Client-Side Image Resizer

Resize PNG, JPEG, and WebP images directly in your browser with aspect ratio locking and quality control.

Your tool input is processed locally in your browser and is not sent to our servers.

Client-Side Image Resizer

Choose an image to resize

Supports PNG, JPEG, and WebP. Processed 100% locally in browser memory.

Select Image File

What this tool does

Scales and resizes image dimensions locally in your browser using HTML5 Canvas. Maintain original aspect ratios, choose output formats (PNG, JPEG, WebP), and adjust compression quality.

How to use this tool

Upload an image from your computer.
Enter your desired target width or height (aspect ratio is preserved automatically by default).
Select your output format and click "Resize Image Now".
Download your resized image instantly.

Aspect Ratio Scaling Formula

Target Height = (Target Width / Original Width) × Original Height

Preserving proportional aspect ratio prevents distortion and stretching when resizing images.

Practical Examples

Banner Downscaling

Resize a 4K 3840×2160 screenshot to 1920×1080.

Input: 3840×2160 image scaled to 1920 width

Output: 1920×1080 high-quality output image

Frequently Asked Questions

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