MP4 to WAV Converter (Free, Online, No Upload)

Extract lossless WAV audio from any MP4 video right in your browser. Nothing gets uploaded to a server. WAV preserves full audio fidelity without compression artifacts, making it ideal for editing, transcription, or further processing. The conversion runs locally on your device.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

Use the API

curl -X POST https://renderio.dev/api/v1/run-ffmpeg-command \
  -H "X-API-KEY: ffsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
  "ffmpeg_command": "-i {in_video} -vn -c:a pcm_s16le -ar 44100 {out_audio}",
  "input_files": {
    "in_video": "https://example.com/input.mp4"
  },
  "output_files": {
    "out_audio": "output.wav"
  }
}'

Need an API key? Get your free API key to start processing files programmatically.

Common Variations

24-bit for professional audio

-i input.mp4 -vn -c:a pcm_s24le -ar 48000 output.wav

Mono at 16kHz for speech recognition

-i input.mp4 -vn -ac 1 -ar 16000 -c:a pcm_s16le output.wav

48kHz sample rate

-i input.mp4 -vn -c:a pcm_s16le -ar 48000 output.wav

Related Operations

Free Video to WAV Converter Online | RenderIO MP4 to MP3 Converter Online Free, No Upload | RenderIO WAV to MP3 Converter Online Free - No Upload | RenderIO Extract Audio from Video Online Free - No Upload | RenderIO

Need to process at scale?

Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.

Get your API key