Click the 'Browse' button to choose the destination folder and click the 'RUN' button to start to compress video files without losing quality. Click the icon to edit the video where it is allowed to crop the black bars, remove commercials from video/movie, and freely set up the Start Time/End time to get favorite clips, in such a way the video file will be downsized with nary a quality loss (no video conversion involved).

Normally, the smaller video you want, the lower bit rate. You can adjust or lower the video resolution (such as downscale 4K to 1080P, 1080P to 720P), and lower the video/audio bit rate by 20-50% compared with its default one. Generally, frame rate and frame size don't much affect the file size. Click the icon to adjust the video parameters, like Resolution and Bit Rate to make your file smaller. Tips: You can adjust the slidebar of LQ-HQ or click 'Use High Quality Engine' in the advanced setting area to improve your compressed video quality.

These formats are specially set for uploading videos to websites barely with the smallest size yet the highest possible quality. To shrink video for YouTube, Facebook, Instagram, WhatsApp, Vimeo, and other websites, or reduce video for e-mail, go to the Web Video Profile column and select a streaming video format like FLV, 3GP, WMV, etc.

To compress a large video file to mobiles, here are 420+ readymade profiles for mobiles, which means you can compress video to iPhone iPad Android with small file size and high quality in one click.

To compress 4K or HD videos on Mac, choose HEVC which format provides a high compression rate.

Default mac file compression software