Compress Video makes a clip small enough to send — under a messenger's or an email's attachment limit, inside a portal's upload cap, or simply lighter on a full phone. It re-encodes the video with H.264 at one of three quality levels and can lower the resolution at the same time; the result is an MP4.
Phone videos are recorded at a far higher bitrate than anyone needs for watching on a screen, which is why they usually shrink a lot. Everything runs in your browser with ffmpeg, so the video is never uploaded — but it is your device doing the encoding, and a long clip takes its time.
How to use
Add the video that is too large.
Choose a level: best quality, balanced or smallest file.
If the file must get much smaller, also pick a lower resolution — 720p is plenty for phone screens and messengers.
Run it, compare the new size, and download the MP4.
FAQ
How much smaller will my video get?
It depends on the source. A recent phone recording often drops to a fraction of its size on the balanced level, and further at 720p. A video that was already compressed for the web has little left to give and can come out barely smaller — or even larger on the best-quality level.
Can I set an exact target size, like 25 MB?
No. You choose a quality level and a resolution, not a number of megabytes. If the result is still too big, run it again on the smallest level or a lower resolution, or trim the clip first.
Can the resolution option make things worse?
It sets the frame height and keeps the proportions. Pick a value below your video's own height — choosing 1080p for a 720p clip enlarges it and makes the file bigger. On an upright phone video, 720p means a frame only about 400 pixels wide.
Is my video uploaded?
No. Compression runs entirely in your browser tab, so private recordings stay on your device, and no account is needed.