Free Online Audio Converter - No Upload Required
Convert between MP3, WAV, FLAC, OGG, OPUS, and AAC audio formats directly in your browser. Our privacy-first audio converter supports bidirectional conversions including FLAC to MP3, WAV to MP3, MP3 to FLAC, and many more. No files are ever uploaded to servers, ensuring 100% privacy.
Supported Audio Conversions
- FLAC to MP3, WAV, OGG, OPUS, AAC
- WAV to FLAC, MP3, OGG, OPUS, AAC
- MP3 to WAV, FLAC, OGG, OPUS, AAC
- OGG to MP3, WAV, FLAC, OPUS, AAC
- OPUS to WAV, FLAC, OGG, AAC, MP3
- AAC to WAV, FLAC, OGG, OPUS, MP3
Video Compression & Format Conversion
Compress MP4 videos with three quality presets or convert between WebM and MOV formats. All processing happens locally in your browser using FFmpeg WASM technology.
Why Choose 4to3 Media Converter?
- 100% Privacy: Files never leave your device
- Works Offline: No internet connection needed after first load
- No Signup: Start converting immediately
- Free Forever: No limitations, no watermarks
- Fast: Modern browser-based processing