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How to Extract Audio from MP4 Video

Convert any MP4 video to MP3 audio format in your browser. Fast, free, and private — no server upload.

Extracting audio from video is useful for creating podcasts from recorded talks, saving music from videos, or converting lectures for offline listening.

ConvertCraft's Video to Audio tool uses WebAssembly-powered FFmpeg to extract the audio track from MP4 files directly in your browser. No upload is needed.

Open the tool, select your MP4 file, choose MP3 as the output format, and click Convert. The audio track is extracted in seconds for typical video files.

You can adjust the output quality (bitrate) from 64 kbps to 320 kbps. For spoken-word content, 128 kbps is sufficient. For music, 256–320 kbps is recommended.

The tool supports MP4, WebM, MKV, and AVI inputs, and can output to MP3, AAC, OGG, WAV, and FLAC formats.

Open Video to Audio Converter →

Frequently Asked Questions

Does converting MP4 to MP3 lose quality?

If the original video contains AAC audio, converting to MP3 involves re-encoding which introduces a minor quality loss. For lossless extraction, choose WAV or FLAC output.

How long does it take to extract audio?

Processing time depends on file size and your device. A 5-minute video typically converts in 10-30 seconds on a modern device.

Can I extract audio from YouTube videos?

ConvertCraft works with local files only. You need to have the video file saved on your device first.