Frequently asked questions
Are my videos uploaded anywhere?
No. The trimming, cutting and cropping all happen inside your browser on your device, and the video is never sent to a server.
Is there a size limit?
Yes, the limit is 1 GB per video and one video at a time. Everything runs on your device, so large or long videos use a lot of memory; files near that size are the most likely to slow down or crash the tab, especially on the compatible engine or on phones.
What are the two engines?
Quick mode edits with your browser's built-in recorder, needs no download, and works almost everywhere; it runs in real time, roughly as long as the kept part plays. ffmpeg mode downloads a built-in engine (about 31 MB) the first time and gives finer quality control. You can pick either one above; if one cannot run, switch to the other.
How do trim, cut and crop work together?
Trim and cut keep only the part between your start and end times. Crop keeps only the rectangle you draw on the video. You can use both together or just one of them, and the result is exported as a new video.
Will the quality change?
Editing re-encodes the video, so there is a small quality cost, set by the quality option. Cropping changes the picture on purpose by keeping only the area you select; trimming on its own mostly just shortens the clip.
Which formats can I use?
It reads most common video files and outputs either MP4 (H.264), which plays almost everywhere, or WebM (VP9). If your browser cannot make the format you picked, the tool switches to the one it can.