Drag & drop an MP4 file here or click to select
Only MP4 videos are supported
Converting MP4 video files to MP3 audio format has never been easier with our client-side conversion tool. Here's a step-by-step guide to extract audio from your video files:
Navigate to our MP4 to MP3 converter page. You'll see a clean, intuitive interface designed for maximum usability.
You have two options to upload your MP4 file:
Once your file is selected, the conversion process begins automatically. You'll see a progress bar showing the conversion status in real-time.
When conversion is complete, you'll get an audio player to preview your MP3. Click the download button to save the file to your device.
Client-side processing offers several significant advantages over traditional server-based conversion services:
Your files never leave your device. Unlike online converters that upload your videos to remote servers, our tool processes everything locally in your browser. This ensures complete privacy and security for your media files.
Server-based converters often impose upload limits or require premium accounts for large files. With client-side processing, you can convert files of any size, limited only by your device's capabilities.
By leveraging your device's processing power, conversions happen much faster than uploading large files to remote servers and waiting for processing.
Once the tool loads, you can use it without an internet connection for subsequent conversions, making it perfect for offline work.
Our MP4 to MP3 converter comes packed with features designed to make audio extraction as simple and efficient as possible:
Built on FFmpeg compiled to WebAssembly, ensuring high-quality audio extraction with industry-standard codecs.
Monitor conversion progress with a live progress bar and detailed logs showing exactly what's happening during processing.
Maintains the highest possible audio quality during extraction, supporting various bitrates and sample rates.
Works on any modern web browser, including Chrome, Firefox, Safari, and Edge, on desktop and mobile devices.
Everything runs in your browser - no need to download or install any additional software.
No, absolutely not. All processing happens locally in your browser using WebAssembly. Your files never leave your device, ensuring complete privacy and security.
Currently, we support MP4 video files as input. The output is always MP3 audio format, which is universally compatible with all media players.
There are no artificial file size limits. The only constraints are your device's available RAM and storage space.
Yes, completely free with no hidden costs, subscriptions, or premium features.
Yes, the tool works on modern mobile browsers, though very large files may be limited by device capabilities.
Check the logs section for detailed error messages. Common issues include corrupted input files or insufficient device resources.
The current version processes one file at a time. For batch conversions, you'll need to process files sequentially.
Since everything runs locally, your data security is entirely in your hands. No third-party access to your files.
This comprehensive MP4 to MP3 conversion tool represents the future of media processing - fast, private, and powerful, all running directly in your browser.