AI Resize Video is an online, AI-powered video editing toolkit designed for fast everyday processing. It combines video resizing, aspect-ratio changes, compression, and format conversion in one web app. Users can expand vertical or horizontal footage with generative AI, reduce file size for easier sharing, and convert common formats such as MP4, MOV, AVI, WEBM, and GIF. The workflow is simple: upload a file, select the desired output, process it in the browser, and download the result. It is optimized for social media, email, and web publishing, while keeping outputs watermark-free and easy to share.