MP3 remains the most universally playable audio format ever made: every phone, car stereo, browser, and hearing-aid app on earth can handle it. This tool converts almost any audio file — or the soundtrack of a video — into a standard MP3, entirely inside your browser.
Typical uses include converting a WAV recording into something small enough to send, turning a voice memo in M4A into a file an old car stereo accepts, or pulling the audio out of a lecture video for listening on the go. Encoding is done by LAME, the same encoder used by desktop audio tools, at a high-quality variable bitrate.
Your recordings never leave your machine. FFmpeg runs as WebAssembly inside the browser tab, so both the original and the converted MP3 exist only on your device.
Files are encoded with the LAME V2 variable-bitrate preset, which averages around 190 kbps — widely considered transparent for music and more than enough for speech.
Yes. Drop in any common video (MP4, MOV, WebM, MKV and more) and its audio track is extracted and converted automatically; the video stream is simply discarded.
No. The conversion is performed by a WebAssembly build of FFmpeg running inside your browser tab. The file never leaves your device, and closing the tab removes it from memory.