Is this MP4 to MP3 converter really free?
Yes — completely free. No signup, no account, no payment, no hidden costs. yhile.com is free forever. There are no ads either.
Does my video file get uploaded to a server?
No. Your file never leaves your device. The conversion happens entirely inside your browser using WebAssembly (ffmpeg.wasm). We cannot see your files and we don't store anything.
What is MP3 and why would I extract it from an MP4?
MP3 is a widely-supported audio format. MP4 files contain both video and audio tracks. Extracting the audio as an MP3 lets you save music, podcasts, interviews, or any sound from a video — at a much smaller file size, without the video.
How large a file can I convert?
The limit depends on your device's available RAM. Most modern computers handle files up to 1–2 GB fine. Very large files may be slow on low-memory devices.
Does this work on iPhone and Android?
Yes. The tool works in any modern browser — Chrome, Safari, Firefox, Edge — on desktop, iPhone, iPad, and Android devices.
What audio quality does the MP3 have?
The tool uses a high-quality VBR setting (equivalent to about 190 kbps). The output quality is limited by the audio quality in the original MP4 file.