Browser-based video editing usually means uploading footage to someone’s render farm; these tools work differently. Decoding, frame processing, and encoding all happen on your device with browser codecs and WebAssembly, which is what lets the background remover produce transparent WebM and the editor trim, grade, and overlay clips without your footage ever leaving your machine. Start in the timeline editor for creative work, or grab a single-purpose utility — compress, resize, rotate, convert, stabilize — when you just need one fix before publishing.