M ToolsMio

Image Resize

Resize JPG, PNG, and WEBP images to exact dimensions, percentages, or a max box - in your browser. Batch support, aspect ratio lock, 100% private.

Drag & drop images here, or click to select

You can also paste (Ctrl+V)

Features

100% Browser-Based

All resizing happens in your browser. Your images never leave your device.

Exact Dimensions

Set exact width and height, scale by percentage, or fit within a maximum box - with an aspect ratio lock.

Batch Resize

Resize multiple images at once with a live preview of every result and one-click ZIP download.

Free & Instant

No sign-up, no watermarks, no upload waiting. Results update in real time as you change settings.

How to Resize Images?

  1. Drag and drop images onto the upload area, or click to select files.
  2. Pick a resize mode: exact pixels, percentage, or fit within a box.
  3. Enter the target size - the aspect ratio stays locked by default.
  4. Review the live preview of dimensions and file size for each image.
  5. Download images individually or as a ZIP file.

Common Use Cases

Website Images

Resize photos to your site's exact content width (e.g. 1920px or 800px) for faster page loads.

E-commerce Listings

Meet marketplace dimension requirements (Amazon, Shopify, eBay) without distorting product photos.

Social Media

Prepare images for posts, banners, and avatars with exact pixel dimensions per platform.

Email & Documents

Shrink oversized photos so they fit email attachment limits and document layouts.

Resize Tips

Frequently Asked Questions

Is my image data sent to any server?
No. All resizing happens entirely in your browser using the Canvas API. Your images are never uploaded, never stored, and never leave your device - you can verify this in the browser DevTools Network tab.
How do I resize an image without losing quality?
Downscaling (making an image smaller) preserves quality very well. Avoid enlarging images - upscaling stretches pixels and looks blurry. Keep the aspect ratio locked so the image is not distorted, and export as PNG or high-quality JPG/WEBP.
What is the difference between resizing and cropping?
Resizing changes the dimensions of the whole image while keeping all of its content - everything just gets smaller or larger. Cropping cuts out a region of the image and discards the rest. If you want to remove parts of the image, use the Image Crop tool instead.
What image formats are supported?
You can import JPG, PNG, WEBP, GIF, BMP, and HEIC (iPhone photos). Export as the original format or convert to JPG, PNG, or WEBP while resizing.
Is there a file size limit?
Files up to 25MB are supported. Larger files may exhaust browser memory on some devices, so the tool skips them automatically.

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