Free Converter to MP3 — No Upload, No Registration
Convert video to MP3, opus to MP3, AAC to MP3, MP3 to MP4. Works entirely in your browser. Download mp3 converter free — fast, private, no ads.
Drag & drop your files here
or click to browse
Supports: MP4, MKV, AVI, WebM, MOV, MP3, AAC, WAV, FLAC, OGG, Opus, M4A
🔒 Your files never leave your device. 100% private, zero server storage.
All Formats Supported — Opus to MP3, AAC to MP3, Video to MP3
Convert any audio or video file. Free mp3 converter download, no registration required.
Video: MP4, MKV, AVI, WebM, MOV
MP4、MKV、AVI、WebM、MOV
Audio: MP3, AAC, WAV, FLAC, OGG, Opus, M4A
MP3、AAC、WAV、FLAC、OGG、Opus、M4A
Quality: 64 to 320 kbps
64、128、192、256、320 kbps
MP3 to MP4 export supported
裁剪、淡入淡出、MP3转MP4
Why Choose Our Free MP3 Converter?
100% Private
Files are converted in your browser. Never uploaded to any server. Your privacy is guaranteed.
Completely Free
No ads, no watermarks, no registration. Free mp3 converter download — no hidden costs.
Open Source
Like Audacity, we believe in open tools. All code on GitHub, auditable and forkable.
Lightning Fast
Powered by FFmpeg.wasm. Convert video to MP3 in seconds. No upload required.
How It Works
1. Upload Your File
Drag & drop or click to select. Supports all major formats.
2. Choose Settings
Select MP3 quality (64-320 kbps), trim, or adjust volume.
3. Download
Get your MP3 instantly. Batch conversion supported.
Why Choose Our Free MP3 Converter Over Others
| Feature | CONVERTER TO MP3 | Other Online Converters |
|---|---|---|
| File Upload | 100% Local — No Upload | Server Upload Required |
| Ads | Zero Ads, Zero Pop-ups | Pop-ups & Banners |
| Registration | Not Required — Instant Use | Must Sign Up |
| Privacy | 100% Private — Files Never Leave Browser | Files Stored on Servers |
| Cost | 100% Free Forever | Limited Free Tier |
MP3 Converter Blog
View all →Apr 15, 2026
Best Free MP3 Converter 2026: No Upload, No Registration
Discover the best free MP3 converter that works entirely in your browser. Compare top tools and learn why browser-based converter to mp3 is the future of audio conversion.
Apr 12, 2026
How to Convert Video to MP3 on Any Device: Complete Guide
Step-by-step guide to extract audio from video files. Learn how to use a free video to mp3 converter on Windows, Mac, Linux, Android, and iOS without installing software.
Apr 10, 2026
MP3 vs AAC: Complete Comparison of Audio Formats
Compare MP3 and AAC formats in depth. Learn quality differences, compatibility, and when to use each format. Includes expert guidance on bitrate selection.