Optimize an MP4 for web streaming
Most MP4s store the index (moov atom) at the end, so a browser must download the whole file before the first frame appears. Faststart rewrites the container with the index up front — no re-encoding, no quality loss, and playback begins immediately.
Drop your file here — or click to choose
MP4 / MOV file · up to 200MB each · processing starts instantly, preview is free
No signup needed. Only pay if you want the clean file.