Change Video Aspect Ratio
Convert landscape videos to 9:16 vertical for Shorts & Reels, 1:1 square, or 16:9. Zero uploads.
Drag & Drop a video here
or click to browse (MP4, WebM, MOV)
Transform landscape footage into vertical short-form content
The rise of TikTok, Instagram Reels, and YouTube Shorts has made vertical 9:16 the dominant mobile video format. Repurposing horizontal 16:9 YouTube videos or landscape camera footage traditionally required manual keyframing and masking in Premiere or Final Cut Pro.
Our in-browser Aspect Ratio Changer offers one-click automated formatting: the popular Blurred Backdropmode places your original video centered at full width while generating an eye-pleasing, softly blurred version in the background to fill the vertical display without awkward black bars. Everything renders locally on your GPU with zero uploads.
Frequently asked questions
How do I convert horizontal videos to vertical 9:16?
Select the 9:16 preset and choose Blurred Backdrop mode to fill vertical screens naturally without black bars.
What is the difference between Fit, Crop, and Blurred Background?
Fit adds letterbox padding; Crop fills the frame by trimming edges; Blurred Background fills bars with an aesthetic zoom blur.
Is the original audio preserved?
Yes. The original audio track is captured and remuxed synchronously into the exported video file.
Are my videos uploaded to a server?
No. Aspect ratio conversion runs entirely on your browser's hardware canvas. Zero bytes are uploaded.