---
title: "Image Resizer — Resize Photos by Pixels or Percent | fbuff"
description: "Resize images to exact pixels or a percentage, lock the aspect ratio, pick aspect-ratio presets and preview before you download. Free, no upload needed."
url: https://fbuff.com/tools/image-resizer/
---

![A large photo frame shrinking into a smaller frame, with corner handles and a lock icon](https://fbuff.com/content/image-resizer.webp)

## How to use

1. Drop a JPG, PNG or WebP image on the box, click it to browse, or paste with Ctrl+V.
2. In Resize mode, choose Pixels to type an exact Width and Height, or Percent to scale it, for example 50%. Keep Lock aspect ratio on so the photo is not stretched.
3. To change the shape, pick a Ratio presets value (1:1, 16:9, 4:3, 3:2, 9:16 or 21:9), or switch to Crop mode and drag the frame over the part you want to keep.
4. Check the Preview and Output Size, then click Resize & Download (or Crop & Download).

## How to resize an image

Most of the time you want a smaller copy of a photo: to email it, upload it to a form with a size limit, or put it on a website. Type the new width with Lock aspect ratio on, and the height follows. A phone photo of 4032 × 3024 pixels resized to 1200 pixels wide becomes 1200 × 900, which is plenty for a web page or an email and a fraction of the file size.

Making an image larger than the original does not add detail: it only stretches the pixels, so it looks softer. Start from the biggest original you have.

## Common sizes

Use these as a starting point and check each site's current guidance:

| Use | Ratio | Typical size (pixels) |
| --- | --- | --- |
| Profile picture | 1:1 | 400 × 400 or larger |
| Square social post | 1:1 | 1080 × 1080 |
| Story or reel (vertical) | 9:16 | 1080 × 1920 |
| YouTube thumbnail, widescreen slide | 16:9 | 1280 × 720 or 1920 × 1080 |
| Website photo or blog image | 3:2 or 4:3 | 1200 to 1600 wide |
| 4×6 inch print | 3:2 | 1800 × 1200 (at 300 dpi) |

## Resize or crop?

Resizing changes the size of the whole picture and keeps everything in it. Cropping cuts away the edges to change the shape, for example to make a landscape photo square for a profile picture. Choose a ratio preset, crop to that shape, then resize the result to the exact pixel size you need.

The download keeps the original format: a JPG stays a JPG and a PNG stays a PNG. The new image is drawn fresh, so camera details such as GPS location are not copied into it.

## Frequently asked questions

### How do I resize a photo without losing quality?

Make it smaller, not larger, and keep Lock aspect ratio on. Downsizing a photo keeps it sharp at the new size; enlarging always looks softer.

### How do I make a picture smaller in KB or MB?

Reducing the pixel size is the most effective step: halving the width and height cuts the pixel count to a quarter. For an exact file size limit, also try the Image Compressor.

### Can I resize several images at once?

Not here; this tool works on one image at a time.

### Are my photos uploaded?

No. Resizing and cropping happen in your browser, and your photos never leave your device.

Found a problem or have an idea? [Report a problem](https://fbuff.com/contact/?tool=image-resizer)

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