Paste a video, get a smaller MP4 you can actually send.
100% private. Compression runs entirely in your browser with ffmpeg.wasm — your video is never uploaded to any server.
Press Ctrl+V to paste your video
Copy a video file, then paste it anywhere on this page. Or drag & drop it here, or tap to pick a file. Pick several at once to queue them up. On iPhone: tap here and choose from Photos or Files.
File
Original size
Lower = sharper and bigger, higher = smaller and softer. CRF ignores the target size — the encoder picks whatever bitrate the picture needs.
Working in this tab — keep it open and your screen on until it finishes. Switching apps or locking the phone can stop the encode.
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original
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compressed
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saved
Output: MP4, WebM, or MOV. Very large files may struggle on phones (limits: 300 MB on iPhone, 500 MB on other phones, 1.5 GB on desktop) — the compression engine (~30 MB) downloads once, the first time you compress, from unpkg with a jsDelivr backup.