BrowserToolbox

Images

Free Online Image Resizer

Change the width and height of a JPG, PNG, or WebP image.

Supports JPG, PNG, WebP.

Processed on your device

Private by design. Your files are processed directly in your browser and are never uploaded to our servers.

What this tool does

Image Resizer changes the pixel dimensions of a JPG, PNG, or WebP image and lets you download a new copy. It is useful for profile photos, email attachments, and images that need a specific width.

How to resize an image

  1. Drop an image onto the page or choose one from your device.
  2. Check the original dimensions and file size.
  3. Set a width, height, or percentage. Leave aspect ratio locked unless you want to stretch the image.
  4. Choose JPG, PNG, or WebP, then click Resize image and download the result.

Supported formats

  • Input: JPG, PNG, and WebP.
  • Output: JPG, PNG, and WebP.
  • GIF, HEIC, AVIF, and SVG are not accepted.

Limitations

Enlarging a small image cannot invent detail. JPG export cannot keep transparency. Color-profile handling depends on your browser. The original file is not overwritten. If you need a smaller file at the same dimensions, use the Image Compressor. To change only the format, use the Image Converter.

Privacy

The selected file is read by JavaScript running in this tab. It is not posted to BrowserToolbox, an advertising network, or a conversion API. Closing the tab discards the in-memory copy. The downloaded file is saved by your browser like any other download.

Frequently asked questions

Does resizing upload my image?

No. The image is decoded and redrawn with the browser canvas on your device. BrowserToolbox has no file-upload endpoint.

Will the aspect ratio stay the same?

Yes, unless you turn off “Preserve aspect ratio.” Editing the width then updates the height, and editing the height updates the width. Percent mode scales both sides together.

Which formats can I download?

You can export JPG, PNG, or WebP. PNG is lossless. JPG and WebP use the quality slider. JPG replaces transparent pixels with the background color you choose.

Why is there a size limit?

Very large pixel dimensions can run out of memory and crash a tab. Each side is limited to 8,192 pixels, and the total is limited to 16 megapixels. Files over 40 MB are rejected.

Does this change the original file?

No. Download saves a new file. The original stays where it was.