Video compressor
Compress MP4, MOV, MKV and WebM online — 100% free. Your video never leaves your device: everything runs in your browser.
Pick a video file to see its size and duration.
How to compress
Choose your video
Pick an MP4, MOV, MKV or WebM file — any size your device can hold.
Select a preset
High keeps more detail, Low gives the smallest file, Medium balances both.
Compress and download
Output is always MP4 (H.264) for maximum compatibility.
Frequently asked questions
Is my video uploaded anywhere?
No. Compression runs 100% in your browser with WebCodecs. Nothing leaves your device.
Can I compress 1GB or 2GB videos?
Yes — there is no server upload limit. Very large files need a modern phone or computer with enough memory.
Which browsers work?
Recent Chrome or Edge on desktop works best. Safari 16.4+ on Mac and iOS also works.