Trim, crop and compress video
Cut a clip down to the part you meant, in the tab, with nothing uploaded.
- Compress a videoDecide what the encoder is allowed to spend, and the size follows from it.
- Crop a videoCut the frame down to the shape the place you are posting to insists on.
- Remove the audio from a videoA clip with no audio track behaves differently from a clip that has been turned down.
- Resize a videoFewer pixels is the cheapest saving in video, and the only one that costs no quality per pixel.
- Trim a videoKeep the section you meant and drop the rest.
- Convert a videoAn extension names the box. What matters is usually the thing inside it.
About these tools
Video is the format people most want to keep to themselves and most often hand over anyway. A screen recording carries whatever was on the screen. A clip off a phone carries a room and the people in it. The ordinary way to shorten one is to upload several hundred megabytes to a service that will hold it for a day, which is a strange trade for an operation that amounts to copying a byte range.
These run on WebCodecs, the browser's own access to the same hardware decoders that play the file. That has one large consequence: cutting a clip does not have to decode it. Where the cut lands on a keyframe the compressed samples are copied straight through, so trimming a two-minute section out of an hour takes about as long as reading the file, and the picture is bit-identical to the source because nothing re-encoded it.
The honest boundary is memory rather than time. A tab has a working set, and on a phone it is around 250 MB. So each page here projects what the job will need from the file's own duration and resolution, and refuses at the start with that number rather than dying at sixty percent. A tool that fails halfway through has wasted more of your time than one that declined.