🖼️ Advanced Image Resizer

Use this free image resizer to quickly change dimensions, aspect ratios and formats for one or many images at once. Everything runs directly in your browser, so your photos stay on your device while you prepare them for social media, web or print.

Upload Images

Click to upload images

Supports PNG, JPEG, WebP • Single or multiple files

How to Use Image Resizer

Click the upload area and select one or more images, or drag them into the box.

Review how many files were loaded and confirm the formats you want to work with.

Set a target width and height, then decide whether to lock the aspect ratio.

Optionally choose an aspect ratio or social media preset to match platform requirements.

Select the desired output format and adjust quality if you are exporting JPEG or WebP.

Click Resize to process all selected images, then download them individually or in batch.

Key Features & Security

Batch processing support so you can resize multiple images in one run.

Presets for popular social platforms to save time configuring sizes.

Support for PNG, JPEG and WebP output formats with adjustable quality.

Clear size comparison between original and resized files to see savings.

Local processing for better privacy and faster turnaround on modern devices.

Frequently Asked Questions

What does the Image Resizer tool do?

The Image Resizer changes the pixel dimensions and format of your images. It is ideal for preparing graphics for websites, social media posts, thumbnails and presentations without opening a heavy desktop editor.

Is the utoolsy Image Resizer secure?

Yes. All resizing happens in your browser using the canvas API. Images are not uploaded to utoolsy servers, so sensitive or private photos stay on your device while you work.

Which image formats does this resizer support?

You can upload common web formats such as PNG, JPEG and WebP. The output format can match the original or be converted to PNG, JPEG or WebP depending on your needs.

Can I resize multiple images at once?

Yes. When you upload more than one image, the tool switches into batch mode. All images will be processed with the same settings, and you can download them individually or via the Download All button.

Will resizing reduce image quality?

Resizing always changes pixel data, but high-quality interpolation and adjustable JPEG/WebP quality let you balance file size and visual clarity. For critical assets, test a few settings before final export.