365tools

Image Resizer

Resize images to exact dimensions. Batch supported with aspect ratio lock.

Files processed in your browser — never uploaded

How Image Resizer Works

1

Upload your images

Drop one or more images. Dimensions are auto-filled from your first image.

2

Set size & lock ratio

Enter target width/height, or pick a preset. Toggle aspect ratio lock to avoid distortion.

3

Download resized images

Preview before and after, then download individually or as a ZIP.

Key Features

Exact Pixel Dimensions

Enter your target width and height in pixels. The resized image will match exactly.

Aspect Ratio Lock

Toggle ratio lock to update height automatically when you change width, preventing distortion.

Quick Presets

One-click presets for common sizes: Full HD (1920×1080), HD (1280×720), 800×600, 512×512, 256×256.

100% Private

Resizing uses the browser's Canvas API. Your images never leave your device.

Batch & ZIP

Resize multiple images at once with one click, then download individually or as a ZIP archive.

Instant Results

Canvas-based resizing is nearly instant even for large images, with no server round trips.

Frequently Asked Questions

Q
Can I resize multiple images at once?
A
Yes. Add as many images as you need — they will all be resized to the same dimensions with a single click.
Q
What does aspect ratio lock do?
A
When enabled, changing the width automatically updates the height to keep the original proportions, and vice versa. This prevents your image from appearing stretched or squished.
Q
What are the quick presets?
A
Presets set common dimensions instantly: 1920×1080 (Full HD), 1280×720 (HD), 800×600, 512×512, and 256×256. Presets disable aspect ratio lock so they apply as-is.
Q
Will my images be uploaded to a server?
A
No. All resizing uses the browser's Canvas API and runs entirely on your device. Your files never leave your browser.
Q
Which output formats are supported?
A
JPG, PNG, WebP, and AVIF. JPG is recommended for photos, PNG for graphics with transparency, and WebP/AVIF for web use with the best file size.

Need to Convert or Compress Too?

Image Converter

Convert between PNG, JPG, WebP, AVIF, GIF, and BMP with quality control.

Image Compressor

Reduce JPG and PNG file size with before/after preview and savings display.

Merge PDFs

Combine multiple PDFs into one document with drag-to-reorder support.