About the Aspect Ratio & Dimension Calculator
Resize, crop, and pad images to fit specific aspect ratios perfectly. Generate graphics tailored to Instagram, YouTube, X, and TikTok dimensions with automated background fills.
How to Use
- 1
Select a social platform preset (like Instagram Story) or enter custom width and height.
- 2
Upload your base image.
- 3
Select 'Center Crop' for flush cropping, or 'Padding Fit' to keep the full image with border fills.
- 4
Preview the canvas and download the resized PNG.
Key Features
- Dozens of social media aspect ratio presets built-in
- Padding fit backgrounds: Smart blur, custom solid colors, or gradients
- Aspect ratio string calculation (e.g. 16:9)
- High-resolution canvas generation
- Client-side image processing
Frequently Asked Questions
What is 'Padding Fit' mode?
Padding Fit scales your image so it fits completely inside the target box without cropping. It fills the remaining empty space with a blurred copy of the image or solid colors.
Can I crop raw photo files?
Yes. The tool handles major image files (JPEG, PNG, WebP) directly in browser memory.