Resize images to exact dimensions, right in your browser
Need a 1200×630 social preview, a 512×512 avatar, or just a smaller copy of a photo? This tool resizes images to any pixel dimensions or percentage of the original, with an aspect ratio lock so nothing gets distorted.
The resized image is generated locally on your device — private, instant, and free. PNG files keep their transparency; other formats are saved as high-quality JPG.
How to resize an image
- Drop an image into the box above.
- Enter a width or height, or use the 25/50/75% shortcuts.
- Click “Resize image” and download the result.
Frequently asked questions
Is my image uploaded anywhere?
No. Resizing happens locally in your browser using the canvas API. Your image never leaves your device.
Will resizing reduce image quality?
Scaling down is safe and often improves sharpness at the display size. Scaling up beyond the original dimensions can't add detail, so enlarged images will look softer.
How do I keep the proportions right?
Leave “Lock aspect ratio” checked — changing the width automatically updates the height (and vice versa) so the image never looks stretched.