16-bit, 48 kHz stereo
The fixed PCM preset is designed for broad compatibility with video editors and transcription workflows.
MP4 to WAV Converter
Convert MP4 audio to 16-bit, 48 kHz stereo WAV in your browser. Trim the useful range, estimate the larger PCM output, and keep the MP4 on your device.
Local conversion workspace
Convert video to audio
Your video stays on this device. Processing starts only after you click Convert.
0 bytes uploaded
0 bytes uploadedMulti-thread mode is used only when this browser supports SharedArrayBuffer and cross-origin isolation.
MP4 to WAV
A defined PCM file for post-production
Create a predictable editing intermediate and understand its real storage cost.
No new perceptual compression
WAV avoids another AAC or MP3 stage, but it cannot restore information already removed from the MP4 audio.
Visible size estimate
At this preset, one minute is roughly 11 MB, so trimming is important for long recordings.
Editing workflow
How to convert MP4 to WAV
Prepare only the material needed for editing, analysis, or transcription.
Select the final MP4
Use the actual source you want to edit and confirm that it contains an audio stream.
Trim unnecessary footage
Remove slates, waiting time, or unrelated sections before creating the much larger PCM output.
Download and preserve the source
Import the WAV into the next application, but keep the original MP4 as the source of truth.
Private by implementation
Interviews and meetings stay local
PCM decoding and WAV writing occur in the browser Worker on the current device.
- No remote conversion queue
- No account or watermark
- Output estimates protect against unsafe browser memory use
FAQ
MP4 to WAV questions
Details about PCM quality, sample rate, channels, size, and editing.
The output PCM is uncompressed. The whole history is only lossless if the source audio in the MP4 was not previously encoded with a lossy codec.
The 16-bit, 48 kHz stereo preset uses about 192,000 bytes per second, or roughly 11 MB per minute before small overhead.
48 kHz is the common audio sample rate for video production and avoids format uncertainty in downstream editors.
No. The current preset writes two output channels for predictable compatibility; custom mono and channel controls are not exposed.
No. It avoids adding another lossy encode but cannot restore frequencies or transients already discarded by AAC.
An uncompressed WAV can be much larger than its MP4 input. The converter blocks estimated outputs that are unsafe for a reliable browser download.