FreeToolsWorld

Image Resizer

Resize an image to exact dimensions in your browser.

Image Tools Free, no sign-up Runs in your browser

Processed in your browser. Nothing is uploaded.

About the Image Resizer

Image Resizer changes the pixel dimensions of a picture. Give it a width, a height, or a percentage, and it redraws the image at that size and hands it back as a download. The original file is never modified and never uploaded.

Aspect ratio locking is on by default, because stretching a photograph is almost never what anyone wants. With it on, setting a width calculates the matching height for you. With it off you can set both independently, and the preview shows exactly how distorted the result will be.

Presets cover the sizes that come up repeatedly: common social post and profile dimensions, standard thumbnail sizes, and the 1200 by 630 that link previews expect. Resizing down always looks good; resizing up cannot invent detail that was never captured, so an enlarged image is softer and the tool says so.

How to use the Image Resizer

  1. Choose an imageSelect a file or drag it onto the drop area.
  2. Set the new sizePixels or a percentage, with the ratio locked by default.
  3. Check the previewOriginal and resized dimensions are shown together.
  4. DownloadThe resized image is saved straight to your device.

Features

  • Resize by pixel dimensions or by percentage
  • Aspect ratio locking, with an option to stretch
  • Presets for social, thumbnail and link preview sizes
  • High-quality downscaling
  • Choice of JPEG, PNG or WebP output
  • Shows original and new dimensions and file sizes
  • Runs entirely in your browser

Who uses this tool

The image resizer is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

  • Fitting a photo to a size limit on a form
  • Making thumbnails for a gallery
  • Preparing an image for a social post
  • Shrinking a phone photo before emailing it
  • Producing a link preview image at the right dimensions

Frequently asked questions

Does resizing lose quality?

Making an image smaller discards pixels, which is fine and usually looks better than letting a browser scale it on the page. Making it larger cannot add detail that was never there, so an enlarged image always looks softer.

What is aspect ratio locking?

It keeps the width and height in their original proportion, so setting one calculates the other. Turning it off lets you set both, which stretches or squashes the image.

Which output format should I choose?

WebP for the smallest file at a given quality, JPEG for maximum compatibility with photographs, PNG when you need transparency or perfectly sharp flat colour.

Is the original file changed?

No. The file on your device is untouched. The tool draws a resized copy and offers that as a download.

What is the largest image I can resize?

Limited by your device's memory, since the whole image is held in the tab. Very large images from professional cameras may be slow on a phone.

Is my image uploaded?

No. It is read and redrawn by your browser. Nothing crosses the network, which is why this is safe for photos you would not hand to a hosted service.

If the image resizer is not quite what you need, these other free tools solve closely related problems.

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