Image Resizer
Resize any image to exact pixel dimensions or by percentage. Runs entirely in your browser — nothing is uploaded.
Drop image here or click to browse
PNG, JPG, WebP, GIF, BMP supported
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How to use this tool
- 1Drop your image into the box above or click to browse.
- 2Choose Pixels mode to set exact dimensions, or Percentage mode to scale up or down.
- 3Toggle aspect ratio lock to keep proportions, or uncheck to set width and height independently.
- 4Choose your output format and click Download.
Frequently Asked Questions
Scaling an image down generally has minimal visible quality impact, especially when saving as PNG or WebP. Scaling an image up (enlarging beyond its original size) will cause it to appear soft or pixelated, as the tool has to invent pixel data that was never there. For best results, always start with the largest available version of your image.
When aspect ratio lock is on, changing the width automatically adjusts the height to keep the same proportions, and vice versa. This prevents your image from appearing stretched or squashed. Uncheck it only if you intentionally want to change the shape of the image, for example to fit a specific template dimension.
No. Resizing happens entirely in your browser using the HTML5 Canvas API. Your image never leaves your device.
For photos, JPG gives a good balance of quality and file size. For images with transparency or sharp graphics, use PNG. For web use where you want the smallest file size, WebP is the best choice and is supported by all modern browsers.
Yes, but the result will be lower quality. Upscaling (enlarging) forces the browser to interpolate — essentially guess — what the new pixels should look like, which results in a soft or blurry image. For professional upscaling, dedicated AI upscaling tools will produce better results.