video tools
Convert Video Aspect Ratio Online
Adapt your video to any screen format. Convert landscape footage to 9:16 vertical for TikTok or 1:1 square for Instagram with padding or center crop options.
Processed 100% locally in your browser.
Drop your video file here, or browse
Supports MP4, WebM, MOV, MKV up to 500MB
Browse Video File
100% Client-Side Privacy • Zero Server Uploads
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How to Use Video Aspect Ratio Converter
1
Upload Video
Select your video file.
2
Choose Aspect Ratio
Pick 16:9, 9:16, 1:1, 4:5, or 4:3.
3
Select Fitting Mode
Choose Fit with Padding (Letterbox) or Fill & Crop (Center Crop).
4
Export Video
Download your reframed video.
About Video Aspect Ratio Converter
Computes geometric bounding rectangles to either scale-to-fit with letterbox margins or scale-to-fill with center cropping.
Supported Formats
MP4WebMMOV
Key Features
- Target ratios: 16:9 (Landscape), 9:16 (Vertical), 1:1 (Square), 4:5 (Portrait), 4:3 (Classic)
- Fit mode with clean background padding
- Crop mode with intelligent center framing
- Instant visual preview
Frequently Asked Questions
Instagram Reels and TikTok use a 9:16 vertical aspect ratio (1080x1920 pixels).
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