Server-Assisted processing
Your file is uploaded to the chisheu tools server, compressed with native FFmpeg, then offered for download. Files are not stored permanently — job inputs/outputs auto-delete within about 1 hour. Do not upload confidential media you cannot send to this public tool.
Prefer fully offline processing?
No upload — slower FFmpeg.wasm in your browser. Best for confidential clips you will not send to this server.
Ultra Video Compressor
v2.0.8Compress MP4, MOV, or MPEG (.mpg/.mpeg) to WebM, MP4, WebP, or GIF on the chisheu tools server. Soft ceiling 4 GB; files over 200 MB are allowed with a warning.
Click or drag MP4, MOV, or MPEG (.mpg/.mpeg) here (soft max 4 GB)
Large file (> 200 MB)
Upload and encode will take longer. Keep this tab open and your connection stable until the job finishes. Soft server limit is 4 GB — bigger files will be rejected at the gate.
Timeline Editor
Drag handles to set in/out points. Defaults = full clip. Multi-clip splice is on the Legacy WASM page.
Relative to how the clip plays on your phone. Preview above shows the result; scale % applies after rotating.
Size preview
—
Server will report exact output size when done.