# Image resizer

URL: https://shahid09.is-a.dev/tools/image-resizer/
Author: Muhammad Shahid (https://shahid09.is-a.dev/)
Free tool · runs in your browser

Change an image's width and height in pixels or by percentage, keeping its proportions.

**Quick answer:** Choose an image, enter the width or height in pixels, and the other value follows if Keep proportions is on. Or press 25%, 50%, 75% or 200% for a quick change. Choose the format and press Resize. Making an image smaller keeps it sharp, while enlarging cannot add detail and may look soft. It all runs on your device.

## How to use it

1. **Choose an image.** The current size is shown.
2. **Set the new size.** Enter pixels, or press a percentage button.
3. **Resize and download.** Choose a format if needed and save it.

## Example

Reducing a large photo for a website, with proportions kept:

Input:

```
photo.jpg: 4000 × 3000
Width: 1200
```

Output:

```
photo-1200x900.jpg: 1200 × 900
```

## Common errors and how to fix them

- **The image looks stretched**: Turn on "Keep proportions" and enter only the width or the height.
- **The enlarged image is blurry**: Enlarging cannot add detail. Start from a larger original if you can.

## Frequently asked questions

### How do I resize without losing quality?

Scale down and keep the proportions. Shrinking looks sharp. Enlarging stretches the pixels and cannot add detail.

### What does "Keep proportions" do?

It keeps the width-to-height ratio, so the picture does not look stretched. Turn it off only when you need an exact size and accept some distortion.

### What is the difference between resizing and compressing?

Resizing changes the number of pixels. Compressing keeps them and reduces the file size. Doing both gives the smallest file.

### What size for Instagram or a website?

For Instagram, 1080 pixels wide is standard. For a website, a full-width image is typically 1600 to 2000 pixels wide, and a content image about 800 to 1200.

### What size should a passport photo be?

Rules vary by country and application, so check the official requirement for exact pixels and file size, then enter those here.

### Can I resize to a target file size?

Resizing changes the size indirectly. Use the [image compressor](https://shahid09.is-a.dev/tools/image-compressor/) afterwards to reach a limit such as 100 KB.

### Will it keep transparency?

Yes for PNG and WebP. JPG has no transparency, so a white background is added.

### Is my image uploaded?

No. It is resized in your browser and stays on your device.

### How do I resize without stretching to a new shape?

Crop to the shape first with the [image cropper](https://shahid09.is-a.dev/tools/image-cropper/), then resize. Changing the shape directly stretches the picture.

### How do I reach a small file size after resizing?

Run the result through the image compressor, and lower the quality until it fits your limit.

## Related

- [Image compressor](https://shahid09.is-a.dev/tools/image-compressor/)
- [Image cropper](https://shahid09.is-a.dev/tools/image-cropper/)
- [Image converter](https://shahid09.is-a.dev/tools/image-converter/)

## Sources

- [MDN: Image file type and format guide](https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/Image_types)
- [web.dev: Largest Contentful Paint](https://web.dev/articles/lcp)