Does MP4 to MP3 keep the video?

No. The output is audio only. Keep the original MP4 if you need the picture, subtitles, or alternate video tracks.

What bitrate should I choose?

192 kbps is a practical default for music and clear speech. Use a higher bitrate for detailed music and a lower one only when file size is the priority.

Is the audio quality identical to the MP4 soundtrack?

No. MP3 is lossy and the audio is re-encoded. The result can sound very close at a high bitrate, but it is not a bit-for-bit copy.

Can I extract audio from a protected video?

No. Copy-protected or DRM-encrypted files are not supported. Use media you have the right to convert.

Are multiple audio tracks preserved?

The conversion selects one audio stream for the MP3. Alternate languages, commentary tracks, and spatial mixes may not be preserved.

How large can the MP4 be?

Server uploads are limited to 100 MB per file. Long videos may also be constrained by processing time, so shorter clips convert more predictably.

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Convert MP4 to MP3 Online

Convert MP4 video to MP3 audio for listening, podcasts, or audio-only sharing. FFmpeg extracts and re-encodes the audio on the server, with a default 192 kbps bitrate and adjustable quality. It is free, supports batches, and accepts files up to 100 MB.

Convert .MP4 to .MP3

Select a file to begin. Processing details and limits are listed below.

Or paste from clipboard with Ctrl+V

How to convert MP4 to MP3

1
Upload MP4 files
Add one or more MP4 videos to the queue. The server reads the audio stream from the container.
2
Set the MP3 bitrate
Choose a bitrate in Options. Use 192 kbps or higher for music and speech that must stay clear; lower values save space.
3
Convert and download
Run the conversion and download the MP3 files individually or as a ZIP.

MPEG-4 Part 14 video vs MPEG-1 Audio Layer III

Spec	MPEG-4 Part 14 video	MPEG-1 Audio Layer III
MIME type	video/mp4	audio/mpeg
Format type	video	audio
Standard	ISO/IEC 14496-14	ISO/IEC 11172-3 and 13818-3
First release	2003	1993
Browser support	All current major browsers for common codecs	All current major browsers
Contents	Container for video, audio, subtitles, and metadata. Common payloads include H.264, H.265, AV1, AAC, and MP3.	Lossy compressed audio using psychoacoustic models; optional ID3 metadata such as artist and cover art.

About MPEG-4 Part 14 video

Broad device support, efficient streaming, flexible codec choices, and good compatibility with social platforms. Compatibility depends on the codecs inside the container, not only the .mp4 extension; advanced subtitles and chapter support vary.

Format reference

About MPEG-1 Audio Layer III

Exceptionally broad support, small files, and easy streaming or playback on almost every device. Lossy compression discards audio information; quality depends on bitrate, encoder, and source.

Format reference

Why convert MP4 to MP3?

Keep the audio from a recording without carrying the video file size.
Create a podcast or music copy that plays on almost any device and audio app.
Extract a speech track for transcription, note taking, or language practice.
Reduce bandwidth when the visuals are not needed.

Will quality change?

MP3 is lossy, so the audio is re-encoded and cannot be identical to the original soundtrack. A higher bitrate preserves more detail, while a lower bitrate reduces size and can introduce artifacts. Video, subtitles, and alternate audio tracks are not part of the MP3 output.

Processing and limits

Processing: Server-side
Engine: FFmpeg with libmp3lame
Maximum size: 100 MB per file.
Batch support: Yes, multiple MP4 files can be queued.
Quality controls: Adjustable audio bitrate. The default is 192 kbps; higher values preserve more detail and increase file size.

The MP4 is uploaded over HTTPS and FFmpeg extracts the audio stream, encodes it as MP3, and returns the audio file. Temporary input and output files are removed after the request.

Video and subtitles are discarded; only an audio track is produced.
MP3 re-encoding is lossy, and copy-protected files are not supported.
Only one audio stream is selected, so alternate languages or commentary tracks may not be preserved.

Platform compatibility

MP3 plays almost everywhere: Windows Media Player, macOS Music, Linux players, iOS, Android, car stereos, and every current browser. That makes it the safest audio-only delivery format for a mixed audience.

When not to convert

Keep the original MP4 if you may need the video, subtitles, or multiple audio tracks later.
Do not use MP3 for a mastering or archival workflow where lossless audio matters.
If the source is copy-protected, use an authorized copy rather than a converter.

Frequently asked questions

Does MP4 to MP3 keep the video?: No. The output is audio only. Keep the original MP4 if you need the picture, subtitles, or alternate video tracks.
What bitrate should I choose?: 192 kbps is a practical default for music and clear speech. Use a higher bitrate for detailed music and a lower one only when file size is the priority.
Is the audio quality identical to the MP4 soundtrack?: No. MP3 is lossy and the audio is re-encoded. The result can sound very close at a high bitrate, but it is not a bit-for-bit copy.
Can I extract audio from a protected video?: No. Copy-protected or DRM-encrypted files are not supported. Use media you have the right to convert.
Are multiple audio tracks preserved?: The conversion selects one audio stream for the MP3. Alternate languages, commentary tracks, and spatial mixes may not be preserved.
How large can the MP4 be?: Server uploads are limited to 100 MB per file. Long videos may also be constrained by processing time, so shorter clips convert more predictably.

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