🎬 MP4 to MP3
Convert MP4 to MP3 — Free & Private
Extract and save the audio track from any MP4 video as an MP3 file. Perfect for saving music videos, lectures, podcasts, and interviews as audio.
✓ Free forever✓ No upload✓ No signup✓ Instant
Ready to convert your MP4 to MP3?
100% in your browser · FFmpeg-powered · Instant download
How to Convert MP4 to MP3
1
Open the Converter
Click "Convert Now" — opens on the Video tab with MP4 → MP3 pre-selected.
2
Upload Your MP4
Drag & drop your video file or click Browse. Up to 500 MB supported.
3
Convert Instantly
FFmpeg runs entirely in your browser — no server upload needed.
4
Download MP3
Your converted file downloads automatically, ready to use.
Why Convert MP4 to MP3?
- 🎬 Extract audio from videos — save music videos, lectures, and interviews as MP3
- 💾 Portable audio — listen to video content anywhere without needing to watch the video
- 📦 Batch support — convert multiple files at once with Batch Convert mode
- 🔐 100% private — files stay on your device, never uploaded to any server
- 🆓 Free forever — no watermarks, no limits, no credit card
- ⚡ Instant — FFmpeg WebAssembly runs directly in your browser
Features
100% Private
Files never leave your browser. Zero server uploads.
FFmpeg-Powered
Industry-standard FFmpeg runs as WebAssembly in your browser.
Free
No account, no fee, no watermarks. Ever.
Batch Convert
Convert multiple MP4 files to MP3 in one go.
High Quality
Output quality matches the original source video.
Mobile-Friendly
Works on any device — phone, tablet, desktop.
Frequently Asked Questions
Yes, completely free with no limits or watermarks. Convertlo runs entirely in your browser.
No. All conversion happens locally in your browser using FFmpeg compiled to WebAssembly. Your files never leave your device.
Yes. The conversion preserves video quality at a high bitrate setting. Output quality depends on the original file quality.
Extract audio from videos — save music videos, lectures, and interviews as MP3
Yes — enable Batch Convert mode to process multiple MP4 files at once, each producing its own MP3 output.