Queue MP4 files
Choose one or more non-empty .mp4 files up to 100 MB each. Each queue row retains its own source and conversion status.
Free online MP4 to MP3 converter
Create MP3 audio copies from MP4 files.
Queue MP4 files with audio, make a new MP3 from the first audio stream, then listen to and download each result.
- Files not stored
- Queue MP4 files
- 100 MB each
Processed by our self-hosted conversion engine
Supported files
MP4 in. MP3 out.
MP4MP3
Add MP4 files with audio up to 100 MB each. Fileverses creates a new MP3 result with this route's documented conversion profile; review the completed download before using it elsewhere.
How it works
One queue. A new MP3 file.
Create MP3 audio copies
Start the queue to have server FFmpeg map the first audio stream from each readable MP4, exclude video, and encode a new LAME MP3 at VBR quality setting 2.
Listen and download
Inspect every completed MP3 in the queue, then download that separately named audio result.
Limits and quality
A new MP3 file, with source-specific trade-offs.
Each result is a newly encoded LAME MP3 using VBR quality setting 2, not copied MP4 audio. It has no fixed bitrate or promised output size and cannot recover earlier audio detail.
Convert MP4 nowMP4 sources with audio
This route accepts non-empty .mp4 files up to 100 MB each. The selected file must be readable by the host FFmpeg installation and contain an audio stream.
New lossy MP3 encoding
Each result is a newly encoded LAME MP3 using VBR quality setting 2, not copied MP4 audio. It has no fixed bitrate or promised output size and cannot recover earlier audio detail.
First audio stream only
The profile maps only the first audio stream, removes source metadata and chapters, and excludes video. It does not preserve alternate audio tracks, subtitles, attachments, original codecs, or metadata, and has no trimming, stream-selection, bitrate, or quality controls.
MP4 to MP3 FAQ
Questions, answered.
What MP4 files can I convert to MP3?+−
This converter accepts non-empty .mp4 files up to 100 MB each. FFmpeg must be able to read the MP4 and find an audio stream for conversion to succeed.
What does the downloaded MP3 contain?+−
A successful result is a newly encoded MP3 made with the LAME encoder at VBR quality setting 2. It contains only the first audio stream from the MP4.
Does MP4 to MP3 keep the video?+−
No. This is an audio-only conversion. The profile excludes video and writes an MP3 file, so no MP4 video stream is included in the download.
Can I convert several MP4 files at once?+−
Yes. Add multiple supported MP4 files to the queue. The browser submits one real server-side conversion at a time, and every successful row receives its own MP3 player and download button.
Will the MP3 have a fixed bitrate or smaller size?+−
No. The route uses LAME VBR quality setting 2 instead of a fixed bitrate. The result size depends on the source and the encoder output.
Does this keep alternate audio tracks or metadata?+−
No. The profile maps only the first audio stream, removes source metadata and chapters, and excludes video. It does not promise alternate-track, subtitle, attachment, original-codec, or metadata preservation.
Can I trim the MP4 or choose MP3 settings?+−
No. This route has no trimming, stream-selection, bitrate, or quality controls. It uses its fixed LAME VBR-quality-2 profile.
Are files kept after conversion?+−
Each source and output exists in a temporary server directory only while its conversion runs. The directory is removed whether the job succeeds or fails.