Be Converter
Conversor de Áudio

Conversor de MP4 para MP3: Extraia Áudio de Vídeo

Extraia a faixa de áudio de qualquer vídeo MP4 e salve como MP3 a 192kbps. Rápido, grátis e privado.

Select MP4 Video

Drop your MP4 video here to extract its audio as MP3

or drag file here · Maximum 50MB · 1 file at a time

Related Conversions

MP3 → WAV
WAV → MP3
MP3 → OGG
OGG → MP3
WAV → OGG
AAC → MP3
FLAC → MP3
M4A → MP3

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Como usar

  1. 1

    Select MP4 Video

    Click the upload button or drag & drop your MP4 file

  2. 2

    Extract Audio

    Click Convert and the audio track is extracted and encoded to MP3

  3. 3

    Wait for Processing

    Processing runs locally with real-time progress tracking

  4. 4

    Download MP3

    Click "Download" to save your MP3 audio file

Porquê usar o Be Converter?

Browser-Based Processing

Extract MP3 audio from MP4 video entirely in your browser. No uploads, no server processing

192kbps Quality

MP3 output encoded at 192kbps with libmp3lame for a great balance of quality and file size

Fast Extraction

Audio is copied and encoded directly without processing video frames, so extraction is quick

Privacy & Security

Your video never leaves your device. All processing happens locally in your browser

Clean Output

No watermarks, no registration, no hidden limits on extracted MP3 files

Free & Unlimited

Convert as many MP4 videos to MP3 as you want. Completely free forever

Perguntas frequentes

How do I extract audio from an MP4 video?
Upload your MP4 file, click Convert, and download the resulting MP3. The audio track is extracted and re-encoded to MP3 at 192kbps — no software installation needed.
What quality is the extracted MP3?
Audio is encoded with the libmp3lame encoder at 192kbps, which is transparent quality for most music and speech. If the source audio bitrate is lower, the output keeps the original quality.
Does converting MP4 to MP3 lose quality?
MP3 is a lossy format, so re-encoding involves some compression. At 192kbps the difference from the original audio track is inaudible to most listeners.
What is the maximum file size?
You can convert MP4 videos up to 50MB in size. For longer videos, consider trimming the video first or extracting only the section you need.
Are my videos uploaded to a server?
No. All MP4 to MP3 conversion happens locally in your web browser using WebAssembly. Your files never leave your device.

About MP4 to MP3 Converter

Our MP4 to MP3 converter extracts the audio track from any MP4 video and saves it as a high-quality 192kbps MP3 file. Perfect for saving music from videos, creating podcasts from recordings, preserving lecture audio, or repurposing video soundtracks. Everything runs in your browser — files are never uploaded, making it both fast and private. Free with no registration.

Tips for MP4 to MP3 Conversion

  • MP3 at 192kbps is the sweet spot for music; use 320kbps sources when maximum fidelity matters
  • Extracted speech and lectures sound great at 192kbps and stay small enough to email
  • If you only need part of the audio, trim the MP4 first — extraction finishes much faster
  • The original audio track is copied directly when possible, avoiding unnecessary quality loss
  • Keep the MP4 original if you plan to re-encode later — every lossy conversion loses a little quality