Image Resizer
Resize to exact dimensions or a preset for any platform.
Runs in your browser, nothing is uploadedFree, no signupNo watermarkPNG, JPEG, WebP
Drop an image here
or click to choose one. It never leaves your device.
Three steps
How to use the image resizer
- 01
Add an image
Drop in a PNG, JPEG or WebP and the current pixel dimensions appear straight away.
- 02
Set width, height or percent
Type an exact pixel size, scale by percentage, or pick a preset for a platform that has a fixed requirement.
- 03
Download the resized file
The aspect ratio stays locked unless you unlock it, so nothing comes out stretched by accident.
Why this one
What makes it different
The ratio is locked by default
The most common resizing mistake is a squashed image, so the link between width and height is on until you deliberately break it.
Down-scaling that stays sharp
Large reductions are done in steps rather than one jump, which is what keeps fine detail from turning to mush at small sizes.
Presets for the sizes that are fixed
Some dimensions are not a preference, they are a requirement. The presets carry the ones that get rejected if they are wrong.
How this tool handles your files
- Where it runs
- Your browser, not a server
- Uploads
- None, ever
- Account
- Not required
- Watermark
- Never added
The short version
About image resizer
Resizing is the least glamorous image operation and the one people get wrong most often, usually by typing both a width and a height and wondering why everyone looks slightly wide. It matters more than it seems: serving a four thousand pixel photograph into a space eight hundred pixels wide wastes most of the bytes on the page, and no amount of compression recovers what resizing would have solved outright.
Questions
Image Resizer FAQ
Will resizing make my image blurry?
Making an image smaller keeps it sharp. Making it larger cannot invent detail that was never captured, so an image enlarged well beyond its original size will always look soft, whatever tool does it.
How do I resize without stretching?
Leave the aspect ratio locked and set only one dimension. The other is calculated for you. Setting both by hand is what produces a stretched result.
What size should a web image be?
Match the largest size it will actually display at, then double it for high-density screens. A banner shown at 800px wide wants roughly a 1600px file, not the 4000px original.
Does resizing reduce the file size too?
Yes, and usually far more than compression does. Halving both dimensions removes three quarters of the pixels, so it is the first thing to try when a file is too heavy.
Free, and staying free
The tools are free because the icons are the business.
Thridy is a library of thousands of 3D icons in one consistent style, free for commercial use with no attribution and no account. The tools exist so you never have to upload an image to somebody else's server to resize it.
Keep going
More image tools
Image Cropper
Crop freehand or lock to a ratio like 1:1 and 16:9.
Circle Crop
Cut an image into a perfect circle with transparent corners.
Rotate Image
Turn an image by 90 degrees or any custom angle.
Flip Image
Mirror an image horizontally or vertically.
Add Border
Frame an image with a solid border in any colour.
Rounded Corners
Soften an image with rounded corners.