Complete guide to resizing images by pixels, percentage, or preset sizes.
The Image Resize tool lets you change image dimensions quickly and accurately, all in your browser.
## Resize Methods
### By Pixels
Enter exact pixel dimensions for width and height. Lock the aspect ratio to avoid distortion.
### By Percentage
Scale the image relative to its current size. Enter 50% to halve the dimensions, 200% to double.
### By Preset
Choose from common presets: 1080p (1920×1080), 720p (1280×720), thumbnail (320×240), social media sizes, and more.
## Maintaining Aspect Ratio
Always enable "Lock aspect ratio" unless you specifically want to stretch the image. This ensures the width/height proportions stay correct.
## Output Formats
Save the resized image as:
- **PNG** — Best for graphics with transparency
- **JPG** — Best for photos (smaller file size)
- **WebP** — Best for web (smallest file size)
## Batch Resizing
Upload multiple images to resize them all to the same dimensions in one click.
## Tips
- For web images, resize to the actual display size to save bandwidth
- For printing, use at least 300 DPI (pixels per inch)
- Use WebP for the best web performance
