Skip to main content
Alona Tool – Free Online Tools

Image Resizer

Popular Runs in Your Browser

Resize photos to exact pixel widths and heights, or scale down by percentage. Lock aspect ratio to prevent stretching and export in high-quality PNG, JPG, or WebP.

Browser-based: this tool works on your device and does not send your input to an Alona Tool server. See the Privacy Policy for details.
Fast Processing

Loading Image Resizer… This tool is an interactive page and needs JavaScript enabled in your browser.

Example Usage & Test Cases

Web Banner
Input Scenario:
Resize 4000x3000 photo to 1200px width
Generated Result:
1200x900 proportional resized image

How It Works

1

Uses bicubic canvas scaling algorithms to resample pixels cleanly to target dimensions.

Frequently Asked Questions

Yes! Keep the "Lock Aspect Ratio" toggle turned on to adjust height automatically when you type a width.

Good to Know

Common uses

  • Preparing images for profile pictures, blogs or documents

Limitations and notes

  • Enlarging an image cannot add detail, so it will look soft. Keep the aspect ratio locked to avoid stretching.

Related Tools

Image Cropper

Crop photos to custom shapes or standard aspect ratios…

Open Popular

Image Compressor

Compress JPG, PNG, and WebP images locally in your browser

Open

Image Rotator & Flipper

Rotate images 90°, 180°, 270° or flip horizontally and…

Open

JPG to PNG Converter

Convert compressed JPG/JPEG images to lossless PNG format

Open

Fast Online Image Resizer with Aspect Ratio Lock

Resize photos to exact dimensions for social media banners, blog headers, and passport photos.

Key Highlights:

  • Custom pixel dimensions or percentage scaling
  • Lock aspect ratio toggle
  • Format selector (PNG, JPG, WebP)