How to upscale videos — 4 easy methods to upscale 720p to 4k
Originally Answered: How can I convert 720p to 1080p? run Free Resize Video, click upper left red plus button to add your 720p videos into the program. then set “New Width =1920” and “New Height =1080 ” in the table. at last, click upper left RENDER button, the program will convert all 720p videos to 1080p.