Compress MP4 Files
MP4 is the most common video format, and most MP4s are larger than they need to be. This tool re-encodes your MP4 to a smaller MP4 locally in your browser — no upload, no watermark.
Drag & drop a video here, or
Processed 100% in your browser — your file never leaves your device.
MB
About compressing MP4 files
MP4 is a container; the size comes from the video bitrate inside it. Re-encoding the H.264/H.265 stream at a lower bitrate is what actually shrinks the file, and the result stays a universally-compatible MP4.
Frequently asked questions
- Will the output still be an MP4?
- Yes. The tool outputs a standard H.264 MP4 that plays everywhere — phones, browsers, editors and social platforms.