Step 1: Provide your MP4 files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted WAV files.
MP4 to WAV Conversion FAQ
How do I extract just the audio track from MP4 as WAV?
+
Upload the MP4 file and the converter demuxes the audio stream from the MP4 container, then transcodes it into WAV. Video frames are discarded — no second video pass, no quality loss beyond what the WAV codec itself introduces. MP4 is ISO/IEC 14496-14, standardised in 2001 and derived from the same QuickTime box layout MOV uses. WAV is Microsoft and IBM’s RIFF-based audio container from 1991, and it is what almost every audio interface and DAW writes on record.
Does converting MP4 to WAV improve the audio quality?
+
No, and it is worth being blunt: nothing can. The MP4 already discarded detail during its original encode, and wrapping what remains in a lossless WAV preserves exactly that — no more. The file gets several times larger and sounds identical. It is still the right move before editing, because WAV will not add a second generation of artefacts when you export. WAV is the correct format for editing, mastering and archiving, because it can be re-encoded any number of times without accumulating artefacts. MP4 only supports one widely-honoured subtitle format (mov_text), and multi-track audio is unreliable outside desktop players.
Which audio track gets extracted when my MP4 has several?
+
One track, picked automatically: normally the main one, the track with the most channels. This page has no setting to choose a different track and does not list the tracks in the file. If you need commentary or a dub instead, remux the MP4 with that track first (VLC or ffmpeg can do this) and convert it again.
What bitrate does the WAV file use?
+
A lossy WAV is encoded at 192 kbps by default. The Audio Quality setting also offers 320 kbps for the best quality and 128 kbps for a smaller file. A lossless WAV (WAV, FLAC) ignores the bitrate and keeps every sample. WAV normally stores raw uncompressed PCM — every sample kept exactly, at whatever bit depth and sample rate was captured.
Will going from MP4 to WAV reduce my audio quality?
+
If the WAV format is lossless (WAV, FLAC, ALAC), every original sample is preserved. If WAV is lossy (MP3, AAC, OGG, Opus), the codec recompresses — at 192 kbps the difference is inaudible for most content; at 96 kbps you may hear cymbals or sibilants softening. The MP4 container has no influence on this — only the codec settings matter.
Does the extracted WAV keep the MP4 sample rate?
+
By default yes — 48 kHz MP4 audio becomes 48 kHz WAV audio, 44.1 kHz becomes 44.1 kHz. If you need to downsample for compatibility (e.g. 96 kHz studio masters to 44.1 kHz CD-quality WAV) the sample-rate dropdown does this with high-quality resampling.
Can I batch-extract WAV audio from a folder of MP4 files?
+
Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
How long does extracting WAV from a 1-hour MP4 take?
+
It depends on the size and length of the file. Small documents and images are usually ready quickly. Long videos take the longest, because most video conversions re-encode every frame.
Is my MP4 private during audio extraction?
+
Yes. Uploaded MP4 files are processed on our own conversion servers, no person reviews them, and they are never shared. The upload and the converted WAV are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
Why does my WAV have silent gaps or wrong audio?
+
Usually the MP4 carries more than one audio track and the one that was converted is silent or secondary. The converter picks one audio track automatically, normally the main one, and this page has no setting to choose a different track. If the wrong one comes out, remux the MP4 with the track you want first (VLC or ffmpeg can do this) and convert it again.
