Resizing changes how many pixels each frame has, and the aspect ratio changes its shape. Both matter: a smaller resolution shrinks files, and the right shape decides how a video looks on TikTok, Reels, Shorts or a widescreen player.
Choose a resolution preset, a platform resizer with the recommended sizes, or the aspect ratio converter, which fills the extra space with a blurred background instead of ugly black bars.
Choosing the right tool
- Horizontal video to vertical: use the Video Aspect Ratio Converter with a blurred background.
- Keep the aspect ratio when you only want a smaller file.
- Do not enlarge low-resolution videos: it adds pixels but no detail.
Questions
What is the difference between resizing and cropping?
Resizing scales the whole picture. Cropping cuts away part of it and keeps the rest at its original pixel size.
What size should I use for social media?
Vertical 1080×1920 (9:16) for TikTok, Reels, Stories and Shorts; 1080×1350 (4:5) for Instagram feed video; 1920×1080 for YouTube.
Other kinds of video tool
- Compress videoMake video files smaller for email, chat apps and uploads.
- Convert videoChange the format of a video: MP4, WebM, MOV and more.
- Edit videoTrim, crop, merge, split, rotate, change speed and more.
- Text, watermark and effectsAdd text, logos and subtitles, blur areas, change colours and filters.
- Create videoPhoto slideshows, audio to video, GIF to MP4 and recorders.
- Audio and soundExtract, remove, replace or change the sound of a video.
- GIFs and imagesTurn video into GIFs, frames and screenshots.
- Video info and checkersSee resolution, duration, codec, frame rate and more.
Or browse all video tools..