Convert MP4 to MP3
Free online MP4 to MP3 converter. Convert your MP4 files to MP3 format instantly with our privacy-first tool. No uploads, 100% secure.
Conversion Engine Ready to Start
Initialize the conversion engine to start converting your files. This process loads the necessary library for file conversion.
How to Convert MP4 to MP3
Quick Steps:
- Upload your video file using the dropzone above
- Adjust resolution, quality and compression if needed
- Click Convert File to start the conversion
- Download your converted MP3 file
Why Choose Our Converter:
- 100% client-side processing
- No file uploads to servers
- Fast and secure conversion
- Free with no registration required
- Works offline once loaded
Video Conversion Features:
Use Case: Great for video optimization, platform compatibility, or file size reduction
About MP4 Format
Industry standard for video sharing and streaming. Perfect balance of quality and compatibility. Our converter supports MP4 files and can convert them to various formats including MP3.
About MP3 Format
Universal audio format with excellent compatibility. Perfect for music, podcasts, and general audio. Converting to MP3 format gives you excellent results with most widely supported audio format. excellent for music and podcasts with adjustable quality..
Supported Formats
Convert between all major formats with our privacy-first converter
In Development
- Document conversions (PDF, DOCX, etc.)
- Archive conversions (ZIP, RAR, etc.)
- Additional image formats (TIFF, PSD, AI, RAW)
Supported Conversions
Explore all the input and output image formats supported by OfflineConvert.
Video Conversions
Convert between all major video formats including MP4, WebM, AVI, MOV, and more
All conversions are processed entirely in your browser for complete privacy.
Frequently Asked Questions
Yes, our converter is completely safe. All conversions happen locally in your browser, so your files never leave your device or get uploaded to any server.
No installation required. Our web-based converter works directly in your browser using WebAssembly technology for fast, efficient conversions.
MP3 supports resolutions up to 4K. You can maintain the original resolution or reduce it for smaller file sizes. Common choices are 1080p for high quality, 720p for balanced quality/size, or 480p for maximum compression.
Video conversion time depends on your device's processing power, video length, resolution, and quality settings. Short clips (under 1 minute) typically convert in seconds to minutes, while longer videos may take proportionally longer.
MP3 doesn't support audio, so only the video track will be converted. Any audio in your MP4 file will be removed.
MP3 format offers specific advantages: universal browser compatibility, efficient file sizes, optimized compression. This makes MP4 to MP3 conversion ideal for your specific use case.