Shrink a video until it fits WhatsApp or email, or pull the audio out as MP3 — with real FFmpeg running inside your browser. Nothing gets uploaded anywhere.
MP4 · MOV · WebM · first use loads the engine (~32 MB, then cached)
Browser memory sets the practical ceiling — files up to a few hundred MB work well. For bigger jobs (or automated pipelines that compress every upload on your site), that's custom work: ask Glen.