Image Resizer
Resize any image to exact pixel dimensions. Aspect ratio lock included.
Drop an image here, or click to browse
JPG, PNG, WebP · Ctrl+V to paste
🔒 Your images never leave your device — all processing happens in your browser.
Resize any image to exact pixel dimensions. Aspect ratio lock included.
Drop an image here, or click to browse
JPG, PNG, WebP · Ctrl+V to paste
🔒 Your images never leave your device — all processing happens in your browser.
This free image resizer lets you set exact pixel dimensions for any JPG, PNG, or WebP image without installing software. Enter the target width or height, toggle the aspect ratio lock to scale proportionally, and click Resize. A before-and-after preview shows the original and new dimensions side by side so you can confirm the result before downloading. All processing happens in the browser using the Canvas API — your image stays private.
Upload your image and enter the target width or height in pixels. With the aspect ratio lock enabled, changing one dimension automatically updates the other to keep the original proportions. Unlock it to enter custom dimensions independently. Click Resize and the Canvas API redraws the image at the new size. The result downloads in the same format as the original.
Many platforms enforce strict dimension limits — profile photo forms that require 400×400 px, print services that need 3000×2000 px at a fixed ratio, or e-commerce sites with specific product photo dimensions. This tool lets you hit those exact targets in seconds.
Serving a 300 px thumbnail from a 6000 px original wastes bandwidth and slows page loads. Scaling the image down to its display size before uploading reduces file size significantly — often more than compression alone.
Large camera images (12–24 MP) are rarely needed in emails or Word documents. Resizing to 1200–1600 px wide before inserting makes files manageable without any visible quality difference on screen.
Yes. Enable the aspect ratio lock and changing one dimension will automatically update the other to keep the original proportions. This prevents stretching or squashing.
Yes — resizing to smaller dimensions generally reduces file size because there are fewer pixels to store. For maximum compression, use the Image Compressor after resizing.
You can resize JPG, PNG, and WebP images. The resized file is saved in the same format as the original. To change the format at the same time, use the Format Converter tool first.
No hard limit is enforced. Resizing uses the browser's Canvas API, so extremely large target dimensions (above ~16,000 × 16,000 px) may be constrained by your device memory. For typical use cases any resolution works fine.
Unlock the aspect ratio lock, then enter the target width and height manually. For 16:9 at 1920 px wide, enter 1920 for width and 1080 for height.
Scaling down has minimal visible impact. Scaling up (enlarging beyond the original) will produce a softer or pixelated image — there is no extra detail to add, and this is unavoidable with any resize tool.