What this tool does
Video to MP3 Converter extracts the audio track from any browser-compatible video file and saves it as a high-quality WAV audio file. You upload a video (MP4, MOV, WebM, or similar), and the tool decodes the audio data, converts it to uncompressed PCM format, and provides a downloadable WAV file. Everything runs entirely in your browser using the Web Audio API, so no files ever leave your device.
How it works
The tool uses your browser's built-in AudioContext to decode the audio stream embedded in the video file. Once decoded, the raw audio samples are converted into a standard WAV file with a proper RIFF header. The conversion preserves the original sample rate and channel layout (mono or stereo) from the source video.
**Output format:** \`\`\` WAV File Size = Sample Rate x Bit Depth x Channels x Duration / 8 + 44 bytes (header) \`\`\`
The WAV format uses 16-bit PCM encoding, which is lossless and compatible with virtually all audio software.
Supported formats
- **MP4 (.mp4)** — The most common video format, widely supported across all browsers - **WebM (.webm)** — Open format with excellent browser support - **MOV (.mov)** — Apple QuickTime format, supported in Safari and most modern browsers - **OGG (.ogg)** — Open multimedia format supported in Firefox and Chrome - **AVI (.avi)** — Older format with varying browser support depending on codecs
Browser support for specific video codecs varies. If a file fails to load, try converting it to MP4 first.
Who should use this
- **Content creators** pulling audio from screen recordings or video clips for podcasts or voiceovers - **Musicians** extracting audio from performance videos for editing or sampling - **Students and researchers** capturing audio from lecture recordings or presentations - **Anyone** who needs the audio from a video file without installing desktop software
How to use
1. Drop or select a video file using the upload area 2. Review the detected file information (duration, channels, sample rate) 3. Click "Extract Audio" to begin the conversion 4. Download the resulting WAV file
FAQs
**Q: Why is the output a WAV file instead of MP3?** A: Encoding MP3 requires a specialized codec library. WAV files are uncompressed and can be created natively in the browser with no dependencies. WAV preserves full audio quality and can be converted to MP3 using any audio editor afterward.
**Q: Is there a file size limit?** A: The tool runs entirely in your browser, so the limit depends on your device's available memory. Videos under 500 MB generally work well. Very large files may cause the browser to slow down.
**Q: Are my files uploaded anywhere?** A: No. All processing happens locally in your browser. Nothing is sent to a server.
**Q: Why did my video fail to load?** A: Some video codecs are not supported by all browsers. Try a different browser, or convert the video to MP4 (H.264) format first, which has the broadest compatibility.
**Q: Can I extract audio from a specific portion of the video?** A: This tool extracts the entire audio track. To trim, open the downloaded WAV in an audio editor and cut to the desired section.
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