Compress Video

A little, by design — that is how the file gets smaller. The "Best quality" preset keeps it close to the original; "Smaller file" trades more quality for a bigger size reduction. Pick the one that fits where you are sending it.

No server limit, because nothing is uploaded — the only ceiling is your device’s memory. Very large 4K clips can be slow or run out of memory in the tab; for those, resizing to a smaller resolution first helps.

It depends on the source and the setting: "smaller" trades visible quality for the biggest reduction, "balanced" aims for a marked size cut you would struggle to notice, and "best" keeps quality high for a gentler saving. A phone clip or screen recording often shrinks dramatically because it was inefficiently encoded to begin with. Start with "balanced"; drop to "smaller" only if you still need to fit a tight limit.

No — compression lowers the bitrate (how much data each second of video uses) while keeping the same dimensions, so a 1080p clip stays 1080p, just lighter. If the file is still too big after compressing, reducing the resolution as well is the next lever — the resize tool does that, and combining a smaller frame with compression gives the largest reduction.

A standard H.264 MP4 — the format that plays on virtually every device, player and upload form. So compressing also normalises the container and codec along the way: a clip that was awkward to share because it was both large and in an unusual format comes back smaller and universally playable. Everything runs in your browser, so the file is never uploaded.