Video to MP3

A little, unavoidably. The audio inside a video is already compressed, and MP3 compresses it again, so this is a second generation. It is inaudible for speech and fine for casual listening. If the recording matters — you are going to edit it, or publish it — choose High, which uses roughly twice the bitrate and keeps the loss well below what most people can hear.

Files up to 500 MB work. Because only the audio is decoded and re-encoded, extraction is far quicker than a video conversion of the same file — a one-hour recording typically finishes in well under a minute on a normal laptop.

The tool checks before it starts and tells you rather than handing back an empty file. Some screen recordings and phone videos are genuinely silent, and a few files carry an audio track that your browser cannot decode; in that case Chrome supports the widest range and is worth trying.

With LAME, the reference MP3 encoder, running inside the page. Browsers can play MP3 but none of them can create one — their built-in encoders handle AAC and Opus only — so the encoder is downloaded as part of this tool the first time you use it. That is why the file you get is a real MP3 that plays on anything, rather than something renamed to end in .mp3.

No. The whole extraction happens inside your browser, and the file leaves memory as soon as you close or reload the page. Nothing is sent anywhere and nothing is stored.