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MP4 to MP3 Converter

Convert MP4 to MP3 in seconds without uploading anything — the audio track is decoded and re-encoded right in your browser. It works as a general video to MP3 converter too: MOV, WebM and MKV files rip just the same. Pick 128, 192 or 320 kbps, listen to the result before saving, and download. Free, private, unlimited.

  • No upload — files stay on your device
  • Works offline once loaded
  • Free forever, no signup, no watermark
Drop your {{ sourceLabel }} here, or tap to choose The audio is pulled out on your device — nothing is uploaded
Reading the file…
  • File {{ sourceSizeLabel }}
  • Duration {{ durationLabel }}
  • Audio track {{ audioCodecLabel }}

This file is over 500 MB. It will still work — audio extraction only reads the audio track — but give it a moment.

Encoding MP3 at {{ kbps }} kbps… {{ progress }}%

Listen before you save
  • Original video {{ sourceSizeLabel }}
  • MP3 {{ resultSizeLabel }}
  • Length {{ durationLabel }}

How to use this tool

  1. Drop your MP4 (or any video)

    The tool reads the audio track's codec and the clip's length before converting — if a video has no sound at all, it says so instead of producing a silent MP3.

  2. Choose MP3 quality

    128 kbps for voice and lectures, 192 kbps for general use, 320 kbps for music. Higher bitrate = bigger file.

  3. Convert, listen, download

    An audio player lets you check the MP3 before saving it — no surprises after download.

Questions people ask

How do I convert MP4 to MP3?

Drop the MP4 here, pick a bitrate, and hit Extract MP3. The audio track is decoded and re-encoded entirely in your browser — a 5-minute video usually takes a few seconds because only the audio is processed, never the picture.

What bitrate should I choose?

128 kbps is plenty for voice notes, lectures and podcasts. 192 kbps is transparent for most listening and most people. 320 kbps is for music you care about — the ceiling of what MP3 can do.

Does converting to MP3 lose quality?

MP3 is a lossy format, so technically yes — but at 192–320 kbps the difference from the source is inaudible for nearly all content and listeners. The source audio in an MP4 is usually AAC, itself lossy, so keep the bitrate at or above the original's to avoid stacking losses.

Can I convert other video formats, not just MP4?

Yes — despite the page name, MOV, WebM and MKV files work identically. Whatever container the video is in, only its audio track is read and converted.

Is my video uploaded to a server?

No. The file is read locally and the MP3 is encoded by your own browser — nothing is transferred anywhere, which is also why there is no file size cap and no daily limit.

Which browsers can encode MP3?

Chrome and Edge from version 130 onward include a built-in MP3 encoder. On a browser without one, the tool tells you straight away rather than failing at the end.

Related tools

Free because it costs us nothing to run: your browser does the work, not our servers. Made by Dynamb Technologies — we build software for businesses.