Drag & drop image to resize
Resize dimensions visuallyPrivacy Secured: This utility runs 100% inside your browser. No files, logs, or values are uploaded to any server. Your information stays safe on your device.
About Image Resizer
The Image Resizer is a clean, client-side tool built to modify the width and height of images. Whether you need to scale down a massive 4K photograph to fit web layouts or resize an avatar to exact pixel dimensions, our resizer handles the task quickly. It includes an aspect ratio lock to prevent image stretching or distortion, ensuring your scaled images retain their original proportions.
How it Works
Upload your image. The current pixel width and height are detected and displayed. Type your new target width or height, or check the "Lock Aspect Ratio" box to let the tool calculate the corresponding dimension automatically. Click the "Resize" button, and our engine draws the image onto a canvas resized to those exact coordinates, generating a new preview and download link.
Key Features
- Dimension Customization: Input exact width and height in pixels.
- Aspect Ratio Lock: Automatically scales dimensions proportionally.
- Responsive Previews: Visualizes the resized output before downloading.
- Local and Secure: Processed client-side for maximum privacy.
Technical Details
The resizer uses HTML5 canvas rendering. After loading the image, the script adjusts the canvas element's width and height to match the user's inputs. The canvas 2D context draws the image stretching it to the new canvas boundaries: ctx.drawImage(img, 0, 0, width, height). The canvas is then exported as a download URL matching the original file type.