How do I resize video dimensions online?
Upload your video file, enter custom target width or height (or select a standard percentage preset), and click process to generate your resized video.
Resize Video
Change video dimensions for social platforms and websites.
Upload Video
Drop video hereChoose VideoUp to 100MB • MP4, MOV, WEBM, AVI
No signup•Secure processing•Auto-deleted after processing
How Video Resizing Works
- Custom Width & Height: Set custom target width or height in pixels to fit specific website or app container requirements.
- Aspect Ratio Lock: Keep aspect ratio enabled to prevent stretching, distortion, or unnatural letterboxing.
- Social Media Formatting: Resize video dimensions for Instagram, TikTok, YouTube Shorts, or web banner placements.
Frequently Asked Questions
Can I maintain the original aspect ratio while resizing?
Yes, preserving aspect ratio automatically calculates the corresponding width or height to prevent image stretching or distortion.
Does resizing video dimensions reduce file size?
Reducing width and height decreases frame area, which generally lowers file size when re-encoded at appropriate bitrates.
Which formats are supported for video resizing?
ConvertFast supports resizing common web formats including MP4, MOV, WEBM, AVI, and MKV.