About Crop Video Online Free — Change Aspect Ratio to 16:9, 9:16, 1:1
Repurpose horizontal YouTube videos into vertical TikTok, Instagram Reels, and YouTube Shorts clips by cropping and focusing on the core subject.
Key Features & Capabilities
- Crop video to standard aspect ratios (9:16, 1:1, 16:9, 4:5)
- Visual draggable crop bounding box with live preview
- Centering and position adjustment controls
- 100% in-browser FFmpeg WebAssembly rendering
- Export high-definition MP4 videos without watermarks
How to Crop Video Aspect Ratio Online
Step 1: Upload Video
Select the video you want to re-frame.
Step 2: Position Crop Frame
Choose an aspect ratio (e.g. 9:16 for Reels) and center on the subject.
Step 3: Export Cropped Video
Render and download your newly framed video.
Frequently Asked Questions
Can I turn horizontal videos into vertical TikToks?
Yes! Select the 9:16 portrait aspect ratio to crop horizontal 16:9 videos into vertical formats.
Is my video uploaded to a cloud server?
No, cropping runs locally in your browser memory.
Related Utility Tools
Why Zaeyon?
Private, free, and browser-based — no account, no uploads, no compromises.
Zero Uploads
Your files never leave your device. All processing happens locally in your browser memory — nothing is sent to any server.
100% Free Forever
No subscriptions, no hidden fees, no daily limits. Every tool on Zaeyon is permanently free to use without an account.
Instant & Powerful
Powered by WebAssembly — the same low-level technology used in native apps — so processing is fast even for large files.
Works Offline
Once the page loads, the WebAssembly engine runs entirely on your device. No internet connection needed to process files.
Works Everywhere
No software installation required. Runs directly in your browser on Windows, Mac, Linux, iOS, and Android.