Image Resizer

An image resizer is a tool that changes the dimensions (width and height) of an image while preserving visual quality as much as possible. Resizing images is one of the most common tasks in web development, graphic design, content creation, and everyday digital communication.

Our free online image resizer processes everything directly in your browser using the HTML5 Canvas API. No images are uploaded to any server — your files stay completely private. You can resize any image format supported by your browser (JPEG, PNG, WebP, GIF, BMP, and more) and export the result in PNG, JPEG, or WebP format.

The tool features aspect ratio locking to prevent distortion, adjustable output quality for JPEG and WebP formats, and instant file size feedback so you can balance quality against file size. Whether you're optimizing images for web performance, fitting photos to social media dimensions, or preparing assets for a design project, this tool gets the job done quickly.

All processing uses high-quality image smoothing via the Canvas 2D rendering context, ensuring resized images look crisp and clean even at significantly different dimensions from the original.

1. Upload an image — Click "Select Image" and choose any image file from your device.
2. Set dimensions — Enter the desired width and height in pixels. With "Maintain aspect ratio" checked, changing one dimension automatically adjusts the other.
3. Choose output format — Select PNG (lossless), JPEG, or WebP. For JPEG and WebP, adjust the quality percentage.
4. Resize — Click the "Resize Image" button to generate the resized image.
5. Download — Click "Download" to save the resized image to your device.