MP4 to MP3 Converter
Extract the audio from an MP4 video and save it as an MP3 — right in your browser.
MP4 is a video container, but most of the time you only want the sound — a song, a podcast, a lecture, or a voice note buried inside the clip. MP3 is the universal audio format that plays on every phone, car stereo, and music app.
This tool pulls the audio stream out of your MP4 and re-encodes it to MP3 locally. Your video never leaves your device — nothing is uploaded.
How to convert MP4 to MP3
- 1Drop your MP4 file into the area above — or click to browse.
- 2The output format is already set to MP3. Adjust the quality settings if the format supports them.
- 3Click convert, then download your MP3 file. Everything runs locally — nothing is uploaded.
Frequently asked questions
No — it discards the picture and keeps only the audio, saving it as a standalone MP3 file. The original MP4 on your device stays untouched.
For music, 256 or 320 kbps keeps it crisp. For speech like podcasts or lectures, 128 kbps is plenty and produces a much smaller file.
No. All processing happens entirely in your browser. Your data never leaves your device — nothing is uploaded to any server.
Yes. Once the page has loaded, the tool works completely offline. For the best experience, install PrivaDeck as a PWA from your browser.
Other conversions
Read the full guideNeed a different format?
Open the full audio converter to pick from MP3, WAV, OGG, AAC, FLAC, M4A and Opus, convert in batches, and adjust bitrate, sample rate and channels.
Open the full Audio Converter