asked questions
- Why pick WAV here instead of MP3?
- Because the next tool in the chain is a machine rather than an ear. Speech recognisers and editors work from raw samples, and feeding them a decoded MP3 adds compression artifacts for no benefit.
- What sample rate does the WAV use?
- Whatever rate the video already carried, which is 48 kHz for most recordings and 44.1 kHz for some older ones. Nothing is resampled behind your back.
- My interview runs an hour, how big is the file?
- Roughly 600 megabytes in stereo. Fold it down to mono in an editor afterwards if the transcription service caps how much you can upload.