Resize images to custom dimensions with aspect ratio lock
Upload Image
or drag and drop here
Max file size: 10MB (10.00 MB)
Apply CSS filters like brightness, contrast, grayscale, and more
Convert images between PNG, JPEG, and WebP formats
Crop images with an interactive drag interface
Add text watermark to images with customizable position, font, and opacity
Image Resizer is a free online tool that lets you resize any image to custom dimensions directly in your browser. Whether you need to resize photos for social media, create thumbnails for your website, or adjust image dimensions for email attachments, this tool handles it all without uploading your files to any server. The tool supports all common image formats including JPEG, PNG, WebP, and GIF. You can resize by entering exact pixel dimensions or use the aspect ratio lock to scale proportionally. The aspect ratio lock ensures your images are never distorted — when you change the width, the height automatically adjusts to maintain the original proportions, and vice versa. All image processing happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device, ensuring complete privacy. The resized image can be downloaded instantly as a PNG file. The tool also shows you the original and resized file sizes so you can see exactly how much space you're saving.