Resize Image Online Free — No Upload
Scale images to any width or height instantly. Lock the aspect ratio to avoid stretching — everything runs in your browser.
Drop images here or click to choose
Files are processed in your browser and never uploaded.
How to use
- Drop or select one or more images (JPG, PNG, WebP).
- Enter the target width in pixels — height updates automatically if aspect ratio is locked.
- Unlock the ratio to set a custom height, then click Resize and download.
About this tool
Resizing an image before compressing it is the most effective way to shrink file size — halving the dimensions reduces the pixel count (and file size) by up to 75%. This resizer scales images using the browser's Canvas API, so nothing leaves your device. You can resize by width, height, or both. The lock-aspect-ratio option prevents unwanted stretching. Output is saved as JPG for photos and PNG for PNG inputs. Pair it with the Image Compressor to hit a specific file-size target.
Frequently asked questions
How do I resize an image without distorting it?+
Enable the 'Lock aspect ratio' toggle. Enter only the width — the height is calculated automatically to keep the original proportions.
What is the best way to reduce image file size?+
First resize the image to the dimensions you actually need, then compress it. Reducing a 4000 px photo to 1200 px before compressing gives far smaller files than compression alone.
Does resizing reduce image quality?+
Downscaling (making the image smaller) looks excellent because the browser averages nearby pixels. Upscaling (making it larger) will look blurry because no new detail is added.
What output format will I get?+
PNG inputs are saved as PNG; all other formats (JPG, WebP, GIF, BMP) are saved as JPG at quality 90.
Can I resize multiple images at once?+
Yes — drop several files and they will all be resized to the same target dimensions. Download them individually or all at once.