Compress an MP4 online
Short answer
Drop your MP4 in, pick a quality preset, and download the smaller file. Free, no watermark — and unlike most online compressors, nothing is uploaded.
Drop a video here or choose a file
or drop your file here.
MP4 · MOV · MKV — compressed in your browser, never uploaded
Runs in your browser — your file is never uploaded.
Most 'online' MP4 compressors upload your file to a server, process it there, and hold it for some retention period you did not choose. That is a slow round trip and a privacy question attached to every holiday video and screen recording. This tool loads ffmpeg into the page instead, so the video stays on your machine.
The trade-off is honest: everything runs on a single thread, which is why there is a file-size cap and why a long clip takes a while to process. For phone footage, screen recordings, and clips you want to attach or upload somewhere, it is a good deal.
How to compress an MP4 online
- 1Drop in your MP4. Or click to pick it from your device.
- 2Choose a preset. High, Balanced, or Small, depending on how much you need to save.
- 3Download the result. Compare the before and after size, then save it.
Frequently asked questions
Is there a watermark?+
No. There is no watermark, no signup, no email wall, and no trial period.
How small can it get?+
Balanced typically lands at 25–40% of the original and Small at 10–20%. Footage that is already heavily compressed shrinks less, because most of the redundancy is gone.