Extract the audio from an MP4 video and save it as MP3, free, no upload.
Open Extract AudioSometimes you only want the sound: a song from a music video, the audio of a lecture or podcast, a voice memo recorded as video. Converting MP4 to MP3 pulls just the audio stream out of the video and saves it as a small MP3 that plays on every device and music app, with no video weighing it down.
The audio is decoded from the MP4 and re-encoded to MP3 at the bitrate you choose. At 320 kbps the result is effectively transparent for music; 128 kbps is plenty for voice and keeps the file tiny.
| Format | File Size | Quality | Compatibility | Use Case |
|---|---|---|---|---|
| MP3 | Small | High (lossy) | Universal | Music, podcasts, every player |
| M4A (AAC) | Smallest | High (lossy) | Apple, modern players | Smaller files, Apple devices |
| WAV | Large | Lossless (PCM) | Universal | Editing, mastering |
| MP4 | Large | Video + audio | Universal | The original video |
Open the MP4 to MP3 converter
Click the button above or go directly to /tools/extract-audio. No signup required- the tool is free and works instantly in your browser.
Drop your files
Drag and drop your MP4 files onto the upload area, or click to browse. You can convert up to 20 files at once on the free plan (500 on Pro).
Download your MP3 files
Click Download on each file or use Download All as ZIP to save everything at once. All processing happens in your browser- nothing is uploaded to a server.
Complete privacy
Your files never leave your device. All conversion happens inside your browser using the Canvas API and WebAssembly.
Instant results
No upload, no queue, no waiting for a server. Conversion starts the moment you drop your files.
True batch processing
Convert up to 20 files at once on free (500 on Pro) and download them all as a ZIP. No signup required.
Always free
Core conversion tools are free forever. No watermarks, no file size caps on common formats, no account required.
How do I convert MP4 to MP3 without uploading?
Drop your MP4 into SammaPix's Extract Audio tool, choose MP3, and download. The audio is decoded and encoded to MP3 entirely in your browser, so the video never leaves your device.
Does MP4 to MP3 lose quality?
MP3 is a lossy format, so there is a re-encode. At 192 to 320 kbps the difference is inaudible for almost everyone, especially for voice and casual listening.
Is there a watermark or a length limit?
No watermark. Free covers files up to 500 MB, which is a long video; larger files are available with Pro or a Day Pass.
Can I get M4A instead of MP3?
Yes. The same tool also outputs M4A (AAC), which is slightly smaller at the same quality and ideal for Apple devices.
Ready to convert? It takes less than 10 seconds.
Open Extract Audio