Image Resizer
Resize images to any dimension using Canvas API
How to Use
- Select an image
Choose an image file from the toolbar file input. The original image dimensions will be displayed.
- Set dimensions
Enter the target width and height. When aspect ratio lock is ON, changing one dimension auto-adjusts the other.
- Resize and save
Click "Convert" to preview the resized image, then use the download button to save it.
Image Resizer Examples
Resize to 512x512
1920x1080 image512x512 image (aspect ratio lock OFF)Useful for creating icons and thumbnails.
Resize maintaining aspect ratio
1920x1080 image, width set to 800800x450 imageEnable aspect ratio lock to auto-calculate the height.
Features
- Browser-based image resizing via Canvas API
- Aspect ratio lock toggle
- Output format selection (PNG/JPEG/WebP)
- Original vs output size comparison
- Live preview of resized image
- One-click download
- Images never leave your device
FAQ
What is the maximum resize dimension?
It depends on browser Canvas API limits. Most environments support 4096x4096 or larger, but very large sizes may cause memory issues.
Does resizing degrade image quality?
Upscaling may introduce some blurriness due to interpolation. Downscaling generally maintains good quality. For JPEG/WebP, you can adjust the quality setting.
Are images uploaded to a server?
No. All resizing is performed locally in your browser via Canvas API. Image data is never transmitted externally.