Image Resizer is a free tool that changes the dimensions of JPG, PNG and WebP images. Resize by percentage, fit images inside a maximum size, or set exact pixel dimensions, for one image or a whole batch. It runs in your browser, and your images are never uploaded.
How to resize images
- Choose a mode: By percentage, Fit inside a size or Exact size.
- Enter the percentage, or the width and height in pixels.
- Add your images. Each is resized immediately, and you can change the settings to redo them all.
- Download the resized images one by one or as a ZIP.
Which mode to use
- Fit inside a size is the safest for mixed photos: a 1920 × 1920 box turns landscape photos into 1920 px wide and portrait photos into 1920 px tall, without distortion. Images already smaller are left alone.
- By percentage is handy for halving everything (50%) or making quick thumbnails (10–25%).
- Exact size is for strict requirements, such as a 1080 × 1080 post or a 400 × 400 profile picture. If the shape differs, the image is stretched, so crop it to the right shape first.
Common sizes
- Full HD screen or website hero image: 1920 × 1080
- Square social media post: 1080 × 1080
- Story or reel: 1080 × 1920
- Email attachment that looks fine on any screen: 1600 px on the longest side
Enlarging a logo or icon? Start from its SVG version if you have one: SVG to PNG renders it sharply at any size. Resizing keeps each image’s format. For smaller files, follow up with the Image Compressor.
Frequently asked questions
What is the difference between the three modes?
“By percentage” scales every image by the same amount. “Fit inside a size” shrinks each image until it fits in a box, keeping its shape. “Exact size” forces every image to precisely the size you type, which can stretch it.
Can I make an image bigger?
Yes, with a percentage above 100% or a larger exact size, but enlarging cannot add detail, so the result will look softer.
Does resizing keep the file format?
Yes. JPG stays JPG, PNG stays PNG and WebP stays WebP. Other formats such as GIF are saved as PNG.
Will resizing reduce the file size?
Making an image smaller almost always reduces its file size a lot, because there are fewer pixels to store. For even smaller files, use the Image Compressor too.
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