Image Resizer
Resize images to exact dimensions in your browser. Lock aspect ratio, preview results, and download in PNG, JPEG, or WebP format.
Drop an image here or click to upload
PNG, JPEG, WebP, GIF, BMP
About Image Resizer
The Image Resizer tool lets you change the dimensions of any image directly in your browser. Upload a photo or graphic, set your target width and height, and download the resized version in seconds - no software installation or account required.
A drag-and-drop upload zone makes it easy to load your image. Once uploaded, the tool displays the original dimensions and provides editable width and height fields. An aspect ratio lock is enabled by default so your image scales proportionally - change one dimension and the other adjusts automatically. Toggle the lock off when you need non-proportional resizing for specific layout requirements.
The resized image appears in a live preview so you can verify the result before downloading. The tool supports all major web image formats including PNG, JPEG, and WebP. The canvas-based rendering engine handles images of any reasonable size efficiently.
Common use cases include preparing images for social media (which often require specific pixel dimensions), resizing product photos for an online store, fitting images into email templates, or creating thumbnails for a blog. Designers and developers frequently need to resize assets for different screen densities or breakpoints, and this tool provides a fast, private way to do it without opening a full image editor.
Because all processing happens client-side in your browser, your images are never uploaded to any server. This makes the tool suitable for sensitive or proprietary images where privacy matters. It also works offline once the page has loaded.
Frequently Asked Questions
What image formats can I resize?
This tool supports all common web image formats including PNG, JPEG, WebP, GIF, and BMP. Upload any of these formats, resize to your target dimensions, and download the result in the same format or choose a different output format.
Does resizing reduce image quality?
Resizing uses the browser's canvas API which applies bilinear interpolation by default. Enlarging an image beyond its original dimensions will introduce some softness. For best results, avoid upscaling more than 2x the original size. Downscaling generally preserves quality well.
Is my image uploaded to a server?
No. All processing happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device, making this tool completely private and usable offline.
Can I maintain the aspect ratio while resizing?
Yes. The aspect ratio lock is enabled by default. When locked, changing the width automatically adjusts the height proportionally and vice versa. Toggle the lock off to set width and height independently.