# Resize an image

> Resize to exact pixels, a percentage, or a ready-made size for Instagram, YouTube or a passport photo, and keep it under a file-size limit.

Open the tool: https://yourbrowsercandoit.com/resize-image

Resize to exact pixels, a percentage, or a preset size. Free, no signup. Runs entirely in your browser; files are never uploaded.

## How it works

Type new pixel dimensions or click a percentage chip. The aspect ratio is locked by default (typing a new width auto-updates the height), tap the lock icon to unlock and stretch freely. Choose the output format (JPEG, WebP, PNG) and quality for the lossy formats. The result block shows the new dimensions, file size, and saving percentage, with a green / amber indicator for whether the resize made the file smaller (almost always) or larger (rare). For upscaling, the maximum is 4x the original. Browser canvas resampling is used (bilinear). For very large reductions or scientific-grade resampling, the result is good but not lab-quality. Output filename has -resized appended with the new extension.

## How to use it

1. **Drop your image.** JPG, PNG, WebP or GIF; drag it in, choose it, or paste it.
2. **Pick the size.** Type pixels with the aspect ratio locked, drag a percentage, or choose a preset like Instagram post or passport photo.
3. **Choose format and limit.** Pick JPG, PNG or WebP, and optionally keep the file under 50 KB, 100 KB or any size a form asks for.
4. **Download.** The preview and file size update live; download when it looks right.

## Frequently asked questions

### How do I resize an image to specific dimensions?

Type the width or height in the input fields. If aspect ratio is locked, the other dimension updates automatically. Otherwise type both.

### Can I make an image bigger?

Yes, up to 4x the original. Upscaling beyond the native resolution introduces blur, that's a physics limit, not a tool limit.

### What's the right format for a resized image?

JPEG for photos, PNG to keep transparency, WebP for smaller files at similar quality in modern browsers.

### Is my image uploaded?

No. Resizing happens on a canvas in your browser.

## Related tools

- [Convert image](https://yourbrowsercandoit.com/convert-image): JPG, PNG, WebP, AVIF, any way.
- [PNG to JPG](https://yourbrowsercandoit.com/png-to-jpg): Convert PNG images to smaller JPG files.
- [JPG to PNG](https://yourbrowsercandoit.com/jpg-to-png): Convert JPG photos to lossless PNG.
- [WebP to JPG](https://yourbrowsercandoit.com/webp-to-jpg): Convert WebP images to universal JPG.
- [WebP to PNG](https://yourbrowsercandoit.com/webp-to-png): Convert WebP images to lossless PNG.
- [PNG to WebP](https://yourbrowsercandoit.com/png-to-webp): Shrink PNG images into modern WebP.