Resize an image
Change an image's pixel dimensions to what it actually needs to be. The single most effective thing you can do about page weight, and it costs nothing in visible quality.
or drop images here
How it works
- 1
Choose or drag in your images.
- 2
Enter the width and height you need.
- 3
Click Resize and download the result.
Why use this converter
- Exact dimensions
Type the pixel size rather than dragging until it looks about right.
- Ratio locked by default
Enter one dimension and the other follows, so nothing stretches.
- No upscaling
Enlarging cannot invent detail, so we return the original rather than a soft fake.
- Batch friendly
Resize a whole set to the same dimensions in one pass.
When to resize
Almost always because the image is bigger than the job needs:
- Images far larger than they display: The most common waste on any website.
- Preparing a consistent set: Product shots or team photos that should all match.
- Hitting a specified size: Platforms that state exact pixel dimensions.
- Getting under a file-size limit: Halving both dimensions leaves a quarter of the data.
How large should a web image actually be?
Roughly twice the width it displays at. A card image shown 400 pixels wide wants about 800 pixels of source, which covers high-density screens without carrying detail nobody can resolve.
Beyond that you are paying for pixels the browser discards on every single load. A 4000-pixel photo in a 400-pixel card is carrying a hundred times the data it needs, and no compression setting fixes that — only resizing does.
Why stretching is so obvious
Aspect ratio is the relationship between width and height. Change one without the other and faces widen, circles turn oval, and viewers notice immediately even if they cannot articulate what is wrong.
With the ratio locked, entering one dimension derives the other. If you need to fill a box whose proportions differ from your image, resize to fit inside it and crop the remainder — never stretch to fill.
Frequently asked questions
Will resizing reduce the file size?
Substantially. Halving both dimensions leaves a quarter of the pixels, which is a far bigger saving than compression alone can achieve.
Can I enlarge an image?
Not usefully. Enlarging cannot recover detail that was never captured, so the result is soft. We return the original rather than produce a blurry upscale.
Should I resize or compress?
Resize when the image is physically bigger than it displays; compress when you need to hit a file-size limit. For oversized photos, do both — resize first.
What formats can I resize?
JPG, PNG, WebP, GIF and BMP.