Supported URLs include standard watch pages (youtube.com/watch?v=…), short links (youtu.be/…), Shorts (youtube.com/shorts/…), and embed URLs. Playlist links, private videos, and live streams are not supported — paste the URL of a single public watch page.
Choose MP4 when you want to watch the video offline, send it to someone, or edit it in a video editor. Most phones, tablets, and computers play MP4 without any extra software. Choose MP3 when you only care about the audio — a talk, a podcast upload, a music track — and need the widest device compatibility. Choose M4A for audio that will live in iTunes, Apple Music, or any modern streaming-aware library; M4A typically produces a cleaner sound at the same bitrate as MP3.
If you work with a lot of files in different formats, convrt's audio converter and video converter can re-encode any file you already have — they run entirely in the browser using WebAssembly, no upload required. For reducing file size without changing format, the compress hub handles images, audio, and video locally too.