convt

Convert MP4 to MP3 Online Free

Convert MP4 to MP3 instantly in your browser. No uploads needed - your files stay private on your device.

drag & drop files here

or click to browse

images, videos, audio, documents - all processed locally

Why extract audio from MP4?

  • ✓Create audio-only versions for podcasts or music libraries
  • ✓Reduce file size when video content isn't needed
  • ✓Extract soundtracks, voiceovers, or background music
  • ✓Prepare audio for editing in dedicated audio software

How to convert MP4 to MP3

1

Upload your file

Drag and drop your MP4 file onto the converter, or click to browse your files.

2

Select MP3 as output

Choose MP3 from the format dropdown. The converter will automatically detect your file type.

3

Convert instantly

Your file is processed entirely in your browser using WebAssembly. No upload needed.

4

Download your file

Click the download button to save your converted MP3 file.

About MP4 format

MP4 is the most widely used video container format, supporting H.264/H.265 video codecs and AAC audio. It offers excellent compression while maintaining high quality, making it the standard for streaming, downloads, and video sharing. Nearly every device, platform, and media player supports MP4 playback.

Pros

  • +Universal device and platform support
  • +Excellent compression with H.264/H.265
  • +Supports subtitles and multiple audio tracks

Cons

  • -Lossy compression affects quality
  • -Editing can be complex without re-encoding
  • -Some advanced codecs may not play everywhere

About MP3 format

MP3 is the most recognized audio format worldwide, revolutionizing digital music distribution. Using lossy compression, MP3 achieves small file sizes while maintaining acceptable audio quality for most listeners. Its universal compatibility makes it the safest choice for sharing audio across any platform.

Pros

  • +Universal device and software support
  • +Small file sizes for distribution
  • +Widely understood by all users

Cons

  • -Lossy compression reduces audio quality
  • -Not ideal for professional audio
  • -Limited metadata compared to newer formats

Frequently asked questions

Is it safe to convert MP4 to MP3 online?↓
Yes, Convt processes your files entirely in your browser using WebAssembly. Your files never leave your device - no data is uploaded to any server. This makes it completely private and secure.
How long does MP4 to MP3 conversion take?↓
Conversion is typically instant for small to medium files. Larger files may take a few seconds depending on your device's processing power. Since everything runs locally, speed depends on your hardware rather than internet connection.
Is there a file size limit for conversion?↓
There's no artificial file size limit. However, very large files (over 500MB for video, 100MB for images) may strain your browser's memory. For best results, ensure you have enough available RAM.
Do I need to install any software?↓
No installation required. Convt runs entirely in your web browser. It works on any modern browser including Chrome, Firefox, Safari, and Edge on desktop and mobile devices.
Can I convert multiple files at once?↓
Yes, you can add multiple files to the converter and process them all. Each file will be converted individually and you can download them separately or together.
Can I extract audio from my MP4 video?↓
Yes! Select an audio format (MP3, WAV, OGG, etc.) as the output format to extract just the audio track from your video file.

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