MP4 to MP3 Converter Online
Convert MP4 video files to MP3 audio in your browser. Drop a video, extract the audio track, download a clean 192 kbps MP3 — no upload, no watermark.
How to Convert MP4 to MP3 in 3 Steps
No account. No upload. Just drop your MP4 and extract the audio.
Drop Your MP4 File
Drag and drop a .mp4, .m4v, or .m4a file — or click to browse. Files up to 200MB, any resolution from 480p to 4K.
Click Convert
The MP4 is decoded locally, the audio track is extracted, and the video stream is discarded.
Download MP3
Your 192 kbps MP3 downloads automatically with the same filename, ready to play anywhere.
We extract the audio track and discard the video. Your MP4 file never plays back.
Why Notevibes MP4 to MP3 Converter
Built for speed, privacy, and compatibility.
Audio Track Extraction
We read the MP4 container, pull out just the audio stream, and discard the video. The result is a clean MP3 with nothing but sound.
192 kbps Output
Every MP3 is encoded at 192 kbps — a safe balance of quality and file size that works on every phone, car stereo, and MP3 player.
Privacy First
Nothing is uploaded. Your MP4 file is decoded and the audio re-encoded locally in your browser — it never leaves your device.
No Upload
Zero server traffic. The entire conversion happens in-browser, so there is no queue, no waiting, and no backend file size limit.
Instant Download
Click Convert and the MP3 lands on your device seconds later. No ads, no interstitials, no sign-up, no watermark.
Works on Mobile
Convert MP4 videos on your phone or tablet. Works on iOS and Android, in Chrome, Safari, Firefox, and Edge.
Your MP4 Stays on Your Device
Every conversion is processed locally in your browser using the Web Audio API. Nothing is uploaded, stored, or analyzed.
No Upload
MP4 never leaves your device
No Account
Start converting immediately
No Tracking
We never see your file
When You Actually Need MP3 from an MP4
Common reasons people rip the audio out of an MP4 video file.
Music Videos to MP3
Turn any music video MP4 into an MP3 you can add to your library
Podcast Video to Audio
Strip the audio from a video podcast so you can listen on the go
Voice Memos in MP4
Extract audio from MP4 voice memos so every app and device can play them
Screen Recording Audio
Pull narration and voiceover out of screen recordings saved as MP4
Zoom MP4 Recordings
Convert downloaded Zoom MP4 meeting recordings into portable MP3 files
Conference Talks
Turn keynote and conference MP4 recordings into audio for commute listening
Need More Than a Converter?
The full Notevibes Online Audio Editor lets you trim, merge, record voice, remove vocals, clean up podcasts, add fades, and mix multiple tracks — all in your browser, exporting to MP3 or WAV.
Open Full Audio EditorRelated Audio Tools
More free browser audio tools from Notevibes — no sign-up, no upload.
Frequently Asked Questions
How do I convert MP4 to MP3 online for free?
Drop your MP4 file onto the converter above, click Convert to MP3, and the audio track is extracted and downloaded as a 192 kbps MP3. The whole conversion runs in your browser — no upload, no sign-up, completely free.
What if my MP4 has no audio track?
If the MP4 file contains only video with no audio stream, the converter will show an error. There is nothing to extract — a silent video cannot be turned into an MP3.
Is the MP4 to MP3 converter free?
Yes. Completely free. No sign-up, no watermark, no ads, no limits on how many files you can convert. Max file size is 200MB.
Is my MP4 file uploaded to a server?
No. The converter runs entirely in your browser using the Web Audio API. Your video never leaves your device — nothing is uploaded or stored anywhere.
What is the output bitrate?
Every MP3 is encoded at a clean 192 kbps — a safe balance of quality and file size that plays cleanly on phones, car stereos, and every MP3 player made in the last 20 years.
Does it work with large MP4 files?
Yes. MP4 files up to 200MB are supported. That covers most hour-long video recordings, Zoom meetings, and full-length video podcasts.
Can I convert 4K MP4 videos?
Yes — we only care about the audio track, so the video resolution does not matter. 4K, 1080p, 720p — they all give you the same 192 kbps MP3 from the embedded audio stream.
What happens to the video portion of my MP4?
It is discarded. We extract only the audio track from your MP4 file — the video stream is never saved, displayed, or uploaded anywhere. Your MP4 file never plays back.