Image Resizer
Resize images by pixels or percentage with optional aspect-ratio lock.
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About this tool
Image Resizer changes an image's pixel dimensions — handy for profile pictures with strict size requirements, forum avatars, or shrinking a huge photo before emailing it. Enter exact pixel values or scale by percentage, and toggle the aspect-ratio lock to prevent stretching.
Resizing happens locally with the canvas API, so your originals never leave your device. Upscaling beyond the original size is allowed but will look soft, since no new detail can be invented.
How to use
- Upload an image.
- Choose pixels or percent mode and enter the new size.
- Keep aspect-ratio lock on to avoid distortion (recommended).
- Preview the new dimensions and download the resized image.
Frequently asked questions
It keeps width and height proportional. With it on, changing one dimension automatically adjusts the other so circles stay circular instead of becoming ovals.
Yes, but enlarging adds no real detail — the result will look blurry or pixelated compared to a true high-resolution original.
Usually yes: fewer pixels means less data. For maximum savings combine resizing with the Image Compressor.
No. Resizing is done entirely in your browser.