Video Compressor

Start with the Balanced preset, which scales the video to 75 percent at 30 fps. Ultra Compress drops to 50 percent size and 24 fps for the smallest file, and High Quality keeps full size at 30 fps. Check the estimated size and savings first, since lower resolution and frame rate shrink files the most.

In browsers with WebCodecs support, such as recent Chrome, Edge, and Safari, the compressor saves an MP4 with H.264 video. If your browser lacks it, the tool falls back to recording in real time, which saves an MP4 or a WebM depending on browser support. The download button picks the matching file extension.

The compressor processes the whole video, not just the start. Browsers with WebCodecs support use your device's video encoder and often finish in a fraction of the clip length. Other browsers fall back to a slower mode that runs at normal playback speed, so keep the tab open and in front.

Choose Ultra Compress and check the estimated size. Gmail caps attachments at 25 MB and WhatsApp limits videos sent as media to about 16 MB, so aim below those numbers. Trimming the clip before you upload helps most, because file size grows with length.

The tool plays your file in the browser, so it accepts anything your browser can play. MP4 and WebM work almost everywhere, and MOV works in Safari and often in Chrome. Rare formats such as AVI often fail to load. If a file will not open, convert it to MP4 first.

It is a prediction from the preset, resolution, and frame rate. The real file can come out larger or smaller depending on how much motion the video has. Screen recordings and still scenes shrink a lot, while fast action shrinks less, so compare the final size shown after the run.