Resize images online for free. Set custom width, height, or percentage while maintaining aspect ratio. Preview original vs resized and download instantly. All processing in your browser.
NuToolz Image Resizer is a free, browser-based tool that lets you resize images to any custom dimension. Set width, height, or scale by percentage while maintaining the aspect ratio. Preview the result before downloading. All processing happens locally in your browser — your images are never uploaded to any server.
Drag and drop or click to select the image you want to resize.
Enter the desired width, height, or percentage. Toggle aspect ratio lock as needed.
Preview the result and click download to save the resized image.
Enlarging images can reduce quality, but reducing size generally preserves quality. The tool uses high-quality canvas rendering for the best results.
Yes, the aspect ratio lock is enabled by default. When you change width, the height adjusts automatically and vice versa.
You can upload JPEG, PNG, WebP, and GIF images. Resized images are downloaded as PNG.
Yes, the Image Resizer is 100% free with no limits on the number of images you can resize. There are no hidden fees or watermarks.
Yes. All resizing happens entirely in your browser. Your images are never uploaded to any server, ensuring complete privacy.
Yes, the tool is fully responsive and works on smartphones and tablets. Upload images from your camera roll and resize them directly in your mobile browser.
Drag and drop an image here, or click to browse
Supports JPEG, PNG, WebP, GIF