Image Resizer — Free, Browser-Based
Resize a single image using quick percentage presets (25%, 50%, 75%, 150%, 200%) or exact pixel dimensions, with an aspect-ratio lock. Output is a PNG, generated entirely in your browser.
How to resize an image to specific dimensions
- Drop your image. Drag and drop a single image, or click to browse.
- Pick a percentage preset or type dimensions. Click 25%, 50%, 75%, 150%, or 200% for a quick scale, or type exact width/height in pixels.
- Lock or unlock aspect ratio. Keep the lock icon on to preserve proportions when you change width or height, or unlock it to stretch/squash freely.
- Resize and download. Click Resize Image, then Save to download the result as a PNG.
Use Cases
Frequently Asked Questions
Are my images uploaded?
No. Resizing runs in your browser via canvas. Your files never leave your device.
Does it preserve aspect ratio?
Yes by default. Disable the lock to stretch/squash to exact dimensions if needed.
What is the difference between resize and crop?
Resize scales the whole image. Crop cuts a rectangle out. Use the Image Cropper tool if you want to remove parts of the image.
Will image quality drop?
Downscaling looks smooth thanks to the browser's built-in image smoothing. Upscaling (150%/200%) causes blur — use dedicated AI upscaling software for large enlargements.
Can I resize multiple images at once?
No — this tool resizes one image at a time for precise control. For bulk format conversion, use the Image Converter tool.
What output format does it save as?
Resized images always download as PNG, regardless of the original format.
Related tools
More free, in-browser tools from the Image Tools set — every one runs locally, with no sign-up and no upload.